myems / myems-api

space.py

import falcon
import simplejson as json
import mysql.connector
import config
import uuid
from datetime import datetime
from anytree import AnyNode
from anytree.exporter import JsonExporter


class SpaceCollection:
    @staticmethod
    def __init__():
        pass

    @staticmethod
    def on_options(req, resp):
        resp.status = falcon.HTTP_200

    @staticmethod
    def on_get(req, resp):
        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor(dictionary=True)

        query = (" SELECT id, name, uuid "
                 " FROM tbl_spaces ")
        cursor.execute(query)
        rows_spaces = cursor.fetchall()

        space_dict = dict()
        if rows_spaces is not None and len(rows_spaces) > 0:
            for row in rows_spaces:
                space_dict[row['id']] = {"id": row['id'],
                                         "name": row['name'],
                                         "uuid": row['uuid']}

        query = (" SELECT id, name, utc_offset "
                 " FROM tbl_timezones ")
        cursor.execute(query)
        rows_timezones = cursor.fetchall()

        timezone_dict = dict()
        if rows_timezones is not None and len(rows_timezones) > 0:
            for row in rows_timezones:
                timezone_dict[row['id']] = {"id": row['id'],
                                            "name": row['name'],
                                            "utc_offset": row['utc_offset']}

        query = (" SELECT id, name, uuid "
                 " FROM tbl_contacts ")
        cursor.execute(query)
        rows_contacts = cursor.fetchall()

        contact_dict = dict()
        if rows_contacts is not None and len(rows_contacts) > 0:
            for row in rows_contacts:
                contact_dict[row['id']] = {"id": row['id'],
                                           "name": row['name'],
                                           "uuid": row['uuid']}

        query = (" SELECT id, name, uuid "
                 " FROM tbl_cost_centers ")
        cursor.execute(query)
        rows_cost_centers = cursor.fetchall()

        cost_center_dict = dict()
        if rows_cost_centers is not None and len(rows_cost_centers) > 0:
            for row in rows_cost_centers:
                cost_center_dict[row['id']] = {"id": row['id'],
                                               "name": row['name'],
                                               "uuid": row['uuid']}

        query = (" SELECT id, name, uuid, "
                 "        parent_space_id, area, timezone_id, is_input_counted, is_output_counted, "
                 "        contact_id, cost_center_id, description "
                 " FROM tbl_spaces "
                 " ORDER BY id ")
        cursor.execute(query)
        rows_spaces = cursor.fetchall()

        result = list()
        if rows_spaces is not None and len(rows_spaces) > 0:

This code seems to be duplicated in your project.

            for row in rows_spaces:
                timezone = timezone_dict.get(row['timezone_id'], None)
                contact = contact_dict.get(row['contact_id'], None)
                cost_center = cost_center_dict.get(row['cost_center_id'], None)
                parent_space = space_dict.get(row['parent_space_id'], None)
                meta_result = {"id": row['id'],
                               "name": row['name'],
                               "uuid": row['uuid'],
                               "parent_space": parent_space,
                               "area": row['area'],
                               "timezone": timezone,
                               "is_input_counted": bool(row['is_input_counted']),
                               "is_output_counted": bool(row['is_output_counted']),
                               "contact": contact,
                               "cost_center": cost_center,
                               "description": row['description']}
                result.append(meta_result)

        cursor.close()
        cnx.disconnect()
        resp.body = json.dumps(result)

    @staticmethod
    def on_post(req, resp):
        """Handles POST requests"""
        try:
            raw_json = req.stream.read().decode('utf-8')
            new_values = json.loads(raw_json, encoding='utf-8')
        except Exception as ex:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.ERROR', description=ex)

        if 'name' not in new_values['data'].keys() or \
                not isinstance(new_values['data']['name'], str) or \
                len(str.strip(new_values['data']['name'])) == 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_NAME')
        name = str.strip(new_values['data']['name'])

        if 'parent_space_id' in new_values['data'].keys():
            if new_values['data']['parent_space_id'] <= 0:
                raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                       description='API.INVALID_PARENT_SPACE_ID')
            parent_space_id = new_values['data']['parent_space_id']
        else:
            parent_space_id = None

        if 'area' not in new_values['data'].keys() or \
                not (isinstance(new_values['data']['area'], float) or
                     isinstance(new_values['data']['area'], int)):
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_AREA_VALUE')
        area = new_values['data']['area']

        if 'timezone_id' not in new_values['data'].keys() or \
                not isinstance(new_values['data']['timezone_id'], int) or \
                new_values['data']['timezone_id'] <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_TIMEZONE_ID')
        timezone_id = new_values['data']['timezone_id']

        if 'is_input_counted' not in new_values['data'].keys() or \
                not isinstance(new_values['data']['is_input_counted'], bool):
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_IS_INPUT_COUNTED_VALUE')
        is_input_counted = new_values['data']['is_input_counted']

        if 'is_output_counted' not in new_values['data'].keys() or \
                not isinstance(new_values['data']['is_output_counted'], bool):
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_IS_OUTPUT_COUNTED_VALUE')
        is_output_counted = new_values['data']['is_output_counted']

        if 'contact_id' in new_values['data'].keys():
            if new_values['data']['contact_id'] <= 0:
                raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                       description='API.INVALID_CONTACT_ID')
            contact_id = new_values['data']['contact_id']
        else:
            contact_id = None

        if 'cost_center_id' in new_values['data'].keys():
            if new_values['data']['cost_center_id'] <= 0:
                raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                       description='API.INVALID_COST_CENTER_ID')
            cost_center_id = new_values['data']['cost_center_id']
        else:
            cost_center_id = None

        if 'description' in new_values['data'].keys() and \
                new_values['data']['description'] is not None and \
                len(str(new_values['data']['description'])) > 0:
            description = str.strip(new_values['data']['description'])
        else:
            description = None

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " FROM tbl_spaces "
                       " WHERE name = %s ", (name,))
        if cursor.fetchone() is not None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.BAD_REQUEST',
                                   description='API.SPACE_NAME_IS_ALREADY_IN_USE')

        if parent_space_id is not None:

This code seems to be duplicated in your project.

            cursor.execute(" SELECT name "
                           " FROM tbl_spaces "
                           " WHERE id = %s ",
                           (new_values['data']['parent_space_id'],))
            row = cursor.fetchone()
            if row is None:
                cursor.close()
                cnx.disconnect()
                raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                       description='API.PARENT_SPACE_NOT_FOUND')

        cursor.execute(" SELECT name "
                       " FROM tbl_timezones "
                       " WHERE id = %s ",
                       (new_values['data']['timezone_id'],))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.TIMEZONE_NOT_FOUND')
        if contact_id is not None:

This code seems to be duplicated in your project.

            cursor.execute(" SELECT name "
                           " FROM tbl_contacts "
                           " WHERE id = %s ",
                           (new_values['data']['contact_id'],))
            row = cursor.fetchone()
            if row is None:
                cursor.close()
                cnx.disconnect()
                raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                       description='API.CONTACT_NOT_FOUND')

        if cost_center_id is not None:
            cursor.execute(" SELECT name "
                           " FROM tbl_cost_centers "
                           " WHERE id = %s ",
                           (new_values['data']['cost_center_id'],))
            row = cursor.fetchone()
            if row is None:
                cursor.close()
                cnx.disconnect()
                raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                       description='API.COST_CENTER_NOT_FOUND')

        add_values = (" INSERT INTO tbl_spaces "
                      "    (name, uuid, parent_space_id, area, timezone_id, is_input_counted, is_output_counted, "
                      "     contact_id, cost_center_id, description) "
                      " VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s) ")
        cursor.execute(add_values, (name,
                                    str(uuid.uuid4()),
                                    parent_space_id,
                                    area,
                                    timezone_id,
                                    is_input_counted,
                                    is_output_counted,
                                    contact_id,
                                    cost_center_id,
                                    description))
        new_id = cursor.lastrowid
        cnx.commit()
        cursor.close()
        cnx.disconnect()

        resp.status = falcon.HTTP_201
        resp.location = '/spaces/' + str(new_id)


class SpaceItem:
    @staticmethod
    def __init__():
        pass

    @staticmethod
    def on_options(req, resp, id_):
        resp.status = falcon.HTTP_200

