def test_hasnt_changed_with_different_id(self):
# Both of the child objects have the same field content but have a
# different PK (ID) so they should be detected as separate objects
event_page = EventPage(title="Finals", slug="finals-event-abc")
event_page.head_counts.add(HeadCountRelatedModelUsingPK(
custom_id=1,
head_count=220
))
modified_event_page = EventPage(title="Finals", slug="finals-event-abc")
modified_event_page.head_counts.add(HeadCountRelatedModelUsingPK(
custom_id=2,
head_count=220
))
comparison = self.comparison_class(
EventPage._meta.get_field('head_counts'),
[partial(self.field_comparison_class, HeadCountRelatedModelUsingPK._meta.get_field('head_count'))],
event_page,
modified_event_page,
)
self.assertFalse(comparison.is_field)
self.assertTrue(comparison.is_child_relation)
self.assertEqual(comparison.field_label(), "Head counts")
self.assertTrue(comparison.has_changed())
# Check mapping
objs_a = list(comparison.val_a.all())
objs_b = list(comparison.val_b.all())
map_forwards, map_backwards, added, deleted = comparison.get_mapping(objs_a, objs_b)
self.assertEqual(map_forwards, {})
self.assertEqual(map_backwards, {})
self.assertEqual(added, [0]) # Add new head count
self.assertEqual(deleted, [0]) # Delete old head count
def test_has_changed_with_same_id(self):
# Head Count was changed but the PK of the child object remained the same.
# It should be detected as the same object
event_page = EventPage(title="Semi Finals", slug="semi-finals-2018")
event_page.head_counts.add(
HeadCountRelatedModelUsingPK(
custom_id=1,
head_count=22,
))
modified_event_page = EventPage(title="Semi Finals",
slug="semi-finals-2018")
modified_event_page.head_counts.add(
HeadCountRelatedModelUsingPK(
custom_id=1,
head_count=23,
))
modified_event_page.head_counts.add(
HeadCountRelatedModelUsingPK(head_count=25, ))
comparison = self.comparison_class(
EventPage._meta.get_field('head_counts'),
[
partial(
self.field_comparison_class,
HeadCountRelatedModelUsingPK._meta.get_field('head_count'))
],
event_page,
modified_event_page,
)
self.assertFalse(comparison.is_field)
self.assertTrue(comparison.is_child_relation)
self.assertEqual(comparison.field_label(), 'Head counts')
self.assertTrue(comparison.has_changed())
# Check mapping
objs_a = list(comparison.val_a.all())
objs_b = list(comparison.val_b.all())
map_forwards, map_backwards, added, deleted = comparison.get_mapping(
objs_a, objs_b)
self.assertEqual(map_forwards, {0: 0}) # map head count 22 to 23
self.assertEqual(map_backwards, {0: 0}) # map head count 23 to 22
self.assertEqual(added, [1]) # add second head count
self.assertEqual(deleted, [])