platypush/platypush/entities/humidity.py

44 lines
1.0 KiB
Python

from sqlalchemy import Column, Integer, ForeignKey
from platypush.common.db import is_defined
from .sensors import NumericSensor
if not is_defined('humidity_sensor'):
class HumiditySensor(NumericSensor):
"""
A sensor that measures humidity.
"""
__tablename__ = 'humidity_sensor'
id = Column(
Integer, ForeignKey(NumericSensor.id, ondelete='CASCADE'), primary_key=True
)
__table_args__ = {'extend_existing': True}
__mapper_args__ = {
'polymorphic_identity': __tablename__,
}
if not is_defined('dew_point_sensor'):
class DewPointSensor(NumericSensor):
"""
A sensor that measures the dew point.
"""
__tablename__ = 'dew_point_sensor'
id = Column(
Integer, ForeignKey(NumericSensor.id, ondelete='CASCADE'), primary_key=True
)
__table_args__ = {'extend_existing': True}
__mapper_args__ = {
'polymorphic_identity': __tablename__,
}