Django field required in a clean method in a form class

I want to redefine the required attribute for a field in a clean method of my form file:

class NewUserFullForm(NewUserForm):

REGEX_PHONE = '^(\+[0-9]{2})[ \.\-]?[0-9][ \.\-]?[0-9]{2}[ \.\-]?[0-9]{2}[ \.\-]?[0-9]{2}[ \.\-]?[0-9]{2}$'

phone = forms.RegexField(REGEX_PHONE, help_text='Ex : +33 1 34 12 52 30')
fax = forms开发者_JS百科.RegexField(REGEX_PHONE, help_text='Ex : +33 1 34 12 52 30',  required=False)
gsm = forms.RegexField(REGEX_PHONE, help_text='Ex : +33 6 34 12 52 30',  required=False)

def clean(self):
   if self.cleaned_data["asso_waldec"] == True:
      self.fields['phone'].required = True

But my clean method doesn't work

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Hey! Have you looked at htis document/examples:

Django Validation

Maybe this will clear it up.

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One problem is that the clean function has to return the full collection of cleaned data (see docs). Rather than changing the 'required' attribute I believe you should do the check to see if 'phone' is blank and raise a 'ValidationError' describing the problem.

Also since your form inherits from 'NewUserForm' you should call super(NewUserFullForm, self).clean() to ensure that the inherited fields are cleaned as well.