67 lines
2.0 KiB
Python
67 lines
2.0 KiB
Python
from __future__ import unicode_literals
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import six
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import sqlalchemy as sa
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from sqlalchemy.ext.hybrid import hybrid_property
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from sqlalchemy_utils import generic_relationship
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from tests import TestCase
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class TestGenericRelationship(TestCase):
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def create_models(self):
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class User(self.Base):
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__tablename__ = 'user'
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id = sa.Column(sa.Integer, primary_key=True)
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class UserHistory(self.Base):
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__tablename__ = 'user_history'
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id = sa.Column(sa.Integer, primary_key=True)
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transaction_id = sa.Column(sa.Integer, primary_key=True)
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class Event(self.Base):
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__tablename__ = 'event'
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id = sa.Column(sa.Integer, primary_key=True)
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transaction_id = sa.Column(sa.Integer)
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object_type = sa.Column(sa.Unicode(255))
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object_id = sa.Column(sa.Integer, nullable=False)
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object = generic_relationship(
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object_type, object_id
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)
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@hybrid_property
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def object_version_type(self):
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return self.object_type + 'History'
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@object_version_type.expression
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def object_version_type(cls):
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return sa.func.concat(cls.object_type, 'History')
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object_version = generic_relationship(
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object_version_type, (object_id, transaction_id)
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)
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self.User = User
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self.UserHistory = UserHistory
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self.Event = Event
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def test_set_manual_and_get(self):
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user = self.User(id=1)
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history = self.UserHistory(id=1, transaction_id=1)
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self.session.add(user)
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self.session.add(history)
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self.session.commit()
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event = self.Event(transaction_id=1)
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event.object_id = user.id
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event.object_type = six.text_type(type(user).__name__)
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assert event.object is None
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self.session.add(event)
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self.session.commit()
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assert event.object == user
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assert event.object_version == history
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