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|
import pytest
import sqlalchemy as sa
from sqlalchemy_utils.aggregates import aggregated
@pytest.fixture
def User(Base):
user_group = sa.Table(
'user_group',
Base.metadata,
sa.Column('user_id', sa.Integer, sa.ForeignKey('user.id')),
sa.Column('group_id', sa.Integer, sa.ForeignKey('group.id'))
)
class User(Base):
__tablename__ = 'user'
id = sa.Column(sa.Integer, primary_key=True)
name = sa.Column(sa.Unicode(255))
@aggregated('groups', sa.Column(sa.Integer, default=0))
def group_count(self):
return sa.func.count('1')
groups = sa.orm.relationship(
'Group',
backref='users',
secondary=user_group
)
return User
@pytest.fixture
def Group(Base):
class Group(Base):
__tablename__ = 'group'
id = sa.Column(sa.Integer, primary_key=True)
name = sa.Column(sa.Unicode(255))
return Group
@pytest.fixture
def init_models(User, Group):
pass
@pytest.mark.skip
@pytest.mark.usefixtures('postgresql_dsn')
class TestAggregatesWithManyToManyRelationships:
def test_assigns_aggregates_on_insert(self, session, User, Group):
user = User(
name='John Matrix'
)
session.add(user)
session.commit()
group = Group(
name='Some group',
users=[user]
)
session.add(group)
session.commit()
session.refresh(user)
assert user.group_count == 1
def test_updates_aggregates_on_delete(self, session, User, Group):
user = User(
name='John Matrix'
)
session.add(user)
session.commit()
group = Group(
name='Some group',
users=[user]
)
session.add(group)
session.commit()
session.refresh(user)
user.groups = []
session.commit()
session.refresh(user)
assert user.group_count == 0
|
