Dynamic Declare Component cannot find property

Question

We currently have one main page calls a DDC(Dynamic declarative component) page fragment to create/update a record in database. The main page pass in a key to DDC when it loads DDC. The DDC binds to a view object with bind variable (get value from the passed key and load data from table) and several LOV attributes. Once user clicks submit button in main page, we wish that all the fields displayed in DDC could be committed to a database table to save.
I use 11.1.1.5.
In order to assign the bind variable of VO, we wrote a method in Application Module and make it invoked as the first executable when the main page is loaded. The deployment is fine. However, the runtime always thrown some exception to complain it cannot find property definition like this:
####<Aug 15, 2011 6:32:24 PM CDT> <Warning> <oracle.adfinternal.view.faces.lifecycle.LifecycleImpl> <curmailts1-corp> <AdminServer> <[ACTIVE] ExecuteThread: '2' for queue: 'weblogic.kernel.Default (self-tuning)'> <<anonymous>> <> <6b1af60b3a40d50a:-6c52e935:131cfc2d522:-8000-000000000000024c> <1313451144494> <BEA-000000> <ADF_FACES-60098:Faces lifecycle receives unhandled exceptions in phase RENDER_RESPONSE 6
javax.el.PropertyNotFoundException: Target Unreachable, 'WorkDescription' returned null
     at com.sun.el.parser.AstValue.getTarget(Unknown Source)
     at com.sun.el.parser.AstValue.isReadOnly(Unknown Source)
     at com.sun.el.ValueExpressionImpl.isReadOnly(Unknown Source)
     at oracle.adfinternal.view.faces.renderkit.rich.EditableValueRenderer._getUncachedReadOnly(EditableValueRenderer.java:486)
     at oracle.adfinternal.view.faces.renderkit.rich.EditableValueRenderer.cacheReadOnly(EditableValueRenderer.java:416)
     at oracle.adfinternal.view.faces.renderkit.rich.LabeledInputRenderer.beforeEncode(LabeledInputRenderer.java:128)
     at org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:334)
     at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:767)
     at javax.faces.component.UIComponent.encodeAll(UIComponent.java:937)
     at org.apache.myfaces.trinidad.render.CoreRenderer.encodeChild(CoreRenderer.java:399)
     at oracle.adf.view.rich.render.RichRenderer.encodeChild(RichRenderer.java:2633)
Questions: 1) Why my method in Application Module not called?
2) Whether DDC is a right solution for our use case? Any suggestion or sample are welcomed!
Thanks,

Answer 1

Hi,
I appreciate if you can show your code, but before that, make sure if you're following this tip below:
"Declarative Components are regular JSF components except that they are built as a composite out of existing ADF Faces components. Declarative components cannot have a PageDef file associated with it and instead use value or method attribute to communicate with the consuming page. When creating a declarative component, the attrs implicit object is defined that allow you to reference the component's exposed value attribute from ADF Faces components within.
An input text field contained in an declarative component may reference a value attribute "compValue" defined on the declarative component by using the following EL
#{attrs.compValue}
The declarative component compValue attribute then would us an EL reference like shown next to read/write values from or to the ADF binding layer:
#{bindings.attribute_name.inputValue}"
(Oracle ADF Code Corner)
Regards,