_new_publishable = models.NullBooleanField(editable=False)
_published = models.NullBooleanField(editable=False)
_on_track = models.IntegerField(null=True, blank=True, db_index=True, editable=False)
- dc_cover_image = models.ForeignKey(Image, blank=True, null=True, db_index=True, on_delete=models.SET_NULL)
+ dc_cover_image = models.ForeignKey(Image, blank=True, null=True,
+ db_index=True, on_delete=models.SET_NULL, editable=False)
dc_slug = models.CharField(max_length=128, null=True, blank=True,
editable=False, db_index=True)