Added check_field_is_empty decorator to cleaning.py. This makes sure the cleaning checks are skipped when a field is empty. Note that Djanog will raise it's own ValidationError when a required field is empty before attempting to clean it. Patch by: Lennard de Rijk Reviewed by: to-be-reviewed.

from django.core.management.base import NoArgsCommand

class Command(NoArgsCommand):
    help = "Validates all installed models."

    requires_model_validation = False

    def handle_noargs(self, **options):
        self.validate(display_num_errors=True)