Method validate_unique

django/db/models/base.py:1450–1464

Check unique constraints on the model and raise ValidationError if any failed.

(self, exclude=None)

        pass

    def validate_unique(self, exclude=None):
        """
        Check unique constraints on the model and raise ValidationError if any
        failed.
        """
        unique_checks, date_checks = self._get_unique_checks(exclude=exclude)

        errors = self._perform_unique_checks(unique_checks)
        date_errors = self._perform_date_checks(date_checks)

        for k, v in date_errors.items():
            errors.setdefault(k, []).extend(v)

        if errors:
            raise ValidationError(errors)

    def _get_unique_checks(self, exclude=None, include_meta_constraints=False):
        """