Django表单不调用clean_< fieldname> [英] Django form not calling clean_<fieldname>

问题描述

我正在尝试验证一个表单（以前用于工作）。由于某种原因，当调用form.is_valid（）时，我似乎无法获得诸如clean_username（self）之类的各种清理功能。

我知道还没有足够的支票（他们正在建设中看到;-)），但这里是我的课程：

  class LoginForm（forms.Form）：
 username = forms.CharField（max_length = 30）
 password = forms.CharField（max_length = 
打印清理密码
密码= self.cleaned_data ['密码'] 
如果密码== u：
 raise forms.ValidationError（Password is blank）
返回密码
 
 def clean_username（self）：
 username = self .cleaned_data ['username'] 
如果len（username）< 4：
 raise forms.ValidationError（Username is less than four charecters）
 return username 
 
 
 class RegistrationForm（LoginForm）：
 confirm_password = forms.CharField（widget = forms.PasswordInput，max_length = 30）
 email = forms.EmailField（）
 
 def clean_confirm_password（self）：
打印清除确认密码 
 clean_confirm_password = self.cleaned_data ['confirm_password'] 
如果clean_confirm_password == u：
 raise forms.ValidationError（确认密码为空）
 return clean_confirm_password 
 
 def clean（self）：
 print在注册表单上运行clean
 print self.cleaned_data.items（）
 password = self.cleaned_data ['password '] 
 confirm = self.cleaned_data ['confirm_password'] 
如果password！= confirm：
提交form.ValidationError（'密码不匹配'）
 return self.cleaned_data 
  

谢谢！

解决方案

我潜入Django之后发现错误的来源 forms.py 来源。 >

似乎如果一个字段留空，该表单将在调用 field.clean（）之后为该字段引发ValidationError ，但是它不调用 clean_< fieldname> ，但它仍然调用该类的main clean方法。为了处理使用这些空白字段的干净方法，您必须执行以下操作：

  def clean（self） 
 try：
 password = self.cleaned_data ['password'] 
＃etc 
除了KeyError：
 raise ValidationError（'密码字段为空白'）
 
返回self.cleaned_data 
  

I am attempting to validate a form (and it used to work before). For some reason, I can't seem to get the various cleaning functions such as clean_username(self) to get called when form.is_valid() is called.

I know there are not nearly enough checks yet (they are under construction you see ;-) ), but here are my classes:

  class LoginForm(forms.Form):
    username = forms.CharField(max_length=30)
    password = forms.CharField(max_length=30,widget=forms.PasswordInput)

    def clean_password(self):
        print "Cleaning password"
        password = self.cleaned_data['password']
        if password == u"":
            raise forms.ValidationError("Password is blank.")
        return password

    def clean_username(self):
        username = self.cleaned_data['username']
        if len(username) < 4:
            raise forms.ValidationError("Username is fewer than four charecters.")
        return username


class RegistrationForm( LoginForm ):
        confirm_password = forms.CharField(widget=forms.PasswordInput, max_length=30)
        email = forms.EmailField()

        def clean_confirm_password(self):
            print "Cleaning confirm password"
            clean_confirm_password = self.cleaned_data['confirm_password']
            if clean_confirm_password == u"":
                raise forms.ValidationError("Confirming password is blank.")
            return clean_confirm_password

        def clean(self):
            print "Running clean on a registration form"
            print self.cleaned_data.items()
            password = self.cleaned_data['password']
            confirm = self.cleaned_data['confirm_password']
            if password != confirm:
                raise forms.ValidationError('Passwords do not match.')
            return self.cleaned_data

Thank you!

解决方案

I discovered the source of the error after diving into the Django forms.py source.

It seems that if a field is left blank, the form raises a ValidationError for that field after calling field.clean(), but it then does not call clean_<fieldname>, but it still calls the main clean method of the class. In order to deal with a clean method that uses those blank fields you have to do the following:

def clean(self):
    try:
        password = self.cleaned_data['password']
        # etc
    except KeyError:
        raise ValidationError('The password field was blank.')

    return self.cleaned_data

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