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1
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""" |
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2
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Model for sample |
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3
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""" |
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4
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from flask import url_for |
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5
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6
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from app.database import db |
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7
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8
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9
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class Sample(db.Model): |
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10
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""" |
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11
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Sample model |
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12
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13
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Arguments: |
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14
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id (int): Primary Sample key |
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15
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sensor_id (int): Foreign ``Sensor``.id key |
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16
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sensor: ``Sensor`` object related to this sample |
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17
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datetime (datetime): ``datetime`` object of this sample (should in UTC) |
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18
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value (float): Value of sample |
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19
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""" |
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20
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__tablename__ = 'samples' |
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21
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22
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id = db.Column(db.Integer, primary_key=True) |
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23
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24
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sensor_id = db.Column(db.Integer, db.ForeignKey('sensors.id'), index=True) |
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25
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sensor = db.relationship('Sensor', backref=db.backref('samples')) |
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26
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27
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datetime = db.Column(db.DateTime, index=True) |
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28
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value = db.Column(db.Float) |
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29
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30
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def to_json(self): |
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31
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""" |
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32
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Creates a JSON object from Sample. Used where multiple samples will be |
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33
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displayed at once. |
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34
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""" |
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35
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json_sample = { |
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36
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'id': self.id, |
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37
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'sensor': self.sensor.to_sample_json(), |
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38
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'value': self.value, |
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39
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'datetime': self.datetime, |
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40
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'url': url_for('api.get_sample', sid=self.id, _external=True) |
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41
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} |
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42
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return json_sample |
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43
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44
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def to_sensor_json(self): |
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45
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""" |
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46
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Creates a JSON object from Sample for used with Sensor JSON. |
|
47
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""" |
|
48
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json_sample = { |
|
49
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'id': self.id, |
|
50
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'value': self.value, |
|
51
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'datetime': str(self.datetime), |
|
52
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'url': url_for('api.get_sample', sid=self.id, _external=True) |
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53
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} |
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54
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return json_sample |
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55
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|
56
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def __repr__(self): |
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57
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return '<Sample %r>' % self.id |
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58
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|
abkfenris /
gage-web
