Af:query issues within a taskflow

Question

JDev: 11.1.2.1
I've created a simple fusion app, using the HR countries and department tables. The ViewController contains a home page and a taskflow.
The taskflow accepts a 'SearchBy' parameter, and I have a router (default) which then redirects the user to one of two pages, based on that parameter.
<case id="__1">
<expression>#{pageFlowScope.SearchBy eq 'countries'}</expression>
<outcome>countries</outcome>
</case>
<case id="__2">
<expression>#{pageFlowScope.SearchBy eq 'depts'}</expression>
<outcome>depts</outcome>
</case>
The two pages "CountriesQueryPage" and "DeptsQueryPage" contain nothing more than a standard af:query (with table) based on the named criteria "All Queriable Attributes" for respective views.
The Home page contains the taskflow above as a region, and a couple of links, which set a #{requestScope.SearchBy} parameter. The taskflow binding was changed to Refresh 'ifNeeded'.
<af:panelHeader text="panelHeader 1" id="ph1">
<f:facet name="context"/>
<f:facet name="menuBar"/>
<f:facet name="toolbar">
<af:group id="g1">
<af:commandLink text="Countries" id="cl1" partialSubmit="true">
<af:setPropertyListener from="#{'countries'}" to="#{requestScope.SearchBy}"
type="action"/>
</af:commandLink>
<af:spacer width="10" height="10" id="s1"/>
<af:commandLink text="Depts" id="cl2" partialSubmit="true">
<af:setPropertyListener from="#{'depts'}" to="#{requestScope.SearchBy}"
type="action"/>
</af:commandLink>
</af:group>
</f:facet>
<f:facet name="legend"/>
<f:facet name="info"/>
<af:region value="#{bindings.tf11.regionModel}" id="r1" partialTriggers="::cl1 ::cl2"/>
</af:panelHeader>
When I run this, the default "countries" page is displayed in the region. The af:query functions perfectly. When I click the link to the Depts page, the region refreshes as expected, but when the query table is rendered an error is thrown "Content failed to load.... data transmission was interrupted. Checking the log, I'm getting....
<LifecycleImpl> <_handleException> ADF_FACES-60098:Faces lifecycle receives unhandled exceptions in phase RENDER_RESPONSE 6
java.lang.IllegalStateException: Could not find component to stream
<FaceletViewHandlingStrategy> <handleRenderException> Error Rendering View[Home]
java.lang.IllegalStateException: Could not find component to stream
Couldn't find much online about this error message.
The only way I've been able to stop the issue is to remove the af:table on the depts query page.
I also tried using a dynamic region to get the above functionality (dividing each query page into it's own taskflow and removing the router) and got exactly the same issue.
Any ideas?
Thanks
Edited by: drb on Nov 24, 2011 6:31 PM

Answer 1

Just in case anyone else has this issue -:
It turns out that the fault was using RequestScope parameters within the af:setPropertyListener. Once I changed this to a longer scope, pageFlowScope for example, the issue was resolved.