form_valid和form_invalid永遠不會以django的形式調用

Question

from django.contrib.auth.forms import AuthenticationForm 

class LoginForm(AuthenticationForm): 


    def clean(self): 
     logger.debug("LoginForm: clean") 
     cleaned_data = self.cleaned_data 
     mail = cleaned_data.get("username") 
     pwd = cleaned_data.get("password") 
     user = authenticate(username=mail, password=pwd) 

     ... 

     cleaned_data = super(LoginForm, self).clean() 
     return cleaned_data 


    def form_invalid(self, form): 
     logger.debug("LoginForm: form_invalid") 
     return super(LoginForm, self).form_invalid(form) 

    def form_valid(self, form): 
     logger.debug("LoginForm: form_valid") 
     return super(LoginForm, self).form_valid(form) 

方法form_valid和form_invalid永遠不會被調用。但總是調用clean（我看到消息「LoginForm：clean」）。怎麼了？

Answer 1

你很困惑django.forms.Form與django.views.generic.edit.FormView。

form_valid和form_invalid方法都屬於Django的class-based generic view FormView。

該Form類，其中AuthenticationFormextends，有一個is_valid method而不是。