如何将参数传递给Django的PasswordChangeForm的__init__函数 - python

尝试在Django中访问我的PasswordChangeView时出现TypeError。错误是:

Django Version: 1.7.3
Exception Type: TypeError
Exception Value:    
__init__() missing 1 required positional argument: 'user'
Exception Location: /usr/local/lib/python3.4/dist-packages/django/views/generic/edit.py in get_form, line 45
Python Executable:  /usr/bin/python3.4

我找不到从https://docs.djangoproject.com/en/1.7/_modules/django/contrib/auth/forms/#PasswordChangeForm加载提供的PasswordChangeForm的FormView的示例

这是我尝试执行的操作，但是即使进行了一些调整，仍然会遇到错误。

urls.py

url(r'^password/change/$', login_required(views.PasswordChangeView.as_view()), name='change_password'),

views.py

class PasswordChangeView(FormView):
    template_name = 'change_password.html'
    form_class = PasswordChangeForm

    def dispatch(self, request, *args, **kwargs):
        try:
            self.initial['user'] = self.request.user
        except AttributeError:
            raise Http404

        return super(PasswordChangeView, self).dispatch(request, *args, **kwargs)

我不确定为什么仍然出现此错误。如果查看使用FormView扩展的FormMixin，则会看到以下内容:

def get_form(self, form_class):
    """
    Returns an instance of the form to be used in this view.
    """
    return form_class(**self.get_form_kwargs())

def get_form_kwargs(self):
    """
    Returns the keyword arguments for instantiating the form.
    """
    kwargs = {
        'initial': self.get_initial(),
        'prefix': self.get_prefix(),
    }

    if self.request.method in ('POST', 'PUT'):
        kwargs.update({
            'data': self.request.POST,
            'files': self.request.FILES,
        })
    return kwargs

还有...

def get_initial(self):
    """
    Returns the initial data to use for forms on this view.
    """
    return self.initial.copy()

资料来源:https://github.com/django/django/blob/master/django/views/generic/edit.py

我通过调用self.get_form_kwargs()确认self.initial包含用户:

{'initial': {'user': <SimpleLazyObject: <User: maaack>>}, 'prefix': None}

我还应该如何将用户传递到表单中？

python大神给出的解决方案

您应该将用户作为第一个参数传递给表单构造函数。查看SetPasswordForm.__init__():

def get_form(self, form_class):
    return form_class(self.request.user, **self.get_form_kwargs())

user中没有PasswordChangeForm字段，因此user中的initial键是无用的。