What I want is allowing user for 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 with 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, billy...@gmail.com >>>> wrote: >>>>> >>>>> How we limit string length in DAL? It seems length = 64 doesn't work. >>>>> >>>> -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