    @staticmethod
    def on_get(req, resp, id_):
        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_METER_ID')

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor(dictionary=True)

        query = (" SELECT id, name, uuid "
                 " FROM tbl_spaces ")
        cursor.execute(query)
        rows_spaces = cursor.fetchall()

        space_dict = dict()
        if rows_spaces is not None and len(rows_spaces) > 0:
            for row in rows_spaces:
                space_dict[row['id']] = {"id": row['id'],
                                         "name": row['name'],
                                         "uuid": row['uuid']}

        query = (" SELECT id, name, utc_offset "
                 " FROM tbl_timezones ")
        cursor.execute(query)
        rows_timezones = cursor.fetchall()

        timezone_dict = dict()
        if rows_timezones is not None and len(rows_timezones) > 0:
            for row in rows_timezones:
                timezone_dict[row['id']] = {"id": row['id'],
                                            "name": row['name'],
                                            "utc_offset": row['utc_offset']}

        query = (" SELECT id, name, uuid "
                 " FROM tbl_contacts ")
        cursor.execute(query)
        rows_contacts = cursor.fetchall()

        contact_dict = dict()
        if rows_contacts is not None and len(rows_contacts) > 0:
            for row in rows_contacts:
                contact_dict[row['id']] = {"id": row['id'],
                                           "name": row['name'],
                                           "uuid": row['uuid']}

        query = (" SELECT id, name, uuid "
                 " FROM tbl_cost_centers ")
        cursor.execute(query)
        rows_cost_centers = cursor.fetchall()

        cost_center_dict = dict()
        if rows_cost_centers is not None and len(rows_cost_centers) > 0:
            for row in rows_cost_centers:
                cost_center_dict[row['id']] = {"id": row['id'],
                                               "name": row['name'],
                                               "uuid": row['uuid']}

        query = (" SELECT id, name, uuid, "
                 "        parent_space_id, area, timezone_id, is_input_counted, is_output_counted, "
                 "        contact_id, cost_center_id, description "
                 " FROM tbl_spaces "
                 " WHERE id = %s ")
        cursor.execute(query, (id_,))
        row = cursor.fetchone()
        cursor.close()
        cnx.disconnect()

        if row is None:
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')
        else:
            parent_space = space_dict.get(row['parent_space_id'], None)
            timezone = timezone_dict.get(row['timezone_id'], None)
            contact = contact_dict.get(row['contact_id'], None)
            cost_center = cost_center_dict.get(row['cost_center_id'], None)
            meta_result = {"id": row['id'],
                           "name": row['name'],
                           "uuid": row['uuid'],
                           "parent_space_id": parent_space,
                           "area": row['area'],
                           "timezone": timezone,
                           "is_input_counted": bool(row['is_input_counted']),
                           "is_output_counted": bool(row['is_output_counted']),
                           "contact": contact,
                           "cost_center": cost_center,
                           "description": row['description']}

        resp.body = json.dumps(meta_result)

    @staticmethod
    def on_delete(req, resp, id_):
        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')
        if int(id_) == 1:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.THIS_SPACE_CAN_NOT_BE_DELETED')

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " FROM tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        # checkout relation with children spaces
        cursor.execute(" SELECT id "
                       " FROM tbl_spaces "
                       " WHERE parent_space_id = %s ",
                       (id_,))
        rows_spaces = cursor.fetchall()
        if rows_spaces is not None and len(rows_spaces) > 0:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_400,
                                   title='API.BAD_REQUEST',
                                   description='API.THERE_IS_RELATION_WITH_CHILDREN_SPACES')

        # check relation with equipment
        cursor.execute(" SELECT equipment_id "
                       " FROM tbl_spaces_equipments "
                       " WHERE space_id = %s ",
                       (id_,))
        rows_equipments = cursor.fetchall()
        if rows_equipments is not None and len(rows_equipments) > 0:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_400,
                                   title='API.BAD_REQUEST',
                                   description='API.THERE_IS_RELATION_WITH_EQUIPMENTS')

        # check relation with combined equipment
        cursor.execute(" SELECT combined_equipment_id "
                       " FROM tbl_spaces_combined_equipments "
                       " WHERE space_id = %s ",
                       (id_,))
        rows_combined_equipments = cursor.fetchall()
        if rows_combined_equipments is not None and len(rows_combined_equipments) > 0:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_400,
                                   title='API.BAD_REQUEST',
                                   description='API.THERE_IS_RELATION_WITH_COMBINED_EQUIPMENTS')

        # check relation with meter
        cursor.execute(" SELECT meter_id "
                       " FROM tbl_spaces_meters "
                       " WHERE space_id = %s ",
                       (id_,))
        rows_meters = cursor.fetchall()
        if rows_meters is not None and len(rows_meters) > 0:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_400,
                                   title='API.BAD_REQUEST',
                                   description='API.THERE_IS_RELATION_WITH_METERS')

        # check relation with offline meter
        cursor.execute(" SELECT offline_meter_id "
                       " FROM tbl_spaces_offline_meters "
                       " WHERE space_id = %s ",
                       (id_,))
        rows_offline_meters = cursor.fetchall()
        if rows_offline_meters is not None and len(rows_offline_meters) > 0:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_400,
                                   title='API.BAD_REQUEST',
                                   description='API.THERE_IS_RELATION_WITH_OFFLINE_METERS')

        # check relation with points
        cursor.execute(" SELECT point_id "
                       " FROM tbl_spaces_points "
                       " WHERE space_id = %s ", (id_,))
        rows_points = cursor.fetchall()
        if rows_points is not None and len(rows_points) > 0:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_400,
                                   title='API.BAD_REQUEST',
                                   description='API.THERE_IS_RELATION_WITH_POINTS')

        # check relation with sensor
        cursor.execute(" SELECT sensor_id "
                       " FROM tbl_spaces_sensors "
                       " WHERE space_id = %s ",
                       (id_,))
        rows_sensors = cursor.fetchall()
        if rows_sensors is not None and len(rows_sensors) > 0:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_400,
                                   title='API.BAD_REQUEST',
                                   description='API.THERE_IS_RELATION_WITH_SENSORS')

        # check relation with store
        cursor.execute(" SELECT id "
                       " FROM tbl_spaces_stores "
                       " WHERE space_id = %s ", (id_,))
        rows_stores = cursor.fetchall()
        if rows_stores is not None and len(rows_stores) > 0:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_400,
                                   title='API.BAD_REQUEST',
                                   description='API.THERE_IS_RELATION_WITH_STORES')

        # check relation with tenant
        cursor.execute(" SELECT id "
                       " FROM tbl_spaces_tenants "
                       " WHERE space_id = %s ", (id_,))
        rows_tenants = cursor.fetchall()
        if rows_tenants is not None and len(rows_tenants) > 0:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_400,
                                   title='API.BAD_REQUEST',
                                   description='API.THERE_IS_RELATION_WITH_TENANTS')

        # check relation with virtual meter
        cursor.execute(" SELECT virtual_meter_id "
                       " FROM tbl_spaces_virtual_meters "
                       " WHERE space_id = %s ",
                       (id_,))
        rows_virtual_meters = cursor.fetchall()
        if rows_virtual_meters is not None and len(rows_virtual_meters) > 0:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_400,
                                   title='API.BAD_REQUEST',
                                   description='API.THERE_IS_RELATION_WITH_VIRTUAL_METERS')

        cursor.execute(" DELETE FROM tbl_spaces WHERE id = %s ", (id_,))
        cnx.commit()

        cursor.close()
        cnx.disconnect()

        resp.status = falcon.HTTP_204

    @staticmethod
    def on_put(req, resp, id_):
        """Handles PUT requests"""
        try:
            raw_json = req.stream.read().decode('utf-8')
        except Exception as ex:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.EXCEPTION', description=ex)

