擅长:python、mysql、java
<p>Django 1.7在提交<a href="https://github.com/django/django/commit/b16dd1fe019b38d0dcdf4a400e9377fb06b33178">b16dd1fe019</a>以获得票证<a href="https://code.djangoproject.com/ticket/8620">#8620</a>时解决了这个问题。在Django 1.7中,可以按照OP的建议在子类中执行<code>nickname = None</code>。从提交中的文档更改:</p>
<blockquote>
<p>It's possible to opt-out from a <code>Field</code> inherited from a parent class by shadowing it. While any non-<code>Field</code> value works for this purpose, it's recommended to use <code>None</code> to make it explicit that a field is being nullified.</p>
</blockquote>