Method _update_errors

django/forms/models.py:446–477

(self, errors)

        return self.cleaned_data

    def _update_errors(self, errors):
        # Override any validation error messages defined at the model level
        # with those defined at the form level.
        opts = self._meta

        # Allow the model generated by construct_instance() to raise
        # ValidationError and have them handled in the same way as others.
        if hasattr(errors, "error_dict"):
            error_dict = errors.error_dict
        else:
            error_dict = {NON_FIELD_ERRORS: errors}

        for field, messages in error_dict.items():
            if (
                field == NON_FIELD_ERRORS
                and opts.error_messages
                and NON_FIELD_ERRORS in opts.error_messages
            ):
                error_messages = opts.error_messages[NON_FIELD_ERRORS]
            elif field in self.fields:
                error_messages = self.fields[field].error_messages
            else:
                continue

            for message in messages:
                if (
                    isinstance(message, ValidationError)
                    and message.code in error_messages
                ):
                    message.message = error_messages[message.code]

        self.add_error(None, errors)

    def _post_clean(self):
        opts = self._meta