Hello.
How to raise a `ValidationException` in the models `clean` method?
def clean(self):
from django.core.exceptions import ValidationError
raise ValidationError({'title': 'not ok'})
The above does not add the error to the `title` field (when using a form),
but to the non field errors.
This is possible inside a form (`self._errors['title'] =
self.error_class([msg])`), but `self._errors` does not exist inside the
models `clean` method.
I know that clean normally is for non field errors, but there are cases
when only some kind of combination of values in separate fields are valid.
I want to directly associate the error with a field and let the user know
"if you change this field than everything passes".
Is it possible (even if not recommended)?
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