Hi, I am extending a 3rd party model in my application, using multi-table inheritance. I can create an instance and modify it, but when I try to list the created objects at http://localhost:8000/en/admin/news/news/ , I am getting a nice exception:
Traceback: File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response 140. response = response.render() File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/template/response.py" in render 105. self.content = self.rendered_content File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/template/response.py" in rendered_content 82. content = template.render(context) File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/template/base.py" in render 140. return self._render(context) File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/template/base.py" in _render 134. return self.nodelist.render(context) File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/template/base.py" in render 830. bit = self.render_node(node, context) File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/template/debug.py" in render_node 74. return node.render(context) File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/template/loader_tags.py" in render 124. return compiled_parent._render(context) File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/template/base.py" in _render 134. return self.nodelist.render(context) File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/template/base.py" in render 830. bit = self.render_node(node, context) File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/template/debug.py" in render_node 74. return node.render(context) File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/template/loader_tags.py" in render 124. return compiled_parent._render(context) File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/template/base.py" in _render 134. return self.nodelist.render(context) File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/template/base.py" in render 830. bit = self.render_node(node, context) File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/template/debug.py" in render_node 74. return node.render(context) File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/template/loader_tags.py" in render 63. result = block.nodelist.render(context) File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/template/base.py" in render 830. bit = self.render_node(node, context) File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/template/debug.py" in render_node 74. return node.render(context) File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/template/loader_tags.py" in render 63. result = block.nodelist.render(context) File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/template/base.py" in render 830. bit = self.render_node(node, context) File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/template/debug.py" in render_node 74. return node.render(context) File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/template/base.py" in render 1185. _dict = func(*resolved_args, **resolved_kwargs) File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/contrib/admin/templatetags/admin_list.py" in result_list 286. 'results': list(results(cl))} File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/contrib/admin/templatetags/admin_list.py" in results 264. yield ResultList(None, items_for_result(cl, res, None)) File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/contrib/admin/templatetags/admin_list.py" in __init__ 256. super(ResultList, self).__init__(*items) File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/contrib/admin/templatetags/admin_list.py" in items_for_result 219. url = cl.url_for_result(result) File "/home/roberto/.virtualenvs/ve_news/local/lib/python2.7/site-packages/django/contrib/admin/views/main.py" in url_for_result 380. pk = getattr(result, self.pk_attname) Exception Type: AttributeError at /en/admin/news/news/ Exception Value: 'News' object has no attribute 'news_ptr_id' My News model is extending another model using multiple table inheritance. class News(OldNews): departments = models.ManyToManyField(Department, blank=True, related_name='news') objects = models.Manager() class Meta: verbose_name_plural = _('news') ordering = ('-pub_date', ) I can't understand the reason for this error. Can anyone enlighten me please? Roberto -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscr...@googlegroups.com. To post to this group, send email to django-users@googlegroups.com. Visit this group at http://groups.google.com/group/django-users. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/524C159D.8020201%40uni.no. For more options, visit https://groups.google.com/groups/opt_out.