Django注册视图：类型错误：“set”对象不是subscriptab

Question

我在django上的web应用程序在注册时遇到了一个错误，输入了不同的密码。所有其他表单错误都很好，包括电子邮件、空字段等等。验证注册表单时出错。在

我真的不明白我为什么会有这个错误，因为它不受我的代码的影响（我猜）。在

以下是回溯：

Traceback (most recent call last):
  File "/home/kotofey/AccentAcademy/aaenv/lib/python3.6/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/home/kotofey/AccentAcademy/aaenv/lib/python3.6/site-packages/django/core/handlers/base.py", line 126, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/home/kotofey/AccentAcademy/aaenv/lib/python3.6/site-packages/django/core/handlers/base.py", line 124, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/kotofey/AccentAcademy/registration/views.py", line 44, in signup
    if form.is_valid():
  File "/home/kotofey/AccentAcademy/aaenv/lib/python3.6/site-packages/django/forms/forms.py", line 185, in is_valid
    return self.is_bound and not self.errors
  File "/home/kotofey/AccentAcademy/aaenv/lib/python3.6/site-packages/django/forms/forms.py", line 180, in errors
    self.full_clean()
  File "/home/kotofey/AccentAcademy/aaenv/lib/python3.6/site-packages/django/forms/forms.py", line 381, in full_clean
    self._clean_fields()
  File "/home/kotofey/AccentAcademy/aaenv/lib/python3.6/site-packages/django/forms/forms.py", line 402, in _clean_fields
    value = getattr(self, 'clean_%s' % name)()
  File "/home/kotofey/AccentAcademy/aaenv/lib/python3.6/site-packages/django/contrib/auth/forms.py", line 101, in clean_password2
    self.error_messages['password_mismatch'],
TypeError: 'set' object is not subscriptable

Answer 1

看起来，在第44行呈现的任何形式都有一个error_messages属性，该属性属于set类型，而不是某种可订阅类型（如dict）。在

因此，您定义了一个具有错误类型的error_messages属性的表单。在

如果您检查表单实例的代码（无论它是在哪里定义的），您很可能会发现“bad”error_messages属性。在

您也可以尝试加载表单并检查一下：

$./manage.py shell
>>>> from some.app.forms import SomeFormClass
>>>> f = SomeFormClass()
>>>> type(f.error_messages)