        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        new_values = json.loads(raw_json, encoding='utf-8')

        if 'name' not in new_values['data'].keys() or \
                not isinstance(new_values['data']['name'], str) or \
                len(str.strip(new_values['data']['name'])) == 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_NAME')
        name = str.strip(new_values['data']['name'])

        if int(id_) == 1:
            parent_space_id = None
        else:
            if 'parent_space_id' not in new_values['data'].keys() or \
                    new_values['data']['parent_space_id'] is None or \
                    not isinstance(new_values['data']['parent_space_id'], int) or \
                    int(new_values['data']['parent_space_id']) <= 0:
                raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                       description='API.INVALID_TIMEZONE_ID')
            parent_space_id = int(new_values['data']['parent_space_id'])

        if 'area' not in new_values['data'].keys() or \
                not (isinstance(new_values['data']['area'], float) or
                     isinstance(new_values['data']['area'], int)):
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_AREA_VALUE')
        area = new_values['data']['area']

        if 'timezone_id' not in new_values['data'].keys() or \
                not isinstance(new_values['data']['timezone_id'], int) or \
                new_values['data']['timezone_id'] <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_TIMEZONE_ID')
        timezone_id = new_values['data']['timezone_id']

        if 'is_input_counted' not in new_values['data'].keys() or \
                not isinstance(new_values['data']['is_input_counted'], bool):
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_IS_INPUT_COUNTED_VALUE')
        is_input_counted = new_values['data']['is_input_counted']

        if 'is_output_counted' not in new_values['data'].keys() or \
                not isinstance(new_values['data']['is_output_counted'], bool):
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_IS_OUTPUT_COUNTED_VALUE')
        is_output_counted = new_values['data']['is_output_counted']

        if 'contact_id' in new_values['data'].keys():
            if new_values['data']['contact_id'] <= 0:
                raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                       description='API.INVALID_CONTACT_ID')
            contact_id = new_values['data']['contact_id']
        else:
            contact_id = None

        if 'cost_center_id' in new_values['data'].keys():
            if new_values['data']['cost_center_id'] <= 0:
                raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                       description='API.INVALID_COST_CENTER_ID')
            cost_center_id = new_values['data']['cost_center_id']
        else:
            cost_center_id = None

        if 'description' in new_values['data'].keys() and \
                new_values['data']['description'] is not None and \
                len(str(new_values['data']['description'])) > 0:
            description = str.strip(new_values['data']['description'])
        else:
            description = None

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " FROM tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        cursor.execute(" SELECT name "
                       " FROM tbl_spaces "
                       " WHERE name = %s AND id != %s ", (name, id_))
        if cursor.fetchone() is not None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.BAD_REQUEST',
                                   description='API.SPACE_NAME_IS_ALREADY_IN_USE')

        if parent_space_id is not None:

This code seems to be duplicated in your project.

            cursor.execute(" SELECT name "
                           " FROM tbl_spaces "
                           " WHERE id = %s ",
                           (new_values['data']['parent_space_id'],))
            row = cursor.fetchone()
            if row is None:
                cursor.close()
                cnx.disconnect()
                raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                       description='API.PARENT_SPACE_NOT_FOUND')

        cursor.execute(" SELECT name "
                       " FROM tbl_timezones "
                       " WHERE id = %s ",
                       (new_values['data']['timezone_id'],))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.TIMEZONE_NOT_FOUND')
        if contact_id is not None:

This code seems to be duplicated in your project.

            cursor.execute(" SELECT name "
                           " FROM tbl_contacts "
                           " WHERE id = %s ",
                           (new_values['data']['contact_id'],))
            row = cursor.fetchone()
            if row is None:
                cursor.close()
                cnx.disconnect()
                raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                       description='API.CONTACT_NOT_FOUND')

        if cost_center_id is not None:
            cursor.execute(" SELECT name "
                           " FROM tbl_cost_centers "
                           " WHERE id = %s ",
                           (new_values['data']['cost_center_id'],))
            row = cursor.fetchone()
            if row is None:
                cursor.close()
                cnx.disconnect()
                raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                       description='API.COST_CENTER_NOT_FOUND')

        update_row = (" UPDATE tbl_spaces "
                      " SET name = %s, parent_space_id = %s, area = %s, timezone_id = %s, "
                      "     is_input_counted = %s, is_output_counted = %s, contact_id = %s, cost_center_id = %s, "
                      "     description = %s "
                      " WHERE id = %s ")
        cursor.execute(update_row, (name,
                                    parent_space_id,
                                    area,
                                    timezone_id,
                                    is_input_counted,
                                    is_output_counted,
                                    contact_id,
                                    cost_center_id,
                                    description,
                                    id_))
        cnx.commit()

        cursor.close()
        cnx.disconnect()

        resp.status = falcon.HTTP_200


class SpaceChildrenCollection:
    @staticmethod
    def __init__():
        pass

    @staticmethod
    def on_options(req, resp, id_):
        resp.status = falcon.HTTP_200

    @staticmethod
    def on_get(req, resp, id_):
        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor(dictionary=True)

        cursor.execute(" SELECT name "
                       " FROM tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        query = (" SELECT id, name, uuid "
                 " FROM tbl_spaces ")
        cursor.execute(query)
        rows_spaces = cursor.fetchall()

        space_dict = dict()
        if rows_spaces is not None and len(rows_spaces) > 0:
            for row in rows_spaces:
                space_dict[row['id']] = {"id": row['id'],
                                         "name": row['name'],
                                         "uuid": row['uuid']}

        query = (" SELECT id, name, utc_offset "
                 " FROM tbl_timezones ")
        cursor.execute(query)
        rows_timezones = cursor.fetchall()

        timezone_dict = dict()
        if rows_timezones is not None and len(rows_timezones) > 0:
            for row in rows_timezones:
                timezone_dict[row['id']] = {"id": row['id'],
                                            "name": row['name'],
                                            "utc_offset": row['utc_offset']}

        query = (" SELECT id, name, uuid "
                 " FROM tbl_contacts ")
        cursor.execute(query)
        rows_contacts = cursor.fetchall()

        contact_dict = dict()
        if rows_contacts is not None and len(rows_contacts) > 0:
            for row in rows_contacts:
                contact_dict[row['id']] = {"id": row['id'],
                                           "name": row['name'],
                                           "uuid": row['uuid']}

        query = (" SELECT id, name, uuid "
                 " FROM tbl_cost_centers ")
        cursor.execute(query)
        rows_cost_centers = cursor.fetchall()

        cost_center_dict = dict()
        if rows_cost_centers is not None and len(rows_cost_centers) > 0:
            for row in rows_cost_centers:
                cost_center_dict[row['id']] = {"id": row['id'],
                                               "name": row['name'],
                                               "uuid": row['uuid']}

        query = (" SELECT id, name, uuid, "
                 "        parent_space_id, area, timezone_id, is_input_counted, is_output_counted, "
                 "        contact_id, cost_center_id, description "
                 " FROM tbl_spaces "
                 " WHERE parent_space_id = %s "
                 " ORDER BY id ")
        cursor.execute(query, (id_, ))
        rows_spaces = cursor.fetchall()

        result = list()
        if rows_spaces is not None and len(rows_spaces) > 0:

This code seems to be duplicated in your project.

            for row in rows_spaces:
                timezone = timezone_dict.get(row['timezone_id'], None)
                contact = contact_dict.get(row['contact_id'], None)
                cost_center = cost_center_dict.get(row['cost_center_id'], None)
                parent_space = space_dict.get(row['parent_space_id'], None)
                meta_result = {"id": row['id'],
                               "name": row['name'],
                               "uuid": row['uuid'],
                               "parent_space": parent_space,
                               "area": row['area'],
                               "timezone": timezone,
                               "is_input_counted": bool(row['is_input_counted']),
                               "is_output_counted": bool(row['is_output_counted']),
                               "contact": contact,
                               "cost_center": cost_center,
                               "description": row['description']}
                result.append(meta_result)

        cursor.close()
        cnx.disconnect()
        resp.body = json.dumps(result)


class SpaceCombinedEquipmentCollection:

This code seems to be duplicated in your project.

