Same problem here! The "notnull=True" parameter doesn't append the "NOT NULL" clause for reference fields. The IS_IN_DB function activates the check at form-level while the notnull parameter should set the constraint at db-level.
Same problem here! The "notnull=True" parameter doesn't append the "NOT NULL" clause for reference fields. The IS_IN_DB function activates the check at form-level while the notnull parameter should set the constraint at db-level.