def test_staged_edits_new(self):
with revision:
queen = Artist(name='Queen')
queen.save()
a_kind_of_magic = Album(artist=queen, title='A Kind of Magic')
a_kind_of_magic.save()
dont_lose_your_head = Song(album=a_kind_of_magic, title="Don't Lose Your Head")
dont_lose_your_head.save()
princes_of_the_universe = Song(album=a_kind_of_magic, title='Princes of the Universe')
princes_of_the_universe.save()
original_lyrics = Lyrics(song=princes_of_the_universe, text="Dont lose your head")
original_lyrics.stage()
first_revision = revision.latest_transactions['default']
with revision:
original_lyrics.song = dont_lose_your_head
original_lyrics.stage()
second_revision = revision.latest_transactions['default']
# Verify that the lyrics object does not exist from the published perspective.
self.assertRaises(Lyrics.DoesNotExist, Lyrics.objects.get, pk=original_lyrics.pk)
# Vefify that the the published Song object does not know that the new lyrics exist.
self.assertEquals(list(Song.objects.get(pk=princes_of_the_universe.pk).lyrics.all()), [])
# Verify that the first staged version of the Song object knows that the lyrics exist.
self.assertEquals(list(Song.objects.version(first_revision).get(pk=princes_of_the_universe.pk).lyrics.all()), [original_lyrics])
# Verify that the first staged version of the Song object knows that the lyrics exist.
self.assertEquals(list(Song.objects.version(first_revision).get(pk=dont_lose_your_head.pk).lyrics.all()), [])
# Verify that the second staged version of the Song object knows that the lyrics do not exist because they were altered to point to the correct song.
self.assertEquals(list(Song.objects.version(second_revision).get(pk=princes_of_the_universe.pk).lyrics.all()), [])
# Verify that the second staged version of the Song object knows that the lyrics do not exist because they were altered to point to the correct song.
self.assertEquals(list(Song.objects.version(second_revision).get(pk=dont_lose_your_head.pk).lyrics.all()), [original_lyrics])
with revision:
original_lyrics.commit()
third_revision = revision.latest_transactions['default']
self.assertEquals(Lyrics.objects.get(pk=original_lyrics.pk), original_lyrics)
