Its all good. Just checking. Thanks for the help Niphlod. On Monday, August 22, 2016 at 5:11:17 PM UTC-4, Ron Chatterjee wrote: > > What I want is allowing user to put limited string but they can't submit > the form with an empty field. > > requires = IS_EMPTY_OR([IS_LENGTH(8), IS_NOT_EMPTY()] ) > > That don't work. Obviously not because its conflicting. Right? In one hand > I am saying empty or insert value (8) and then saying can't be empty. Do we > have any other validators that I can try which takes those two arguments? > > On Monday, August 22, 2016 at 4:06:03 PM UTC-4, Niphlod wrote: >> >> to my knowledge, the general rule for validators is that if you have >> multiple requirements, you should pass a list. >> That being said, the are "special" validator, like IS_EMPTY_OR, that take >> a validator as an argument. >> >> Goes without saying (it quite translates well), that >> IS_EMPTY_OR(IS_LENGTH(8)) EITHER accepts nothing or a string shorter than 8 >> chars. >> Now, the "deal". How would you consider a field in a form that is not >> filled ? None or '' ? >> >> IS_NOT_EMPTY() prevents an empty input. >> >> it's not clear what you want, but I guess something got cleared with my >> previous comments. >> Also, validators ONLY apply when you use them: forms, >> validate_and_insert(), validate_and_update(), etc. Using validators only is >> perfectly fine if you let the app validate each and every input. >> length=123 enforces the underlying column to be of that length, but if >> you want meaningful errors, you need to use validators anyways. >> >> On Monday, August 22, 2016 at 5:54:29 PM UTC+2, Ron Chatterjee wrote: >>> >>> In other words, if I do this: >>> >>> IS_EMPTY_OR(IS_LENGTH(8)) >>> >>> It prevents longer length string but the empty field is inserted as >>> None. I want to prevent both. >>> >>> >>> On Monday, August 22, 2016 at 10:54:08 AM UTC-4, Ron Chatterjee wrote: >>>> >>>> Two question, if you don't mind. >>>> >>>> (1) requires = IS_NOT_EMPTY(IS_LENGTH(64)) Or requires = >>>> IS_EMPTY_OR(IS_LENGTH(64)) Doesn't work. In other words, if I want to >>>> limit >>>> the string field entry but also want requires not empty, how to go about >>>> it? >>>> >>>> (2) for my sql, do I still need length = 64 (or 255 etc)? Its redundant >>>> when I define IS_LENGTH(64) or do I need both? >>>> >>>> >>>> >>>> >>>> On Monday, August 22, 2016 at 7:49:42 AM UTC-4, Niphlod wrote: >>>>> >>>>> requires=IS_LENGTH(64) will limit insertion upon validation. the >>>>> "length" attribute gets translated, wherever possibile, to >>>>> backend-specific >>>>> syntaxes. >>>>> >>>>> On Sunday, August 21, 2016 at 4:21:22 AM UTC+2, [email protected] >>>>> wrote: >>>>>> >>>>>> How we limit string length in DAL? It seems length = 64 doesn't work. >>>>>> >>>>>
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