Re: How to determine specific rule that was triggered on validation?

You probably have to use a combination of defining your validation
rules according to the CakePHP book at:
http://book.cakephp.org/view/1151/Multiple-Rules-per-Field

and then use the models invalidFields method to pass the errors on to
the view, so that you may discern which error rule is being reported.
Enjoy,
John

On 22 Feb., 05:11, "O.J. Tibi" <ojt...@gmail.com> wrote:
> Hi all,
>
> I need some ideas on this one. We all know pretty well that a model
> gathers messages from failing validation rules whenever it performs
> validations, and these messages can be retrieved using $Model->invalidFields(). I was thinking, what if I wanted to check if a
>
> particular validation rule was triggered for this field that I'm
> interested in? Would there be a way to check that this rule was
> triggered without relying on the validation messages?
>
> Let's say I have a registration form. I have a User.username field
> that has some few validation rules (not empty, between range, valid
> characters, no duplicates, etc.) but I'm particularly interested if
> the "no duplicates" rule was triggerred on validation. In a component,
> whenever the "no duplicates" field is triggered, the component will
> inject a "username suggestion helper" into the parent controller.
>
> The reason why we should not determine if a particular rule was
> triggered using the validation messages, is because these messages
> (that are displayed to the user) may be changed in the application,
> depending on the requirements. These messages are also translated
> according to the user's current locale, so comparing a validation
> message that may change in the application's lifetime to its
> Gettext'ed counterpart is not viable.
>
> Would it be possible to mimic the $Model->invalidFields() method to
> return constant "error codes" or "error ids" (alphanumeric, hashed,
> numeric, prefixed, or any other flavor you like to site as an example)
> that would not change even if the associated validation messages
> change? If so, what's your recommendation on how to wire this
> functionality into the model so I can check it after validation
> failures?
>
> Thanks,
> OJ

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