I have a model that looks like the following:

class LibraryEntry(models.Model):
  host_lib_song_id = models.IntegerField()
  song = models.CharField(max_length=200)
  artist = models.CharField(max_length=200)
  album = models.CharField(max_length=200)
  owning_user = models.ForeignKey(User)
  is_deleted = models.BooleanField(default=False)

Now, if I so a select where is_deleted=False, the combination of host_lib_song_id and owning_user should be unique. How can I express this?

python django model
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