26 lines
590 B
Python
26 lines
590 B
Python
from sqlalchemy import Column, Integer, ForeignKey
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from platypush.common.db import Base
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from .three_axis import ThreeAxisSensor
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if 'accelerometer' not in Base.metadata:
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class Accelerometer(ThreeAxisSensor):
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"""
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An entity that represents the value of an accelerometer sensor.
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"""
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__tablename__ = 'accelerometer'
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id = Column(
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Integer,
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ForeignKey(ThreeAxisSensor.id, ondelete='CASCADE'),
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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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