How do you make django form validation dynamic?

Question

I have a form that needs to have either a valid url or a valid file for uploading:

class ResourceUpload(ModelForm):
   ...        
   uploadedfile = forms.Fi         


        

Answer 1

Here's my solution which really works... (tested)

def __init__(self, *args, **kwargs):
    super(YourForm, self).__init__(*args, **kwargs)

    if self.data and self.data.get('field_name') != 'SOMETHING':
        self.fields.get('field_name2').required = True

This makes field_name2 a required field if field_name's input was not 'SOMETHING'. Django rocks!