[Catalyst] Form validation in insert() and update()?

[Peter Karman]

mla scribbled on 05/15/07 13:42:
> Perrin Harkins wrote:
>
> And where do you handle the validation? Only in the controller or in
> both the model and controller?
> 
> Could you give a short example of taking an actual field from the 
> request parameters, validating it, and updating a row with it?
> 
> 

You can see an example of this with Rose::DB::Object, 
Rose::HTML::Objects and the db (sqlite in this case) at:

http://search.cpan.org/src/KARMAN/Catalyst-Controller-Rose-0.02/t/examples/CatRose/

Basically, the form object validates and spits back friendly errors 
messages to the user. If for some reason the data makes it to the ORM 
(RDBO) level, the data is also validated there and 500 error returned to 
the user. Finally, the db itself has contraints on it that should 
validate in consistent ways with the form and the ORM.

This pattern seems to be similar to what mst, Perrin and Bill are also 
describing.

-- 
Peter Karman  .  http://peknet.com/  .  peter at peknet.com