73 lines
2.1 KiB
Python
73 lines
2.1 KiB
Python
import sqlalchemy as sa
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from sqlalchemy_utils.aggregates import aggregated
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from tests import TestCase
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class TestAggregatesWithManyToManyRelationships(TestCase):
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dns = 'postgres://postgres@localhost/sqlalchemy_utils_test'
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def create_models(self):
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user_group = sa.Table(
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'user_group',
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self.Base.metadata,
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sa.Column('user_id', sa.Integer, sa.ForeignKey('user.id')),
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sa.Column('group_id', sa.Integer, sa.ForeignKey('group.id'))
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)
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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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name = sa.Column(sa.Unicode(255))
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@aggregated('groups', sa.Column(sa.Integer, default=0))
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def group_count(self):
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return sa.func.count('1')
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groups = sa.orm.relationship(
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'Group',
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backref='users',
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secondary=user_group
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)
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class Group(self.Base):
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__tablename__ = 'group'
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id = sa.Column(sa.Integer, primary_key=True)
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name = sa.Column(sa.Unicode(255))
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self.User = User
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self.Group = Group
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def test_assigns_aggregates_on_insert(self):
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user = self.User(
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name=u'John Matrix'
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)
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self.session.add(user)
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self.session.commit()
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group = self.Group(
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name=u'Some group',
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users=[user]
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)
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self.session.add(group)
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self.session.commit()
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self.session.refresh(user)
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assert user.group_count == 1
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def test_updates_aggregates_on_delete(self):
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user = self.User(
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name=u'John Matrix'
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)
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self.session.add(user)
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self.session.commit()
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group = self.Group(
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name=u'Some group',
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users=[user]
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)
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self.session.add(group)
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self.session.commit()
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self.session.refresh(user)
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user.groups = []
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self.session.commit()
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self.session.refresh(user)
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assert user.group_count == 0
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