Are you sure your DB has been synced after putting the ForeignKey(News) in your Department model? Can you post somewhere the following models: News, OldNews, Department?
Regards, Leo Leonardo Giordani Author of The Digital Cat <http://lgiordani.github.com> My profile on About.me <http://about.me/leonardo.giordani> - My GitHub page<https://github.com/lgiordani>- My Coderwall profile <https://coderwall.com/lgiordani> 2013/10/2 Roberto López López <roberto.lo...@uni.no> > 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. > -- 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/CAEhE%2BOkqZkwyR92m3DZATfoCA9bMVm8mT387oqw%3DM66F6-8EQw%40mail.gmail.com. For more options, visit https://groups.google.com/groups/opt_out.