    @staticmethod
    def __init__():
        pass

    @staticmethod
    def on_options(req, resp, id_):
        resp.status = falcon.HTTP_200

    @staticmethod
    def on_get(req, resp, id_):
        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " FROM tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        query = (" SELECT e.id, e.name, e.uuid "
                 " FROM tbl_spaces s, tbl_spaces_combined_equipments se, tbl_combined_equipments e "
                 " WHERE se.space_id = s.id AND e.id = se.combined_equipment_id AND s.id = %s "
                 " ORDER BY e.id ")
        cursor.execute(query, (id_,))
        rows = cursor.fetchall()

        result = list()
        if rows is not None and len(rows) > 0:
            for row in rows:
                meta_result = {"id": row[0], "name": row[1], "uuid": row[2]}
                result.append(meta_result)

        resp.body = json.dumps(result)

    @staticmethod
    def on_post(req, resp, id_):
        """Handles POST requests"""
        try:
            raw_json = req.stream.read().decode('utf-8')
        except Exception as ex:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.EXCEPTION', description=ex)

        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        new_values = json.loads(raw_json, encoding='utf-8')

        if 'combined_equipment_id' not in new_values['data'].keys() or \
                not isinstance(new_values['data']['combined_equipment_id'], int) or \
                new_values['data']['combined_equipment_id'] <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_COMBINED_EQUIPMENT_ID')
        combined_equipment_id = new_values['data']['combined_equipment_id']

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " from tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        cursor.execute(" SELECT name "
                       " FROM tbl_combined_equipments "
                       " WHERE id = %s ", (combined_equipment_id,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.COMBINED_EQUIPMENT_NOT_FOUND')

        query = (" SELECT id " 
                 " FROM tbl_spaces_combined_equipments "
                 " WHERE space_id = %s AND combined_equipment_id = %s")
        cursor.execute(query, (id_, combined_equipment_id,))
        if cursor.fetchone() is not None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_400, title='API.ERROR',
                                   description='API.SPACE_COMBINED_EQUIPMENT_RELATION_EXISTED')

        add_row = (" INSERT INTO tbl_spaces_combined_equipments (space_id, combined_equipment_id) "
                   " VALUES (%s, %s) ")
        cursor.execute(add_row, (id_, combined_equipment_id,))
        new_id = cursor.lastrowid
        cnx.commit()
        cursor.close()
        cnx.disconnect()

        resp.status = falcon.HTTP_201
        resp.location = '/spaces/' + str(id_) + '/combinedequipments/' + str(combined_equipment_id)


class SpaceCombinedEquipmentItem:

This code seems to be duplicated in your project.

    @staticmethod
    def __init__():
        pass

    @staticmethod
    def on_options(req, resp, id_, eid):
            resp.status = falcon.HTTP_200

    @staticmethod
    def on_delete(req, resp, id_, eid):
        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        if not eid.isdigit() or int(eid) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_COMBINED_EQUIPMENT_ID')

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " FROM tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        cursor.execute(" SELECT name "
                       " FROM tbl_combined_equipments "
                       " WHERE id = %s ", (eid,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.COMBINED_EQUIPMENT_NOT_FOUND')

        cursor.execute(" SELECT id "
                       " FROM tbl_spaces_combined_equipments "
                       " WHERE space_id = %s AND combined_equipment_id = %s ", (id_, eid))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_COMBINED_EQUIPMENT_RELATION_NOT_FOUND')

        cursor.execute(" DELETE FROM tbl_spaces_combined_equipments "
                       " WHERE space_id = %s AND combined_equipment_id = %s ", (id_, eid))
        cnx.commit()

        cursor.close()
        cnx.disconnect()

        resp.status = falcon.HTTP_204


class SpaceEquipmentCollection:

This code seems to be duplicated in your project.

    @staticmethod
    def __init__():
        pass

    @staticmethod
    def on_options(req, resp, id_):
        resp.status = falcon.HTTP_200

    @staticmethod
    def on_get(req, resp, id_):
        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " FROM tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        query = (" SELECT e.id, e.name, e.uuid "
                 " FROM tbl_spaces s, tbl_spaces_equipments se, tbl_equipments e "
                 " WHERE se.space_id = s.id AND e.id = se.equipment_id AND s.id = %s "
                 " ORDER BY e.id ")
        cursor.execute(query, (id_,))
        rows = cursor.fetchall()

        result = list()
        if rows is not None and len(rows) > 0:
            for row in rows:
                meta_result = {"id": row[0], "name": row[1], "uuid": row[2]}
                result.append(meta_result)

        resp.body = json.dumps(result)

    @staticmethod
    def on_post(req, resp, id_):
        """Handles POST requests"""
        try:
            raw_json = req.stream.read().decode('utf-8')
        except Exception as ex:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.EXCEPTION', description=ex)

        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        new_values = json.loads(raw_json, encoding='utf-8')

        if 'equipment_id' not in new_values['data'].keys() or \
                not isinstance(new_values['data']['equipment_id'], int) or \
                new_values['data']['equipment_id'] <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_EQUIPMENT_ID')
        equipment_id = new_values['data']['equipment_id']

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " from tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        cursor.execute(" SELECT name "
                       " FROM tbl_equipments "
                       " WHERE id = %s ", (equipment_id,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.EQUIPMENT_NOT_FOUND')

        query = (" SELECT id " 
                 " FROM tbl_spaces_equipments "
                 " WHERE space_id = %s AND equipment_id = %s")
        cursor.execute(query, (id_, equipment_id,))
        if cursor.fetchone() is not None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_400, title='API.ERROR',
                                   description='API.SPACE_EQUIPMENT_RELATION_EXISTED')

        add_row = (" INSERT INTO tbl_spaces_equipments (space_id, equipment_id) "
                   " VALUES (%s, %s) ")
        cursor.execute(add_row, (id_, equipment_id,))
        new_id = cursor.lastrowid
        cnx.commit()
        cursor.close()
        cnx.disconnect()

        resp.status = falcon.HTTP_201
        resp.location = '/spaces/' + str(id_) + '/equipments/' + str(equipment_id)


class SpaceEquipmentItem:

This code seems to be duplicated in your project.

    @staticmethod
    def __init__():
        pass

    @staticmethod
    def on_options(req, resp, id_, eid):
            resp.status = falcon.HTTP_200

    @staticmethod
    def on_delete(req, resp, id_, eid):
        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        if not eid.isdigit() or int(eid) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_EQUIPMENT_ID')

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " FROM tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        cursor.execute(" SELECT name "
                       " FROM tbl_equipments "
                       " WHERE id = %s ", (eid,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.EQUIPMENT_NOT_FOUND')

        cursor.execute(" SELECT id "
                       " FROM tbl_spaces_equipments "
                       " WHERE space_id = %s AND equipment_id = %s ", (id_, eid))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_EQUIPMENT_RELATION_NOT_FOUND')

        cursor.execute(" DELETE FROM tbl_spaces_equipments WHERE space_id = %s AND equipment_id = %s ", (id_, eid))
        cnx.commit()

        cursor.close()
        cnx.disconnect()

        resp.status = falcon.HTTP_204


class SpaceMeterCollection:

This code seems to be duplicated in your project.

    @staticmethod
    def __init__():
        pass

    @staticmethod
    def on_options(req, resp, id_):
        resp.status = falcon.HTTP_200

    @staticmethod
    def on_get(req, resp, id_):
        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor(dictionary=True)

        cursor.execute(" SELECT name "
                       " FROM tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        query = (" SELECT id, name, uuid "
                 " FROM tbl_energy_categories ")
        cursor.execute(query)
        rows_energy_categories = cursor.fetchall()

        energy_category_dict = dict()
        if rows_energy_categories is not None and len(rows_energy_categories) > 0:
            for row in rows_energy_categories:
                energy_category_dict[row['id']] = {"id": row['id'],
                                                   "name": row['name'],
                                                   "uuid": row['uuid']}

        query = (" SELECT m.id, m.name, m.uuid, m.energy_category_id "
                 " FROM tbl_spaces s, tbl_spaces_meters sm, tbl_meters m "
                 " WHERE sm.space_id = s.id AND m.id = sm.meter_id AND s.id = %s "
                 " ORDER BY m.id ")
        cursor.execute(query, (id_,))
        rows = cursor.fetchall()

        result = list()
        if rows is not None and len(rows) > 0:
            for row in rows:
                energy_category = energy_category_dict.get(row['energy_category_id'], None)
                meta_result = {"id": row['id'], "name": row['name'], "uuid": row['uuid'],
                               "energy_category": energy_category}
                result.append(meta_result)

        resp.body = json.dumps(result)

