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https://issues.apache.org/jira/browse/TRINIDAD-2216?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13480824#comment-13480824
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Robert Schoch edited comment on TRINIDAD-2216 at 10/20/12 8:46 PM:
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The renderer creates for a tr:commandButton without explicit id attribute this:

<button class="af_commandButton" 
onclick="TrPage._autoSubmit('TestForm','j_idt1',event,1);return false;" 
type="button">PPR Test</button>

You can see, that the onclick handler contains an TrPage._autoSubmit() call 
with a autogenerated source id as argument. This is the reason why the source 
is part of the payload.

But the <button> tag has no rended id attribute, so that it can never be found 
by the script, which searches the element in the DOM tree. This causes a null 
to be passed as source parameter in the jsf.ajax.request call and finally ends 
as error like  "jsf.ajax.request: source not set" in Mojarra.

EDIT: same problem here:

  https://issues.apache.org/jira/browse/TRINIDAD-2259
  https://issues.apache.org/jira/browse/TRINIDAD-2302
                
      was (Author: robs888):
    The renderer creates for a tr:commandButton without explicit id attribute 
this:

<button class="af_commandButton" 
onclick="TrPage._autoSubmit('TestForm','j_idt1',event,1);return false;" 
type="button">PPR Test</button>

You can see, that the onclick handler contains an TrPage._autoSubmit() call 
with a autogenerated source id as argument. This is the reason why the source 
is part of the payload.

But the <button> tag has no rended id attribute, so that it can never be found 
by the script, which searches the element in the DOM tree. This causes a null 
to be passed as source parameter in the jsf.ajax.request call and finally ends 
as error like  "jsf.ajax.request: source not set" in Mojarra.
                  
> The partialSubmit does not work with JSF 2 RI
> ---------------------------------------------
>
>                 Key: TRINIDAD-2216
>                 URL: https://issues.apache.org/jira/browse/TRINIDAD-2216
>             Project: MyFaces Trinidad
>          Issue Type: Bug
>          Components: Components
>    Affects Versions: 2.0.0-core
>         Environment: Mojarra 2.1.6 (SNAPSHOT 20111206)
> Glassfish 3.1.1
> Trinidad 2.0.0
>            Reporter: Tomas Havelka
>
> Trinidad's partialSubmit does not work because the source parameter passed in 
> the jsf.ajax.request call is null. See XMLRequest.js on the line 358. The 
> source is part of the payload but is not assigned to the source parameter 
> itself. It causes the RI implementation of jsf.ajax.request throws an error 
> because of this code in it:
> if (typeof source === 'undefined' || source === null) {
>   throw new Error("jsf.ajax.request: source not set");
> } 

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