id,summary,reporter,owner,description,type,status,component,version,severity,resolution,keywords,cc,stage,has_patch,needs_docs,needs_tests,needs_better_patch,easy,ui_ux 7911,Model Inheritance still doesn't work in the admin.,atomax,Brian Rosner,"Ticket #6755 was supposed to update newforms-admin to support model inheritance (as per queryset-refactor). All of this has been merged to trunk and ticket #6755 has been closed. Still, model inheritance does not work in the admin. There is an error thrown up as follows (seen in 1.0-alpha-SVN-8061): {{{ Exception at /admin/news/review/33/ has no ForeignKey to Request Method: GET Request URL: http://localhost:80000/admin/news/review/33/ Exception Type: Exception Exception Value: has no ForeignKey to Exception Location: c:\usr\django\trunk\django\forms\models.py in _get_foreign_key, line 454 }}} In fact, Comment has a foreign key to Item and Review is a subclass of Item, so the foreign key should be inherited. This is the case, because it can be accessed in the shell. But the admin interface cannot find it. Here is the relevant code: {{{ model.py ======== class Item(models.Model): title = models.TextField(null=True, blank=True) class Comment(models.Model): item = models.ForeignKey(Item, related_name='comments', null=True, blank=True) text = models.TextField(null=True, blank=True) class Review(Item): text = models.TextField(null=True, blank=True) class Announcement(Item): text = models.TextField(null=True, blank=True) admin.py ======== class CommentInline(admin.StackedInline): model = Comment extra = 1 class ItemOptions(admin.ModelAdmin): model = Item inlines = [CommentInline] class ReviewOptions(admin.ModelAdmin): model = Review inlines = [CommentInline] class AnnouncementOptions(admin.ModelAdmin): model = Announcement inlines = [CommentInline] admin.site.register(Comment) admin.site.register(Item, ItemOptions) admin.site.register(Review, ReviewOptions) admin.site.register(Announcement, AnnouncementOptions) }}}",,closed,contrib.admin,dev,,duplicate,"admin interface, model inheritance",,Unreviewed,0,0,0,0,0,0