关于django：python单元测试：对抛出AssertionError的相同对象的assertEqual

python unit test: assertEqual on same objects throwing AssertionError

我有一个班

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class PlaylistManager(models.Manager):
def add_playlist(self, name):
playlist = Playlist(name=name)
playlist.save()
return playlist

def get_playlist_with_id(self, id):
return super(PlaylistManager, self).get_query_set().filter(pk=id)

class Playlist(models.Model):
name = models.CharField(max_length=30)
date_created = models.DateTimeField(auto_now_add=True)
date_modified = models.DateTimeField(auto_now=True)
deleted = models.BooleanField(default=False)
objects = PlaylistManager() # is a customer manager

def __repr__(self):
return '<Playlist name:%s, date_created:%s, date_modified:%s, deleted:%s>' % \
(self.name, self.date_created, self.date_modified, self.deleted)

class Meta:
db_table = 'playlists'

我把1〔0〕作为

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def test_get_playlist(self):
playlist = Utility.add_playlist()
self.assertEqual(Playlist.objects.get_playlist_with_id(playlist.id), playlist)

class Utility():
@staticmethod
def add_playlist(playlist_name=PLAYLIST):
return Playlist.objects.add_playlist(playlist_name)

当我运行测试时，我将错误视为

1	AssertionError: [<Playlist name:playlist, date_created:2012-07-18 19:54:12.265909+00:00, date_modified:2012-07-18 19:54:12.265955+00:00, deleted:False>] != <Playlist name:playlist, date_created:2012-07-18 19:54:12.265909+00:00, date_modified:2012-07-18 19:54:12.265955+00:00, deleted:False>

即使两个对象相同。

我这里有什么东西不见了吗？