this where my considerations:
- i have a listener with useful parameter names/types
- i do not have to define any abstract properties thus keeping
my controller class simpler and cleaner (.. and less code in .page :))
andyhot
<[EMAIL PROTECTED]
r> An
Gesendet von: Tapestry users
andreas a <users@tapestry.apache.org>
<[EMAIL PROTECTED] Kopie
om>
Thema
Re: LinkSubmit and null parameters
06.02.2007 11:27
Bitte antworten
an
"Tapestry users"
<[EMAIL PROTECTED]
pache.org>
ok, let's see...
if you have a form that includes a (validated) TextField,
and a LinkSubmit for that form, why use a parameter?
Kristian Marinkovic wrote:
> i will try as you propose :)
>
> but what bothers me is that i have a validator applied to the TextField.
> Shouldn't Tapestry check the validators before it proceeds to execute
> the listeners?
>
> I'm must admit, i'm not aware at which point of the request processing
> lifecycle validation is done. i was always expecting validators are
> always evalutated before anything else.
>
> can you give me some hints/clarifications?
>
> g,
> kris
>
>
>
>
> andyhot
> <[EMAIL PROTECTED]
> r>
An
> Gesendet von: Tapestry users
> andreas a <users@tapestry.apache.org>
> <[EMAIL PROTECTED]
Kopie
> om>
>
Thema
> Re: LinkSubmit and null
parameters
> 06.02.2007 10:48
>
>
> Bitte antworten
> an
> "Tapestry users"
> <[EMAIL PROTECTED]
> pache.org>
>
>
>
>
>
>
> The parameter of your LinkSumbit will always by null
> because when the link is constructed (at render time) that's what
> the value of searchFieldValue is.
>
> Now regarding listeners and null values, I think it was discussed
> a year ago and that this behaviour is the expected one.
> If you want to be able to check for nulls, you can:
> - Make the method accept the RequestCycle parameter and use that to get
> the parameters
> - or, use <binding name="parameters" value="{searchFieldValue}" /> (it
> should work)
>
> So, i feel that TAPESTRY-1240 is invalid
>
>
> Kristian Marinkovic wrote:
>
>> hi all,
>>
>> i just noticed that if an LinkSubmit component with a parameters binding
>> to a TextField causes an exception (on submit) if that input field
>>
> remains
>
>> empty (null). The reason is that the listener bound to the LinkSubmit
>> requires
>> exactly one parameter. And if the TextField remains empty Tapestry tries
>> to resolve a listener with no parameters that does not exist. This
>> exception
>> happens even if the TextField has a required validator assigned to.
>>
>> Is that an expected behaviour?
>>
>>
>> <component id="lnk_read" type="LinkSubmit">
>> <binding name="listener" value="listener:readGPList" />
>> <binding name="parameters" value="searchFieldValue" />
>> </component>
>>
>> <component id="txtSearchField" type="TextField">
>> <binding name="value" value="searchFieldValue" />
>> <binding name="validators" value="validators:required,min=2" />
>> </component>
>>
>> <property name="searchFieldValue" />
>>
>>
>> g,
>> kris
>>
>> P.S. i'm using Tapestry 4.1.2
>>
>>
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>>
>>
>>
>
>
> --
> Andreas Andreou - [EMAIL PROTECTED] - http://andyhot.di.uoa.gr
> Tapestry / Tacos developer
> Open Source / J2EE Consulting
>
>
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--
Andreas Andreou - [EMAIL PROTECTED] - http://andyhot.di.uoa.gr
Tapestry / Tacos developer
Open Source / J2EE Consulting
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