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import pytest
import sqlalchemy as sa
from sqlalchemy_utils import generic_relationship
@pytest.fixture
def Employee(Base):
class Employee(Base):
__tablename__ = 'employee'
id = sa.Column(sa.Integer, primary_key=True)
name = sa.Column(sa.String(50))
type = sa.Column(sa.String(20))
__mapper_args__ = {
'polymorphic_on': type,
'polymorphic_identity': 'employee'
}
return Employee
@pytest.fixture
def Manager(Employee):
class Manager(Employee):
__mapper_args__ = {
'polymorphic_identity': 'manager'
}
return Manager
@pytest.fixture
def Engineer(Employee):
class Engineer(Employee):
__mapper_args__ = {
'polymorphic_identity': 'engineer'
}
return Engineer
@pytest.fixture
def Event(Base):
class Event(Base):
__tablename__ = 'event'
id = sa.Column(sa.Integer, primary_key=True)
object_type = sa.Column(sa.Unicode(255))
object_id = sa.Column(sa.Integer, nullable=False)
object = generic_relationship(object_type, object_id)
return Event
@pytest.fixture
def init_models(Employee, Manager, Engineer, Event):
pass
class TestGenericRelationship:
def test_set_as_none(self, Event):
event = Event()
event.object = None
assert event.object is None
def test_set_manual_and_get(self, session, Manager, Event):
manager = Manager()
session.add(manager)
session.commit()
event = Event()
event.object_id = manager.id
event.object_type = type(manager).__name__
assert event.object is None
session.add(event)
session.commit()
assert event.object == manager
def test_set_and_get(self, session, Manager, Event):
manager = Manager()
session.add(manager)
session.commit()
event = Event(object=manager)
assert event.object_id == manager.id
assert event.object_type == type(manager).__name__
session.add(event)
session.commit()
assert event.object == manager
def test_compare_instance(self, session, Manager, Event):
manager1 = Manager()
manager2 = Manager()
session.add_all([manager1, manager2])
session.commit()
event = Event(object=manager1)
session.add(event)
session.commit()
assert event.object == manager1
assert event.object != manager2
def test_compare_query(self, session, Manager, Event):
manager1 = Manager()
manager2 = Manager()
session.add_all([manager1, manager2])
session.commit()
event = Event(object=manager1)
session.add(event)
session.commit()
q = session.query(Event)
assert q.filter_by(object=manager1).first() is not None
assert q.filter_by(object=manager2).first() is None
assert q.filter(Event.object == manager2).first() is None
def test_compare_not_query(self, session, Manager, Event):
manager1 = Manager()
manager2 = Manager()
session.add_all([manager1, manager2])
session.commit()
event = Event(object=manager1)
session.add(event)
session.commit()
q = session.query(Event)
assert q.filter(Event.object != manager2).first() is not None
def test_compare_type(self, session, Manager, Event):
manager1 = Manager()
manager2 = Manager()
session.add_all([manager1, manager2])
session.commit()
event1 = Event(object=manager1)
event2 = Event(object=manager2)
session.add_all([event1, event2])
session.commit()
statement = Event.object.is_type(Manager)
q = session.query(Event).filter(statement)
assert q.first() is not None
def test_compare_super_type(self, session, Manager, Event, Employee):
manager1 = Manager()
manager2 = Manager()
session.add_all([manager1, manager2])
session.commit()
event1 = Event(object=manager1)
event2 = Event(object=manager2)
session.add_all([event1, event2])
session.commit()
statement = Event.object.is_type(Employee)
q = session.query(Event).filter(statement)
assert q.first() is not None
|
