Allow empty reference field in form without IS_EMPTY_OR() validator, avoiding constraint violation exception
Allow empty reference field in form without IS_EMPTY_OR() validator, avoiding constraint violation exception

willimoa/pydal,web2py/pydal,michele-comitini/pydal,niphlod/pydal,stephenrauch/pydal,manuelep/pydal,kmcheung12/pydal