Thanks, It works. I've searched it on http://web2py.com/book/default/section/7/4
On 6月4日, 下午1時47分, Yarko Tymciurak <[email protected]> wrote: > On Jun 3, 11:31 pm, dlin <[email protected]> wrote: > > > There is a field which I want user to enter different answer, or just > > keep in empty. > > empty, or unique answer: > > db.table.answer.requires=IS_NULL_OR( IS_NOT_IN_DB( db, > 'table.answer' ) ) > > > > > > > I've tried by: > > > db.table.field.requires=IS_NOT_IN_DB(db, 'table.field') > > > But, it will failed, if the second empty field entered. > > > How could I do the validation for this case? > > Is there any method?