    @staticmethod
    def on_post(req, resp, id_):
        """Handles POST requests"""
        try:
            raw_json = req.stream.read().decode('utf-8')
        except Exception as ex:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.EXCEPTION', description=ex)

        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        new_values = json.loads(raw_json, encoding='utf-8')

        if 'meter_id' not in new_values['data'].keys() or \
                not isinstance(new_values['data']['meter_id'], int) or \
                new_values['data']['meter_id'] <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_METER_ID')
        meter_id = new_values['data']['meter_id']

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " from tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        cursor.execute(" SELECT name "
                       " FROM tbl_meters "
                       " WHERE id = %s ", (meter_id,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.METER_NOT_FOUND')

        query = (" SELECT id " 
                 " FROM tbl_spaces_meters "
                 " WHERE space_id = %s AND meter_id = %s")
        cursor.execute(query, (id_, meter_id,))
        if cursor.fetchone() is not None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_400, title='API.ERROR',
                                   description='API.SPACE_METER_RELATION_EXISTED')

        add_row = (" INSERT INTO tbl_spaces_meters (space_id, meter_id) "
                   " VALUES (%s, %s) ")
        cursor.execute(add_row, (id_, meter_id,))
        new_id = cursor.lastrowid
        cnx.commit()
        cursor.close()
        cnx.disconnect()

        resp.status = falcon.HTTP_201
        resp.location = '/spaces/' + str(id_) + '/meters/' + str(meter_id)


class SpaceMeterItem:

This code seems to be duplicated in your project.

    @staticmethod
    def __init__():
        pass

    @staticmethod
    def on_options(req, resp, id_, mid):
            resp.status = falcon.HTTP_200

    @staticmethod
    def on_delete(req, resp, id_, mid):
        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        if not mid.isdigit() or int(mid) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_METER_ID')

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " FROM tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        cursor.execute(" SELECT name "
                       " FROM tbl_meters "
                       " WHERE id = %s ", (mid,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.METER_NOT_FOUND')

        cursor.execute(" SELECT id "
                       " FROM tbl_spaces_meters "
                       " WHERE space_id = %s AND meter_id = %s ", (id_, mid))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_METER_RELATION_NOT_FOUND')

        cursor.execute(" DELETE FROM tbl_spaces_meters WHERE space_id = %s AND meter_id = %s ", (id_, mid))
        cnx.commit()

        cursor.close()
        cnx.disconnect()

        resp.status = falcon.HTTP_204


class SpaceOfflineMeterCollection:

This code seems to be duplicated in your project.

    @staticmethod
    def __init__():
        pass

    @staticmethod
    def on_options(req, resp, id_):
        resp.status = falcon.HTTP_200

    @staticmethod
    def on_get(req, resp, id_):
        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor(dictionary=True)

        cursor.execute(" SELECT name "
                       " FROM tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        query = (" SELECT id, name, uuid "
                 " FROM tbl_energy_categories ")
        cursor.execute(query)
        rows_energy_categories = cursor.fetchall()

        energy_category_dict = dict()
        if rows_energy_categories is not None and len(rows_energy_categories) > 0:
            for row in rows_energy_categories:
                energy_category_dict[row['id']] = {"id": row['id'],
                                                   "name": row['name'],
                                                   "uuid": row['uuid']}

        query = (" SELECT m.id, m.name, m.uuid, m.energy_category_id "
                 " FROM tbl_spaces s, tbl_spaces_offline_meters sm, tbl_offline_meters m "
                 " WHERE sm.space_id = s.id AND m.id = sm.offline_meter_id AND s.id = %s "
                 " ORDER BY m.id ")
        cursor.execute(query, (id_,))
        rows = cursor.fetchall()

        result = list()
        if rows is not None and len(rows) > 0:
            for row in rows:
                energy_category = energy_category_dict.get(row['energy_category_id'], None)
                meta_result = {"id": row['id'], "name": row['name'], "uuid": row['uuid'],
                               "energy_category": energy_category}
                result.append(meta_result)

        resp.body = json.dumps(result)

    @staticmethod
    def on_post(req, resp, id_):
        """Handles POST requests"""
        try:
            raw_json = req.stream.read().decode('utf-8')
        except Exception as ex:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.EXCEPTION', description=ex)

        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        new_values = json.loads(raw_json, encoding='utf-8')

        if 'offline_meter_id' not in new_values['data'].keys() or \
                not isinstance(new_values['data']['offline_meter_id'], int) or \
                new_values['data']['offline_meter_id'] <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_OFFLINE_METER_ID')
        offline_meter_id = new_values['data']['offline_meter_id']

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " from tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        cursor.execute(" SELECT name "
                       " FROM tbl_offline_meters "
                       " WHERE id = %s ", (offline_meter_id,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.OFFLINE_METER_NOT_FOUND')

        query = (" SELECT id " 
                 " FROM tbl_spaces_offline_meters "
                 " WHERE space_id = %s AND offline_meter_id = %s")
        cursor.execute(query, (id_, offline_meter_id,))
        if cursor.fetchone() is not None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_400, title='API.ERROR',
                                   description='API.SPACE_OFFLINE_METER_RELATION_EXISTED')

        add_row = (" INSERT INTO tbl_spaces_offline_meters (space_id, offline_meter_id) "
                   " VALUES (%s, %s) ")
        cursor.execute(add_row, (id_, offline_meter_id,))
        new_id = cursor.lastrowid
        cnx.commit()
        cursor.close()
        cnx.disconnect()

        resp.status = falcon.HTTP_201
        resp.location = '/spaces/' + str(id_) + '/offlinemeters/' + str(offline_meter_id)


class SpaceOfflineMeterItem:

This code seems to be duplicated in your project.

    @staticmethod
    def __init__():
        pass

    @staticmethod
    def on_options(req, resp, id_, mid):
            resp.status = falcon.HTTP_200

    @staticmethod
    def on_delete(req, resp, id_, mid):
        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        if not mid.isdigit() or int(mid) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_OFFLINE_METER_ID')

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " FROM tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        cursor.execute(" SELECT name "
                       " FROM tbl_offline_meters "
                       " WHERE id = %s ", (mid,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.OFFLINE_METER_NOT_FOUND')

        cursor.execute(" SELECT id "
                       " FROM tbl_spaces_offline_meters "
                       " WHERE space_id = %s AND offline_meter_id = %s ", (id_, mid))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_OFFLINE_METER_RELATION_NOT_FOUND')

        cursor.execute(" DELETE FROM tbl_spaces_offline_meters "
                       " WHERE space_id = %s AND offline_meter_id = %s ", (id_, mid))
        cnx.commit()

        cursor.close()
        cnx.disconnect()

        resp.status = falcon.HTTP_204


class SpacePointCollection:

This code seems to be duplicated in your project.

