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from django.test import TestCase |
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from django.contrib.auth import get_user_model |
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from django.contrib.contenttypes.models import ContentType |
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from django.contrib.auth.models import Group |
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from actstream.models import Action |
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from actstream.tests.base import LTE |
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9
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class GFKManagerTestCase(TestCase): |
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def setUp(self): |
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User = get_user_model() |
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self.user_ct = ContentType.objects.get_for_model(User) |
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self.group_ct = ContentType.objects.get_for_model(Group) |
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self.group, _ = Group.objects.get_or_create(name='CoolGroup') |
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self.user1, _ = User.objects.get_or_create(username='admin') |
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self.user2, _ = User.objects.get_or_create(username='Two') |
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self.user3, _ = User.objects.get_or_create(username='Three') |
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self.user4, _ = User.objects.get_or_create(username='Four') |
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Action.objects.get_or_create( |
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actor_content_type=self.user_ct, |
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actor_object_id=self.user1.id, |
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verb='followed', |
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target_content_type=self.user_ct, |
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target_object_id=self.user2.id |
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) |
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Action.objects.get_or_create( |
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actor_content_type=self.user_ct, |
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actor_object_id=self.user1.id, |
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verb='followed', |
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target_content_type=self.user_ct, |
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target_object_id=self.user3.id |
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) |
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Action.objects.get_or_create( |
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actor_content_type=self.user_ct, |
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actor_object_id=self.user1.id, |
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verb='followed', |
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target_content_type=self.user_ct, |
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target_object_id=self.user4.id |
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) |
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Action.objects.get_or_create( |
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actor_content_type=self.user_ct, |
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actor_object_id=self.user1.id, |
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verb='joined', |
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target_content_type=self.group_ct, |
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target_object_id=self.group.id |
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) |
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def test_fetch_generic_relations(self): |
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# baseline without fetch_generic_relations |
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_actions = Action.objects.filter(actor_content_type=self.user_ct, |
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actor_object_id=self.user1.id) |
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actions = lambda: _actions._clone() |
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num_content_types = len(set(actions().values_list( |
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'target_content_type_id', flat=True))) |
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n = actions().count() |
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59
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# compare to fetching only 1 generic relation |
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full, generic = actions(), actions().fetch_generic_relations('target') |
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self.assertNumQueries(LTE(n + 1), |
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lambda: [a.target for a in full]) |
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self.assertNumQueries(LTE(num_content_types + 2), |
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lambda: [a.target for a in generic]) |
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action_targets = [(a.id, a.target) for a in actions()] |
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action_targets_fetch_generic = [ |
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(a.id, a.target) |
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for a in actions().fetch_generic_relations('target')] |
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self.assertEqual(action_targets, action_targets_fetch_generic) |
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# compare to fetching all generic relations |
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num_content_types = len(set(sum(actions().values_list( |
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'actor_content_type_id', 'target_content_type_id'), ()))) |
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full, generic = actions(), actions().fetch_generic_relations() |
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self.assertNumQueries(LTE(2 * n + 1), |
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lambda: [(a.actor, a.target) for a in full]) |
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self.assertNumQueries(LTE(num_content_types + 2), |
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lambda: [(a.actor, a.target) for a in generic]) |
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81
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action_actor_targets = [(a.id, a.actor, a.target) for a in actions()] |
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action_actor_targets_fetch_generic_all = [ |
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(a.id, a.actor, a.target) |
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for a in actions().fetch_generic_relations()] |
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self.assertEqual(action_actor_targets, |
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action_actor_targets_fetch_generic_all) |
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# fetch only 1 generic relation, but access both gfks |
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generic = lambda: actions().fetch_generic_relations('target') |
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self.assertNumQueries(LTE(n + num_content_types + 2), lambda: [ |
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(a.actor, a.target) for a in generic()]) |
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action_actor_targets_fetch_generic_target = [ |
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(a.id, a.actor, a.target) for a in generic()] |
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self.assertEqual(action_actor_targets, |
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action_actor_targets_fetch_generic_target) |
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96
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justquick /
django-activity-stream
