23 lines
628 B
Python
23 lines
628 B
Python
from sqlalchemy import Column, Integer, ForeignKey
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from .devices import entity_types_registry
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from .sensors import NumericSensor
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if not entity_types_registry.get('TemperatureSensor'):
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class TemperatureSensor(NumericSensor):
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__tablename__ = 'temperature_sensor'
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id = Column(
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Integer, ForeignKey(NumericSensor.id, ondelete='CASCADE'), primary_key=True
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)
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__mapper_args__ = {
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'polymorphic_identity': __tablename__,
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}
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entity_types_registry['TemperatureSensor'] = TemperatureSensor
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else:
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TemperatureSensor = entity_types_registry['TemperatureSensor']
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