    @staticmethod
    def __init__():
        pass

    @staticmethod
    def on_options(req, resp, id_):
        resp.status = falcon.HTTP_200

    @staticmethod
    def on_get(req, resp, id_):
        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor(dictionary=True)

        cursor.execute(" SELECT name "
                       " FROM tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        query = (" SELECT id, name, uuid "
                 " FROM tbl_data_sources ")
        cursor.execute(query)
        rows_data_sources = cursor.fetchall()

        data_source_dict = dict()
        if rows_data_sources is not None and len(rows_data_sources) > 0:
            for row in rows_data_sources:
                data_source_dict[row['id']] = {"id": row['id'],
                                               "name": row['name'],
                                               "uuid": row['uuid']}

        query = (" SELECT p.id, p.name, p.data_source_id "
                 " FROM tbl_spaces s, tbl_spaces_points sp, tbl_points p "
                 " WHERE sp.space_id = s.id AND p.id = sp.point_id AND s.id = %s "
                 " ORDER BY p.id ")
        cursor.execute(query, (id_,))
        rows = cursor.fetchall()

        result = list()
        if rows is not None and len(rows) > 0:
            for row in rows:
                data_source = data_source_dict.get(row['data_source_id'], None)
                meta_result = {"id": row['id'], "name": row['name'], "data_source": data_source}
                result.append(meta_result)

        resp.body = json.dumps(result)

    @staticmethod
    def on_post(req, resp, id_):
        """Handles POST requests"""
        try:
            raw_json = req.stream.read().decode('utf-8')
        except Exception as ex:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.EXCEPTION', description=ex)

        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        new_values = json.loads(raw_json, encoding='utf-8')

        if 'point_id' not in new_values['data'].keys() or \
                not isinstance(new_values['data']['point_id'], int) or \
                new_values['data']['point_id'] <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_POINT_ID')
        point_id = new_values['data']['point_id']

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " from tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        cursor.execute(" SELECT name "
                       " FROM tbl_points "
                       " WHERE id = %s ", (point_id,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.POINT_NOT_FOUND')

        query = (" SELECT id " 
                 " FROM tbl_spaces_points "
                 " WHERE space_id = %s AND point_id = %s")
        cursor.execute(query, (id_, point_id,))
        if cursor.fetchone() is not None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_400, title='API.ERROR',
                                   description='API.SPACE_POINT_RELATION_EXISTED')

        add_row = (" INSERT INTO tbl_spaces_points (space_id, point_id) "
                   " VALUES (%s, %s) ")
        cursor.execute(add_row, (id_, point_id,))
        new_id = cursor.lastrowid
        cnx.commit()
        cursor.close()
        cnx.disconnect()

        resp.status = falcon.HTTP_201
        resp.location = '/spaces/' + str(id_) + '/points/' + str(point_id)


class SpacePointItem:

This code seems to be duplicated in your project.

    @staticmethod
    def __init__():
        pass

    @staticmethod
    def on_options(req, resp, id_, pid):
            resp.status = falcon.HTTP_200

    @staticmethod
    def on_delete(req, resp, id_, pid):
        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        if not pid.isdigit() or int(pid) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_POINT_ID')

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " FROM tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        cursor.execute(" SELECT name "
                       " FROM tbl_points "
                       " WHERE id = %s ", (pid,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.POINT_NOT_FOUND')

        cursor.execute(" SELECT id "
                       " FROM tbl_spaces_points "
                       " WHERE space_id = %s AND point_id = %s ", (id_, pid))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_POINT_RELATION_NOT_FOUND')

        cursor.execute(" DELETE FROM tbl_spaces_points "
                       " WHERE space_id = %s AND point_id = %s ", (id_, pid))
        cnx.commit()

        cursor.close()
        cnx.disconnect()

        resp.status = falcon.HTTP_204


class SpaceSensorCollection:

This code seems to be duplicated in your project.

    @staticmethod
    def __init__():
        pass

    @staticmethod
    def on_options(req, resp, id_):
        resp.status = falcon.HTTP_200

    @staticmethod
    def on_get(req, resp, id_):
        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " FROM tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        query = (" SELECT se.id, se.name, se.uuid "
                 " FROM tbl_spaces sp, tbl_spaces_sensors ss, tbl_sensors se "
                 " WHERE ss.space_id = sp.id AND se.id = ss.sensor_id AND sp.id = %s "
                 " ORDER BY se.id ")
        cursor.execute(query, (id_,))
        rows = cursor.fetchall()

        result = list()
        if rows is not None and len(rows) > 0:
            for row in rows:
                meta_result = {"id": row[0], "name": row[1], "uuid": row[2]}
                result.append(meta_result)

        resp.body = json.dumps(result)

    @staticmethod
    def on_post(req, resp, id_):
        """Handles POST requests"""
        try:
            raw_json = req.stream.read().decode('utf-8')
        except Exception as ex:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.EXCEPTION', description=ex)

        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        new_values = json.loads(raw_json, encoding='utf-8')

        if 'sensor_id' not in new_values['data'].keys() or \
                not isinstance(new_values['data']['sensor_id'], int) or \
                new_values['data']['sensor_id'] <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SENSOR_ID')
        sensor_id = new_values['data']['sensor_id']

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " from tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        cursor.execute(" SELECT name "
                       " FROM tbl_sensors "
                       " WHERE id = %s ", (sensor_id,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SENSOR_NOT_FOUND')

        query = (" SELECT id " 
                 " FROM tbl_spaces_sensors "
                 " WHERE space_id = %s AND sensor_id = %s")
        cursor.execute(query, (id_, sensor_id,))
        if cursor.fetchone() is not None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_400, title='API.ERROR',
                                   description='API.SPACE_SENSOR_RELATION_EXISTED')

        add_row = (" INSERT INTO tbl_spaces_sensors (space_id, sensor_id) "
                   " VALUES (%s, %s) ")
        cursor.execute(add_row, (id_, sensor_id,))
        new_id = cursor.lastrowid
        cnx.commit()
        cursor.close()
        cnx.disconnect()

        resp.status = falcon.HTTP_201
        resp.location = '/spaces/' + str(id_) + '/sensors/' + str(sensor_id)


class SpaceSensorItem:

This code seems to be duplicated in your project.

    @staticmethod
    def __init__():
        pass

    @staticmethod
    def on_options(req, resp, id_, sid):
            resp.status = falcon.HTTP_200

    @staticmethod
    def on_delete(req, resp, id_, sid):
        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        if not sid.isdigit() or int(sid) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SENSOR_ID')

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " FROM tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        cursor.execute(" SELECT name "
                       " FROM tbl_sensors "
                       " WHERE id = %s ", (sid,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SENSOR_NOT_FOUND')

        cursor.execute(" SELECT id "
                       " FROM tbl_spaces_sensors "
                       " WHERE space_id = %s AND sensor_id = %s ", (id_, sid))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_SENSOR_RELATION_NOT_FOUND')

        cursor.execute(" DELETE FROM tbl_spaces_sensors WHERE space_id = %s AND sensor_id = %s ", (id_, sid))
        cnx.commit()

        cursor.close()
        cnx.disconnect()

        resp.status = falcon.HTTP_204


class SpaceShopfloorCollection:

This code seems to be duplicated in your project.

    @staticmethod
    def __init__():
        pass

    @staticmethod
    def on_options(req, resp, id_):
        resp.status = falcon.HTTP_200

    @staticmethod
    def on_get(req, resp, id_):
        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " FROM tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        query = (" SELECT sf.id, sf.name, sf.uuid "
                 " FROM tbl_spaces sp, tbl_spaces_shopfloors ss, tbl_shopfloors sf "
                 " WHERE ss.space_id = sp.id AND sf.id = ss.shopfloor_id AND sp.id = %s "
                 " ORDER BY sf.id ")
        cursor.execute(query, (id_,))
        rows = cursor.fetchall()

        result = list()
        if rows is not None and len(rows) > 0:
            for row in rows:
                meta_result = {"id": row[0], "name": row[1], "uuid": row[2]}
                result.append(meta_result)

        resp.body = json.dumps(result)

    @staticmethod
    def on_post(req, resp, id_):
        """Handles POST requests"""
        try:
            raw_json = req.stream.read().decode('utf-8')
        except Exception as ex:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.EXCEPTION', description=ex)

        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        new_values = json.loads(raw_json, encoding='utf-8')

        if 'shopfloor_id' not in new_values['data'].keys() or \
                not isinstance(new_values['data']['shopfloor_id'], int) or \
                new_values['data']['shopfloor_id'] <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SHOPFLOOR_ID')
        shopfloor_id = new_values['data']['shopfloor_id']

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " from tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        cursor.execute(" SELECT name "
                       " FROM tbl_shopfloors "
                       " WHERE id = %s ", (shopfloor_id,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SHOPFLOOR_NOT_FOUND')

        query = (" SELECT id " 
                 " FROM tbl_spaces_shopfloors "
                 " WHERE space_id = %s AND shopfloor_id = %s")
        cursor.execute(query, (id_, shopfloor_id,))
        if cursor.fetchone() is not None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_400, title='API.ERROR',
                                   description='API.SPACE_SHOPFLOOR_RELATION_EXISTED')

        add_row = (" INSERT INTO tbl_spaces_shopfloors (space_id, shopfloor_id) "
                   " VALUES (%s, %s) ")
        cursor.execute(add_row, (id_, shopfloor_id,))
        new_id = cursor.lastrowid
        cnx.commit()
        cursor.close()
        cnx.disconnect()

        resp.status = falcon.HTTP_201
        resp.location = '/spaces/' + str(id_) + '/shopfloors/' + str(shopfloor_id)


class SpaceShopfloorItem:

This code seems to be duplicated in your project.

