27 lines
630 B
Python
27 lines
630 B
Python
from sqlalchemy import Column, Integer, ForeignKey
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from platypush.common.db import is_defined
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from .three_axis import ThreeAxisSensor
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if not is_defined('magnetometer'):
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class Magnetometer(ThreeAxisSensor):
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"""
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An entity that represents the value of a magnetometer.
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"""
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__tablename__ = 'magnetometer'
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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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__table_args__ = {'extend_existing': True}
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__mapper_args__ = {
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'polymorphic_identity': __tablename__,
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}
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