[richfaces-issues] [JBoss JIRA] (RF-10992) dragValue expression is evaluated to null in customcomponent

[Brian Leathem (Updated) (JIRA)]

     [ https://issues.jboss.org/browse/RF-10992?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Brian Leathem updated RF-10992:
-------------------------------

         Fix Version/s: 4.Future
                            (was: 4.1.0.Final)
           Description: 
When the dragValue is set in a customcomponent, it's always evaluated to null. (dropEvent.getDragValue() == null)
If a stringvalue is set instead, the value is submitted correctly.

Example:
{code}
<rich:dragSource type="sometype" dragValue="#{cc.attrs.myvalue}"/>
{code}

same code outside of the customcomponent works fine.

  was:
When the dragValue is set in a customcomponent, it's always evaluated to null. (dropEvent.getDragValue() == null)
If a stringvalue is set instead, the value is submitted correctly.

Example:
<rich:dragSource type="sometype" dragValue="#{cc.attrs.myvalue}"/>

same code outside of the customcomponent works fine.

    Steps to Reproduce: 
create a customcomponent like the following:

{code}
<composite:interface>
    <composite:attribute name="myvalue" />
</composite:interface>
<composite:implementation>
        <h:form>
        <a4j:outputPanel>
           <rich:dragSource type="sometype" dragValue="#{cc.attrs.myvalue}"/>
           ...
        </a4j:outputPanel>
        </h:form>
    </composite:implementation>
{code}

and a <rich:dropTarget ... somewhere else.

  was:
create a customcomponent like the following:

...
<composite:interface>
    <composite:attribute name="myvalue" />
</composite:interface>
<composite:implementation>
        <h:form>
        <a4j:outputPanel>
           <rich:dragSource type="sometype" dragValue="#{cc.attrs.myvalue}"/>
           ...
        </a4j:outputPanel>
        </h:form>
    </composite:implementation>

and a <rich:dropTarget ... somewhere else.

                Labels: customcomponent  (was: customcomponent draganddrop needs-qe richfaces)
              Assignee:     (was: Brian Leathem)
           Component/s: third-party


Looks like the problem stems from upstream with JAVASERVERFACES-2009/MYFACES-3283:
{quote}
The main problem is that if you reference a property of child component anywhere outside of the composite (i.e. in an action method, a component system event, etc.), it simply will not work if it was set to a composite component attribute (i.e. _#\{cc.attrs.property}_).
{quote}

Confirmed by taking the _dragValue_ assigned to the composite component, and applying it directly to the _dragSource_ (iow not using the _cc.attrs.dragSource_ peroperty), and the metamer sample works.

Feel free to comment/vote on the upstream issue, to see it resolved.
                
> dragValue expression is evaluated to null in customcomponent
> ------------------------------------------------------------
>
>                 Key: RF-10992
>                 URL: https://issues.jboss.org/browse/RF-10992
>             Project: RichFaces
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: component-drag/drop, third-party
>    Affects Versions: 4.0.0.Final
>         Environment: JSF2 environment with Richfaces 4 Final
>            Reporter: Adrian Höhn
>              Labels: customcomponent
>             Fix For: 4.Future
>
>         Attachments: dnd.png
>
>
> When the dragValue is set in a customcomponent, it's always evaluated to null. (dropEvent.getDragValue() == null)
> If a stringvalue is set instead, the value is submitted correctly.
> Example:
> {code}
> <rich:dragSource type="sometype" dragValue="#{cc.attrs.myvalue}"/>
> {code}
> same code outside of the customcomponent works fine.

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