http://simonwillison.net/2008-04-12T12:54:51+00:00Simon Willison2008-04-12T12:54:51+00:002008-04-12T12:54:51+00:00https://simonwillison.net/2008/Apr/12/django/#atom-tag

<p><strong><a href="http://www.djangosnippets.org/snippets/703/">Multiple inheritance of newforms and modelforms</a></strong></p> If you ever see “Error when calling the metaclass bases metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases” when trying multiple inheritance with newforms and modelforms, here’s a scary solution I found. <p>Tags: <a href="https://simonwillison.net/tags/django">django</a>, <a href="https://simonwillison.net/tags/inheritance">inheritance</a>, <a href="https://simonwillison.net/tags/metaclasses">metaclasses</a>, <a href="https://simonwillison.net/tags/modelforms">modelforms</a>, <a href="https://simonwillison.net/tags/multipleinheritance">multipleinheritance</a>, <a href="https://simonwillison.net/tags/newforms">newforms</a>, <a href="https://simonwillison.net/tags/python">python</a></p>