    @staticmethod
    def __init__():
        pass

    @staticmethod
    def on_options(req, resp, id_, sid):
            resp.status = falcon.HTTP_200

    @staticmethod
    def on_delete(req, resp, id_, sid):
        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        if not sid.isdigit() or int(sid) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SHOPFLOOR_ID')

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " FROM tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        cursor.execute(" SELECT name "
                       " FROM tbl_shopfloors "
                       " WHERE id = %s ", (sid,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SHOPFLOOR_NOT_FOUND')

        cursor.execute(" SELECT id "
                       " FROM tbl_spaces_shopfloors "
                       " WHERE space_id = %s AND shopfloor_id = %s ", (id_, sid))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_SHOPFLOOR_RELATION_NOT_FOUND')

        cursor.execute(" DELETE FROM tbl_spaces_shopfloors WHERE space_id = %s AND shopfloor_id = %s ", (id_, sid))
        cnx.commit()

        cursor.close()
        cnx.disconnect()

        resp.status = falcon.HTTP_204


class SpaceStoreCollection:

This code seems to be duplicated in your project.

    @staticmethod
    def __init__():
        pass

    @staticmethod
    def on_options(req, resp, id_):
        resp.status = falcon.HTTP_200

    @staticmethod
    def on_get(req, resp, id_):
        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " FROM tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        query = (" SELECT t.id, t.name, t.uuid "
                 " FROM tbl_spaces s, tbl_spaces_stores st, tbl_stores t "
                 " WHERE st.space_id = s.id AND t.id = st.store_id AND s.id = %s "
                 " ORDER BY t.id ")
        cursor.execute(query, (id_,))
        rows = cursor.fetchall()

        result = list()
        if rows is not None and len(rows) > 0:
            for row in rows:
                meta_result = {"id": row[0], "name": row[1], "uuid": row[2]}
                result.append(meta_result)

        resp.body = json.dumps(result)

    @staticmethod
    def on_post(req, resp, id_):
        """Handles POST requests"""
        try:
            raw_json = req.stream.read().decode('utf-8')
        except Exception as ex:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.EXCEPTION', description=ex)

        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        new_values = json.loads(raw_json, encoding='utf-8')

        if 'store_id' not in new_values['data'].keys() or \
                not isinstance(new_values['data']['store_id'], int) or \
                new_values['data']['store_id'] <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_STORE_ID')
        store_id = new_values['data']['store_id']

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " from tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        cursor.execute(" SELECT name "
                       " FROM tbl_stores "
                       " WHERE id = %s ", (store_id,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.STORE_NOT_FOUND')

        query = (" SELECT id " 
                 " FROM tbl_spaces_stores "
                 " WHERE space_id = %s AND store_id = %s")
        cursor.execute(query, (id_, store_id,))
        if cursor.fetchone() is not None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_400, title='API.ERROR',
                                   description='API.SPACE_STORE_RELATION_EXISTED')

        add_row = (" INSERT INTO tbl_spaces_stores (space_id, store_id) "
                   " VALUES (%s, %s) ")
        cursor.execute(add_row, (id_, store_id,))
        new_id = cursor.lastrowid
        cnx.commit()
        cursor.close()
        cnx.disconnect()

        resp.status = falcon.HTTP_201
        resp.location = '/spaces/' + str(id_) + '/stores/' + str(store_id)


class SpaceStoreItem:

This code seems to be duplicated in your project.

    @staticmethod
    def __init__():
        pass

    @staticmethod
    def on_options(req, resp, id_, tid):
            resp.status = falcon.HTTP_200

    @staticmethod
    def on_delete(req, resp, id_, tid):
        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        if not tid.isdigit() or int(tid) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_STORE_ID')

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " FROM tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        cursor.execute(" SELECT name "
                       " FROM tbl_stores "
                       " WHERE id = %s ", (tid,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.STORE_NOT_FOUND')

        cursor.execute(" SELECT id "
                       " FROM tbl_spaces_stores "
                       " WHERE space_id = %s AND store_id = %s ", (id_, tid))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_STORE_RELATION_NOT_FOUND')

        cursor.execute(" DELETE FROM tbl_spaces_stores WHERE space_id = %s AND store_id = %s ", (id_, tid))
        cnx.commit()

        cursor.close()
        cnx.disconnect()

        resp.status = falcon.HTTP_204


class SpaceTenantCollection:

This code seems to be duplicated in your project.

    @staticmethod
    def __init__():
        pass

    @staticmethod
    def on_options(req, resp, id_):
        resp.status = falcon.HTTP_200

    @staticmethod
    def on_get(req, resp, id_):
        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " FROM tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        query = (" SELECT t.id, t.name, t.uuid "
                 " FROM tbl_spaces s, tbl_spaces_tenants st, tbl_tenants t "
                 " WHERE st.space_id = s.id AND t.id = st.tenant_id AND s.id = %s "
                 " ORDER BY t.id ")
        cursor.execute(query, (id_,))
        rows = cursor.fetchall()

        result = list()
        if rows is not None and len(rows) > 0:
            for row in rows:
                meta_result = {"id": row[0], "name": row[1], "uuid": row[2]}
                result.append(meta_result)

        resp.body = json.dumps(result)

    @staticmethod
    def on_post(req, resp, id_):
        """Handles POST requests"""
        try:
            raw_json = req.stream.read().decode('utf-8')
        except Exception as ex:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.EXCEPTION', description=ex)

        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        new_values = json.loads(raw_json, encoding='utf-8')

        if 'tenant_id' not in new_values['data'].keys() or \
                not isinstance(new_values['data']['tenant_id'], int) or \
                new_values['data']['tenant_id'] <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_TENANT_ID')
        tenant_id = new_values['data']['tenant_id']

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " from tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        cursor.execute(" SELECT name "
                       " FROM tbl_tenants "
                       " WHERE id = %s ", (tenant_id,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.TENANT_NOT_FOUND')

        query = (" SELECT id " 
                 " FROM tbl_spaces_tenants "
                 " WHERE space_id = %s AND tenant_id = %s")
        cursor.execute(query, (id_, tenant_id,))
        if cursor.fetchone() is not None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_400, title='API.ERROR',
                                   description='API.SPACE_TENANT_RELATION_EXISTED')

        add_row = (" INSERT INTO tbl_spaces_tenants (space_id, tenant_id) "
                   " VALUES (%s, %s) ")
        cursor.execute(add_row, (id_, tenant_id,))
        new_id = cursor.lastrowid
        cnx.commit()
        cursor.close()
        cnx.disconnect()

        resp.status = falcon.HTTP_201
        resp.location = '/spaces/' + str(id_) + '/tenants/' + str(tenant_id)


class SpaceTenantItem:

This code seems to be duplicated in your project.

    @staticmethod
    def __init__():
        pass

    @staticmethod
    def on_options(req, resp, id_, tid):
            resp.status = falcon.HTTP_200

    @staticmethod
    def on_delete(req, resp, id_, tid):
        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        if not tid.isdigit() or int(tid) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_TENANT_ID')

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " FROM tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        cursor.execute(" SELECT name "
                       " FROM tbl_tenants "
                       " WHERE id = %s ", (tid,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.TENANT_NOT_FOUND')

        cursor.execute(" SELECT id "
                       " FROM tbl_spaces_tenants "
                       " WHERE space_id = %s AND tenant_id = %s ", (id_, tid))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_TENANT_RELATION_NOT_FOUND')

        cursor.execute(" DELETE FROM tbl_spaces_tenants WHERE space_id = %s AND tenant_id = %s ", (id_, tid))
        cnx.commit()

        cursor.close()
        cnx.disconnect()

        resp.status = falcon.HTTP_204


class SpaceVirtualMeterCollection:

This code seems to be duplicated in your project.

