15 lines
442 B
Python
15 lines
442 B
Python
from app import db
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class Parent():
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__tablename__ = 'user'
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id = db.Column(db.Integer, primary_key=True)
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type = db.Column(db.String(20))
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__mapper_args__ = {
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'polymorphic_identity': __tablename__,
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'polymorphic_on': type
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}
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class Children(Parent):
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__tablename__ = 'member'
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id = db.Column(db.Integer, db.ForeignKey('user.id'), primary_key=True)
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__mapper_args__ = { 'polymorphic_identity': __tablename__ } |