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Field validation?

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Boris Popov, DeepCove Labs (SNN)

Field validation?

Morning,

The round of questioning continues. How would I go about doing field
validation nicely? Say, an amount field that contains a valid description of
a numeric amount. I can think of three ways of doing it:

- Client side JavaScript: is there any abstraction model for this in Seaside
or Scriptaculous?
- Server side processing: could validate the fields in the form submit
callback and return back to the form with some feedback
- AJAX: could validate the field on the server as soon as user leaves it,
any good examples of this?

Thanks!

-Boris

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DeepCove Labs Ltd.
4th floor 595 Howe Street
Vancouver, Canada V6C 2T5

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Chad Nantais-2

Re: Field validation?

Boris,

Have a look at the store example in Seaside-Examples-Store.
Specifically, have a look at the class comments in WAStoreCreditCard.
They may be a good starting point to guide your thinking on
server-side model validation.

Hope this helps,

Chad

On 5/30/06, Boris Popov <[hidden email]> wrote:

> Morning,
>
> The round of questioning continues. How would I go about doing field
> validation nicely? Say, an amount field that contains a valid description of
> a numeric amount. I can think of three ways of doing it:
>
> - Client side JavaScript: is there any abstraction model for this in Seaside
> or Scriptaculous?
> - Server side processing: could validate the fields in the form submit
> callback and return back to the form with some feedback
> - AJAX: could validate the field on the server as soon as user leaves it,
> any good examples of this?
>
> Thanks!
>
> -Boris
>
> --
> +1.604.689.0322
> DeepCove Labs Ltd.
> 4th floor 595 Howe Street
> Vancouver, Canada V6C 2T5
>
> [hidden email]
>
> CONFIDENTIALITY NOTICE
>
> This email is intended only for the persons named in the message
> header. Unless otherwise indicated, it contains information that is
> private and confidential. If you have received it in error, please
> notify the sender and delete the entire message including any
> attachments.
>
> Thank you.
>
>
> _______________________________________________
> Seaside mailing list
> [hidden email]
> http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside
>
>
>
>

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Rick Flower

Re: Field validation?

Chad Nantais wrote:
> Boris,
>
> Have a look at the store example in Seaside-Examples-Store.
> Specifically, have a look at the class comments in WAStoreCreditCard.
> They may be a good starting point to guide your thinking on
> server-side model validation.

Sorry for resurrecting an older thread, but I had a few questions I
wanted to ask.. Specifically, for those of you using field validation
within Seaside forms, are you using that in conjunction with
WAModelProxy or stand-alone without it?

Also -- are you validating the fields at the end of your form processing
(care of your submitButton callback:) or within each of the various
field callbacks?

Also -- are there any pitfalls to watch out for? I'm trying to get all
of my ducks lined up before I rewrite code over-n-over-n-over.. Thanks!

-- Rick
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