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Re: Field Validation
by Janko Mivsek
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Rob Rothwell wrote:
> Also, it would be nice to enhance field validation and error reporting a
> bit. I'm thinking about ajaxified validation immediately after data
> entry and immediate error reporting near the field. Non-intrusive and
> elegant.
>
> We can do that by extending WebInputField (WebFormElement?) to include a
> validation block, which is executed immediately after data entry. We can
> also provide convenience methods for some most usual validations like
> date, email, numbers etc.
> I guess that was sort of what I was wondering about after playing around
> with Magritte in Seaside a bit. It would put the specified error
> message right there on the form, but was not "ajaxified" (I don't
> think). It just performed the validation rules upon form entry, with a
> syntax like:
>
> (StringDescription selector: #email label: 'E-Mail Address')
> addCondition: [ :value |
> (value matches: '*#@#*.#*')
> & (value endsWith: '.ch') ] asCondition
> label: 'Invalid E-Mail';
> yourself.
>
> You would then send a message like "asComponentOn:" to the "Description"
> of the object to get a Morphic/Seaside component, ready to add to your form.
>
> I suppose the Magritte framework could be extended to use Aida objects,
> if you thought that would be worthwhile. Then you would be describing
> your domain with "Meta objects" that "knew" how to display themselves in
> Aida.
>
> I don't have enough experience to know if the overhead of a
> Meta-framework is worth it for most applications, though.
I also have a similar doubt and for now it would be most user friendly
to extend WebFormElement, so that you'll have a code like:
e addInputFieldAspect: #email
for: self observee
validIf: [:value |
(value matches: '*#@#*.#*') & (value endsWith: '.ch')
errorText: 'Invalid E-Mail'
Maybe method could be named better...
Janko
--
Janko Mivšek
AIDA/Web
Smalltalk Web Application Server
http://www.aidaweb.si
_______________________________________________
Aida mailing list
Aida@...
http://lists.aidaweb.si/mailman/listinfo/aida
> Also, it would be nice to enhance field validation and error reporting a
> bit. I'm thinking about ajaxified validation immediately after data
> entry and immediate error reporting near the field. Non-intrusive and
> elegant.
>
> We can do that by extending WebInputField (WebFormElement?) to include a
> validation block, which is executed immediately after data entry. We can
> also provide convenience methods for some most usual validations like
> date, email, numbers etc.
> I guess that was sort of what I was wondering about after playing around
> with Magritte in Seaside a bit. It would put the specified error
> message right there on the form, but was not "ajaxified" (I don't
> think). It just performed the validation rules upon form entry, with a
> syntax like:
>
> (StringDescription selector: #email label: 'E-Mail Address')
> addCondition: [ :value |
> (value matches: '*#@#*.#*')
> & (value endsWith: '.ch') ] asCondition
> label: 'Invalid E-Mail';
> yourself.
>
> You would then send a message like "asComponentOn:" to the "Description"
> of the object to get a Morphic/Seaside component, ready to add to your form.
>
> I suppose the Magritte framework could be extended to use Aida objects,
> if you thought that would be worthwhile. Then you would be describing
> your domain with "Meta objects" that "knew" how to display themselves in
> Aida.
>
> I don't have enough experience to know if the overhead of a
> Meta-framework is worth it for most applications, though.
I also have a similar doubt and for now it would be most user friendly
to extend WebFormElement, so that you'll have a code like:
e addInputFieldAspect: #email
for: self observee
validIf: [:value |
(value matches: '*#@#*.#*') & (value endsWith: '.ch')
errorText: 'Invalid E-Mail'
Maybe method could be named better...
Janko
--
Janko Mivšek
AIDA/Web
Smalltalk Web Application Server
http://www.aidaweb.si
_______________________________________________
Aida mailing list
Aida@...
http://lists.aidaweb.si/mailman/listinfo/aida
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