Django form validation: making “required” conditional?

Question

I\'m new to Django (and Python), and am trying to figure out how to conditionalize certain aspects of form validation. In this case, there\'s a HTML interface to the applica

Answer 1

I found myself needing a "standard" way to do this, as my forms have several conditionally required fields. So I created a superclass with the following method:

def validate_required_field(self, cleaned_data, field_name, message="This field is required"):
    if(field_name in cleaned_data and cleaned_data[field_name] is None):
        self._errors[field_name] = self.error_class([message])
        del cleaned_data[field_name]

And then in my form's clean method I have:

def clean(self):
    cleaned_data = super(FormClass, self).clean()
    if(condition):
        self.validate_required_field(cleaned_data, 'field_name')

It's worked perfectly for me so far.