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1
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""" |
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2
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River model |
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3
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""" |
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from flask import url_for |
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from app.database import db |
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7
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# many to many table to connect rivers to regions |
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8
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rivers_regions = db.Table('rivers_regions', |
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9
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db.Column('river', db.Integer, db.ForeignKey('rivers.id')), |
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10
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db.Column('region', db.Integer, db.ForeignKey('regions.id')) |
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11
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) |
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12
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13
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14
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class River(db.Model): |
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""" |
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River model. Rivers are rivers as we know them they have a parent that they |
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flow downstream into and have tributaries that flow into them. |
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18
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19
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Arguments: |
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id (int): Primary River id |
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name (string): Nice River name |
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22
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slug (string): slug for url formatting |
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description (text): Long description that can contain HTML or Markdown within reason. |
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short_description (text): Short description for showing on other pages. |
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header_image (string): Header image to override default |
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parent_id (int): River.id for the river that this one flows into |
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parent: ``River`` object from parent_id |
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tributary: List of ``River`` objects for any River that has this one in it's parent_id. |
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regions: List of ``Region`` objects for River |
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sections: List of ``Section`` objects for River |
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""" |
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__tablename__ = 'rivers' |
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id = db.Column(db.Integer, primary_key=True) |
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name = db.Column(db.String(80)) |
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slug = db.Column(db.String(80), unique=True) |
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description = db.Column(db.Text) |
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short_description = db.Column(db.Text) |
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header_image = db.Column(db.String(80)) |
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41
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parent_id = db.Column(db.Integer, db.ForeignKey('rivers.id')) |
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parent = db.relationship('River', remote_side=id, backref='tributary') |
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44
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regions = db.relationship('Region', secondary=rivers_regions, |
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backref=db.backref('rivers', lazy='dynamic')) |
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47
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#def __init__(self, name, slug, description, |
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# short_description, header_image, parent): |
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# self.name = name |
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# self.slug = slug |
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# self.description = description |
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# self.short_description = short_description |
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# self.header_image = header_image |
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# self.parent = parent |
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56
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def to_json(self): |
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""" |
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Creates a JSON Object from River. Used where multiple rivers may be |
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listed at once. |
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""" |
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json_river = { |
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'id': self.id, |
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'name': self.name, |
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'html': url_for('main.riverpage', slug=self.slug, _external=True), |
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'url': url_for('api.get_river', rid=self.id, _external=True), |
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} |
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return json_river |
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68
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69
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def to_long_json(self): |
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""" |
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Creates a JSON Object from River. Used where a single river is being |
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displayed. |
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""" |
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json_river = { |
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'id': self.id, |
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'name': self.name, |
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'html': url_for('main.riverpage', slug=self.slug, _external=True), |
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'url': url_for('api.get_river', rid=self.id, _external=True), |
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79
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'regions': [region.to_json() for region in self.regions], |
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80
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'sections': [section.to_json() for section in self.sections], |
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81
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'tributaries': [river.to_json() for river in self.tributary], |
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82
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'gages': [gage.to_json() for gage in self.gages] |
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} |
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if self.parent is not None: |
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json_river['downstream'] = self.parent.to_json() |
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86
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return json_river |
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87
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88
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def __repr__(self): |
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89
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return '<River %r>' % self.name |
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90
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91
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def __str__(self): |
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92
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return self.name |
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93
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abkfenris /
gage-web