    @staticmethod
    def __init__():
        pass

    @staticmethod
    def on_options(req, resp, id_):
        resp.status = falcon.HTTP_200

    @staticmethod
    def on_get(req, resp, id_):
        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor(dictionary=True)

        cursor.execute(" SELECT name "
                       " FROM tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        query = (" SELECT id, name, uuid "
                 " FROM tbl_energy_categories ")
        cursor.execute(query)
        rows_energy_categories = cursor.fetchall()

        energy_category_dict = dict()
        if rows_energy_categories is not None and len(rows_energy_categories) > 0:
            for row in rows_energy_categories:
                energy_category_dict[row['id']] = {"id": row['id'],
                                                   "name": row['name'],
                                                   "uuid": row['uuid']}

        query = (" SELECT m.id, m.name, m.uuid, m.energy_category_id "
                 " FROM tbl_spaces s, tbl_spaces_virtual_meters sm, tbl_virtual_meters m "
                 " WHERE sm.space_id = s.id AND m.id = sm.virtual_meter_id AND s.id = %s "
                 " ORDER BY m.id ")
        cursor.execute(query, (id_,))
        rows = cursor.fetchall()

        result = list()
        if rows is not None and len(rows) > 0:
            for row in rows:
                energy_category = energy_category_dict.get(row['energy_category_id'], None)
                meta_result = {"id": row['id'], "name": row['name'], "uuid": row['uuid'],
                               "energy_category": energy_category}
                result.append(meta_result)

        resp.body = json.dumps(result)

    @staticmethod
    def on_post(req, resp, id_):
        """Handles POST requests"""
        try:
            raw_json = req.stream.read().decode('utf-8')
        except Exception as ex:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.EXCEPTION', description=ex)

        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        new_values = json.loads(raw_json, encoding='utf-8')

        if 'virtual_meter_id' not in new_values['data'].keys() or \
                not isinstance(new_values['data']['virtual_meter_id'], int) or \
                new_values['data']['virtual_meter_id'] <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_VIRTUAL_METER_ID')
        virtual_meter_id = new_values['data']['virtual_meter_id']

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " from tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        cursor.execute(" SELECT name "
                       " FROM tbl_virtual_meters "
                       " WHERE id = %s ", (virtual_meter_id,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.VIRTUAL_METER_NOT_FOUND')

        query = (" SELECT id " 
                 " FROM tbl_spaces_virtual_meters "
                 " WHERE space_id = %s AND virtual_meter_id = %s")
        cursor.execute(query, (id_, virtual_meter_id,))
        if cursor.fetchone() is not None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_400, title='API.ERROR',
                                   description='API.SPACE_VIRTUAL_METER_RELATION_EXISTED')

        add_row = (" INSERT INTO tbl_spaces_virtual_meters (space_id, virtual_meter_id) "
                   " VALUES (%s, %s) ")
        cursor.execute(add_row, (id_, virtual_meter_id,))
        new_id = cursor.lastrowid
        cnx.commit()
        cursor.close()
        cnx.disconnect()

        resp.status = falcon.HTTP_201
        resp.location = '/spaces/' + str(id_) + '/virtualmeters/' + str(virtual_meter_id)


class SpaceVirtualMeterItem:

This code seems to be duplicated in your project.

    @staticmethod
    def __init__():
        pass

    @staticmethod
    def on_options(req, resp, id_, mid):
            resp.status = falcon.HTTP_200

    @staticmethod
    def on_delete(req, resp, id_, mid):
        if not id_.isdigit() or int(id_) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_SPACE_ID')

        if not mid.isdigit() or int(mid) <= 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_VIRTUAL_METER_ID')

        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor()

        cursor.execute(" SELECT name "
                       " FROM tbl_spaces "
                       " WHERE id = %s ", (id_,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_NOT_FOUND')

        cursor.execute(" SELECT name "
                       " FROM tbl_virtual_meters "
                       " WHERE id = %s ", (mid,))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.VIRTUAL_METER_NOT_FOUND')

        cursor.execute(" SELECT id "
                       " FROM tbl_spaces_virtual_meters "
                       " WHERE space_id = %s AND virtual_meter_id = %s ", (id_, mid))
        if cursor.fetchone() is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.SPACE_VIRTUAL_METER_RELATION_NOT_FOUND')

        cursor.execute(" DELETE FROM tbl_spaces_virtual_meters "
                       " WHERE space_id = %s AND virtual_meter_id = %s ", (id_, mid))
        cnx.commit()

        cursor.close()
        cnx.disconnect()

        resp.status = falcon.HTTP_204


class SpaceTreeCollection:
    @staticmethod
    def __init__():
        pass

    @staticmethod
    def on_options(req, resp):
        resp.status = falcon.HTTP_200

    @staticmethod
    def on_get(req, resp):
        if 'USER-UUID' not in req.headers or \
                not isinstance(req.headers['USER-UUID'], str) or \
                len(str.strip(req.headers['USER-UUID'])) == 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_USER_UUID')
        user_uuid = str.strip(req.headers['USER-UUID'])

        if 'TOKEN' not in req.headers or \
                not isinstance(req.headers['TOKEN'], str) or \
                len(str.strip(req.headers['TOKEN'])) == 0:
            raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                   description='API.INVALID_TOKEN')
        token = str.strip(req.headers['TOKEN'])

        # Verify User Session
        cnx = mysql.connector.connect(**config.myems_user_db)
        cursor = cnx.cursor()
        query = (" SELECT utc_expires "
                 " FROM tbl_sessions "
                 " WHERE user_uuid = %s AND token = %s")
        cursor.execute(query, (user_uuid, token,))
        row = cursor.fetchone()

        if row is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.USER_SESSION_NOT_FOUND')
        else:
            utc_expires = row[0]
            if datetime.utcnow() > utc_expires:
                cursor.close()
                cnx.disconnect()
                raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
                                       description='API.USER_SESSION_TIMEOUT')
        # get privilege
        query = (" SELECT is_admin, privilege_id "
                 " FROM tbl_users "
                 " WHERE uuid = %s ")
        cursor.execute(query, (user_uuid,))
        row = cursor.fetchone()
        if row is None:
            cursor.close()
            cnx.disconnect()
            raise falcon.HTTPError(falcon.HTTP_404, 'API.NOT_FOUND', 'API.USER_NOT_FOUND')
        else:
            is_admin = bool(row[0])
            privilege_id = row[1]

        # get space_id in privilege
        if is_admin:
            space_id = 1
        elif privilege_id is None:
            raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                   description='API.PRIVILEGE_NOT_FOUND')
        else:
            query = (" SELECT data "
                     " FROM tbl_privileges "
                     " WHERE id =%s ")
            cursor.execute(query, (privilege_id,))
            row = cursor.fetchone()
            cursor.close()
            cnx.disconnect()

            if row is None:
                raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                       description='API.PRIVILEGE_NOT_FOUND')
            try:
                data = json.loads(row[0])
            except Exception as ex:
                raise falcon.HTTPError(falcon.HTTP_400, title='API.ERROR', description=ex)

            if 'spaces' not in data or len(data['spaces']) == 0:
                raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                       description='API.SPACE_NOT_FOUND_IN_PRIVILEGE')

            space_id = data['spaces'][0]
            if space_id is None:
                raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
                                       description='API.PRIVILEGE_NOT_FOUND')
        # get all spaces
        cnx = mysql.connector.connect(**config.myems_system_db)
        cursor = cnx.cursor(dictionary=True)

        query = (" SELECT id, name, parent_space_id "
                 " FROM tbl_spaces "
                 " ORDER BY id ")
        cursor.execute(query)
        rows_spaces = cursor.fetchall()
        node_dict = dict()
        if rows_spaces is not None and len(rows_spaces) > 0:
            for row in rows_spaces:
                parent_node = node_dict[row['parent_space_id']] if row['parent_space_id'] is not None else None
                node_dict[row['id']] = AnyNode(id=row['id'], parent=parent_node, name=row['name'])

        cursor.close()
        cnx.disconnect()
        resp.body = JsonExporter(sort_keys=True).export(node_dict[space_id], )