Django Form Validation

Question

Is it possible to add form errors (not a field specific errors) to a form that is already validated (form.is_valid() is already called and the result is True)?

I have additional validation logic (with database requests) which I prefer to execute after standard form validation is passed, but it will be better to associate new errors with form

Or maybe I have to call this additional validation within clear() form function?

Answer 1

Try to check it in the clean method of the form after all, but check existing errors before. Like that..

clean(self):
    ...
    ...
    if not self._errors:
        # your extra check

Answer 2

If this is validation based on database requests, then it shound as model validation.