UpdateView导致错误“__init __（）至少需要2个参数（给定1个）”

Question

我尝试了很多案例来解决这个错误＆＃34; init （）至少需要2个参数（给定1个）＆＃34;但一直无法解决它。

注意：我使用的是Django的默认身份验证用户模型，数据库是MySQL。

URLS.PY

url(r'^change-password$', ChangePasswordView.as_view()),

FORMS.PY

class PasswordChangForm(forms.Form):
    new_password1 = forms.CharField(max_length=20,required=True)
    new_password2 = forms.CharField(max_length=20,required=True)


    def __init__(self, user, *args, **kwargs):
        self.user = user
        super(PasswordChangForm, self).__init__(*args, **kwargs)

    def clean(self):
        try:
            print self.cleaned_data.get('new_password1')
            print self.cleaned_data.get('new_password2')
            password1 = self.cleaned_data.get('new_password1')
            password2 = self.cleaned_data['new_password2']
            if password1 and password2:
                if password1 != password2:
                    raise forms.ValidationError('password_mismatch')
                else:
                    try:
                        print "tryyy.."
                        print self.user
                        user = User.objects.get(username=self.user)
                        user.set_password(self.cleaned_data.get('new_password1'))
                        user.save()
                        return user
                    except User.DoesNotExist:
                        return forms.ValidationError('Oops Some thing went Wrong..')
        except KeyError:
            raise forms.ValidationError('The password field was blank.')

VIEWS.PY

class ChangePasswordView(UpdateView):
    template_name = 'people/change_password.html'
    form_class = PasswordChangForm
    model = User

#When I use get_form, it prevents __init__ error. But in the forms.py "clean" method is never calling. This results no validation and not saving data in the DB
'''def get_form(self, form_class):
    print "iam in getform..."
    return form_class(self.request.user)'''

def get_object(self):
    return User.objects.get(username=self.request.user)


'''def dispatch(self, request, *args, **kwargs):
    return super(YourView, self).dispatch(request, *args, **kwargs)'''

def get_success_url(self):
    print "get_success_url"
    print self.request.user
    return '/welcome'

def form_valid(self, form):
    print "valid"
    #instance = form.save(commit=False)
    #instance.user = self.request.user
    return super(ChangePasswordView, self).form_valid(form)

def form_invalid(self,form):
    print "form_invalid"
    print form.errors
    return super(ChangePasswordView, self).form_invalid(form)

有谁可以帮我理解我做错了什么？

Answer 1

我认为您的问题出在此处:(在get_form方法中）

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

应该是

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

同样覆盖post方法（来自评论部分）：

class ChangePasswordView(UpdateView):
     ....
     def post(self, request,  *args, **kwargs):
           form= self.form_class(request.POST)
           if form.is_valid():
               #do something
           else:
               #raise error
           return super(ChangePasswordView, self).post(request, *args, **kwargs)