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>

2008-02-18T09:46:29+00:002008-02-18T09:46:29+00:00https://simonwillison.net/2008/Feb/18/changeset/#atom-tag

<p><strong><a href="http://code.djangoproject.com/changeset/7126">queryset-refactor changeset 7126</a></strong></p> Malcolm just checked model inheritance in to the queryset-refactor branch, with full documentation and unit tests. People have been requesting this for ages. <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/python">python</a>, <a href="https://simonwillison.net/tags/querysetrefactor">querysetrefactor</a>, <a href="https://simonwillison.net/tags/testing">testing</a></p>

2008-02-10T15:10:21+00:002008-02-10T15:10:21+00:00https://simonwillison.net/2008/Feb/10/classes/#atom-tag

<p><strong><a href="http://peter.michaux.ca/article/5004">Transitioning from Java Classes to JavaScript Prototypes</a></strong></p> Peter Michaux shows how JavaScript’s prototypal inheritance can run rings around traditional Java-style classes once you figure out how to take advantage of it. <p>Tags: <a href="https://simonwillison.net/tags/inheritance">inheritance</a>, <a href="https://simonwillison.net/tags/java">java</a>, <a href="https://simonwillison.net/tags/javascript">javascript</a>, <a href="https://simonwillison.net/tags/object-oriented-programming">object-oriented-programming</a>, <a href="https://simonwillison.net/tags/pete-michaux">pete-michaux</a>, <a href="https://simonwillison.net/tags/prototypal-inheritance">prototypal-inheritance</a></p>