[Webwork-user] Where should validation happen?

[Francisco H. <fhe...@fh...>]

I've been wondering, where should validation happen?
both domain type checking (ie: valid integer, valid phone number, valid
date) and other business type checking (ie: this user does infect belong to
this group, this item can be added to the cart)

I've seen doValidation() but that doesnt seem to work with CommandDriven
interface (although I was thinking for some kind of method to to call
doCreateValidation() when doCreate() command is run or maybe in actions.xml
having a validator attribute that specifies the method to be called when the
command is run)

right now ive just validating data in my action methods (ie: doCreate()
contains all of the validation code), another thing i was thinking about was
doing the domain type checking inside the parameter setters (ie: setUser()
checks that the User is valid)

I'd like to hear what methods of validation you guys are using..