Robert Morley wrote: > > On Apr 23, 2010, at 5:18 PM, Adam Heath wrote: > >> Adrian Crum wrote: >>> --- On Fri, 4/23/10, Robert Morley <[email protected]> wrote: >>>> +1 - I think properly modeling the >>>> field using the required-field attribute makes perfect >>>> sense. I would think our html form renderer >>>> implementation should probably just apply a class "required" >>>> at render time and the visual should be handled by css. >>> >>> I believe I was the one who introduced the required CSS class and >>> that was my reasoning - have the style sheet determine what a >>> required field looks like. >>> >>> At the time, the asterisk was being used to indicate a required >>> field. The problem was, most forms didn't have an explanation as to >>> what the asterisk meant. So the result looked odd. >>> >>> No "best practice" was discussed or decided upon. I just put the new >>> CSS class in the style sheet and I left it to the community to decide >>> by using it or not. >>> >>> I like the idea of service definitions driving the required fields. >> >> Sure, that would be nice. However, what happens when service A calls >> service B, and service C sometimes dependening on the situation. How >> would you chain the validations, so that no processing code was run in >> A until both B and C were satisified that the data was correct? >> > > I think you would be using the required fields defined by the service > definition of service A which is what the form would be bound to. If > there are optional parameters to service A that are required by service > B (and service B is always called) then service A should have them > marked as required as well. However, if service B is optionally called > itself (based on logic) then without the client duplicating that logic > client-side, the page has no choice but to make those parameters > optional as well.
Validation is more than just a required check. Various fields may be restricted to a certain list of allowed values. This list could change based on other incoming parameters. And copying such validation all over the place would lead to more madness(I have enough of my own).
