Question

I was trying to add some custom error messages to a form like this one:

class RegistrationForm(forms.ModelForm):

    class Meta:
        model = User  
        fields = ('email',)

    extra_field = forms.CharField(error_messages={
        'required':'Este campo es requerido'
    })     

I have no problem adding custom error messages to a field that is declared in the form (extra_field), but I’m having trouble adding custom error messages to the fields inherited from the model User via meta class (email).

What I really want is to customize all the error messages of this form. Also, I would like to display them in spanish, not english.

So far I have not found any documentation about how to customize the form fields inherited from the model User, I don’t really want to write a new form just because of the error messages.

Thanks in advance!!!

PD: I’m using Django 1.4 and python 2.6.6 in a debian squeeze box.

Answer 1

Ok guys, thank you all for your answers, in fact you helped me a lot!!!

I solved the problem like this:

Suposse I have this form:

class RegistrationForm(forms.ModelForm):

  class Meta:
    model = User  
    fields = ('username', 'email')

And I want to add custom error messages to the username field, but I don’t want to loose all the validation that already comes with that field.

I added this method to my RegistrationForm class:

def clean_username(self):
    data = self.cleaned_data

    # My extremely important validation.
    if len(data['username']) == 5:

      self.fields['username'].error_messages["myerror"] = "The important message"
      raise forms.ValidationError(self.fields['username'].error_messages["myerror"])

    return data['username']

The advantage of this aproach is that I don’t loose the other validation checks that already come with the field in question.

This is important because now I don’t have to validate that the user already exists in my database.

Thanks for your responses, have a good day!!!