LOV problem : here is my code

Question

Hello all,
I've been trawling through the forums trying to find a solution to this problem but with no success.
I am trying to create an LOV for my application, the Activity_Plan_ObjectView1_Update page accesses the LOV (via LocationLOV.uix) which is meant to then update this page.
Here is my code, the first page has the BC4J tag which opens the LocationLOV.uix page, I think the problem lies with how I'm trying to pass the parameter back to the Activity_Plan_ObjectView1_Update page :
Activity_Plan_ObjectView1_Update :
<?xml version="1.0" encoding="windows-1252" ?>
<page xmlns="http://xmlns.oracle.com/uix/controller"
xmlns:ctrl="http://xmlns.oracle.com/uix/controller"
xmlns:ui="http://xmlns.oracle.com/uix/ui"
xmlns:bc4j="http://xmlns.oracle.com/uix/bc4j" >
<bc4j:registryDef>
<bc4j:rootAppModuleDef name="Activity_Plan_ObjectView1AppModule"
definition="uiXML.BC4J_PackageModule"
releaseMode="stateful" >
<bc4j:viewObjectDef name="Activity_Plan_ObjectView1" >
<bc4j:rowDef name="UpdateActivity_Plan_ObjectView1" autoCreate="false" >
<bc4j:propertyKey name="key" />
</bc4j:rowDef>
</bc4j:viewObjectDef>
</bc4j:rootAppModuleDef>
</bc4j:registryDef>
<content>
<try xmlns="http://xmlns.oracle.com/uix/ui"
xmlns:data="http://xmlns.oracle.com/uix/ui" >
<catch>
<displayException />
</catch>
<contents>
<switcher childName="default">
<boundAttribute name="childName">
<if>
<comparison type="equals">
<dataObject select="key" source="ctrl:page"/>
<dataObject source="ui:null"/>
</comparison>
<fixed text="error"/>
</if>
</boundAttribute>
<case name="error">
<header text="Required page property 'key' missing. Cannot display page."/>
</case>
<case name="default">
<pageLayout title="Activity Plan - Update" >
<!-- Start of common pageLayout section. If you plan to expand this
example application, consider using a UIT template to specify the common
portions of your pageLayout -->
<productBranding>
<image source="tools_collage.gif" shortDesc="JDeveloper Product Logo"/>
</productBranding>
<corporateBranding>
<image source="oraclelogo.gif" shortDesc="Oracle Logo"/>
</corporateBranding>
<globalButtons>
<globalButtonBar>
<contents>
<globalButton source="www_home.gif"
text="Home"
destination="Main.uix" />
<globalButton source="www_contact.gif"
text="Contact Us"
destination="http://www.oracle.com" />
<globalButton source="www_help.gif"
text="Help"
destination="http://otn.oracle.com/products/jdev/content.html" />
</contents>
</globalButtonBar>
</globalButtons>
<copyright>Copyright 2002 Oracle Corporation. All Rights Reserved.</copyright>
<privacy>
<link text="Privacy Statement" destination="http://www.oracle.com"/>
</privacy>
<!-- End of common pageLayout section -->
<contents>
<!-- this will contain any validation errors after form
submission -->
<messageBox automatic="true" />
<form name="updateForm" method="POST" >
<contents>
<!-- we cannot implicitly determine that events
will be triggered because submit buttons are
outside the form scope, so add the placeholder
explicitly -->
<formParameter name="event" />
<!-- layout the fields in two columns -->
<tableLayout>
<contents>
<bc4j:rootAppModuleScope name="Activity_Plan_ObjectView1AppModule" >
<contents>
<bc4j:viewObjectScope name="Activity_Plan_ObjectView1" >
<contents>
<bc4j:rowScope name="UpdateActivity_Plan_ObjectView1" >
<contents>
<bc4j:messageInput attrName="PlanId" prompt="Plan ID" />
<bc4j:messageInput attrName="PlanType" prompt="Plan Type"/>
<bc4j:messageInput attrName="PlanTypeCode" />
<bc4j:messageInput attrName="PlanDesc" />
<bc4j:messageInput attrName="PlanStart" />
<bc4j:messageInput attrName="PlanFinish" />
<bc4j:messageInput attrName="ActivityApproved" />
<bc4j:messageInput attrName="CreatedBy" />
<bc4j:messageLovField attrName="DeployToLocation"
onClick="openWindow(top,
'LocationLOV.uix',
'lovWindow',
{width:400, height:450},
true,
'dialog')" />
</contents>
</bc4j:rowScope>
</contents>
</bc4j:viewObjectScope>
</contents>
</bc4j:rootAppModuleScope>
</contents>
</tableLayout>
</contents>
</form>
</contents>
<contentFooter>
<!-- place a row of buttons below the content -->
<pageButtonBar>
<contents>
<!-- the cancel button performs a transaction rollback -->
<button text="Cancel" ctrl:event="cancel" />
<!-- the update button submits the user-entered
form data -->
<submitButton text="Update" formName="updateForm"
ctrl:event="apply" />
</contents>
</pageButtonBar>
</contentFooter>
</pageLayout>
</case>
</switcher>
</contents>
</try>
</content>
<handlers>
<event name="cancel" >
<!-- using the ApplicationModule causes it to be checked out from the
ApplicationPool. It is released using stateful mode. -->
<bc4j:findRootAppModule name="Activity_Plan_ObjectView1AppModule" >
<!-- rollback the current transaction -->
<bc4j:rollback/>
<!-- forward to the summary page -->
<ctrl:go name="Activity_Plan_ObjectView1_View" redirect="true" />
</bc4j:findRootAppModule>
</event>
<event name="apply" >
<!-- using the ApplicationModule causes it to be checked out from the
ApplicationPool. It is released using stateful mode. -->
<bc4j:findRootAppModule name="Activity_Plan_ObjectView1AppModule" >
<!-- establish the ViewObject scope -->
<bc4j:findViewObject name="Activity_Plan_ObjectView1" >
<!-- find the row by key, falling back on a new default
row if the key is not found -->
<bc4j:findRow name="UpdateActivity_Plan_ObjectView1" >
<!-- set each attribute explicitly -->
<bc4j:setAttribute name="PlanId" />
<bc4j:setAttribute name="PlanType" />
<bc4j:setAttribute name="PlanTypeCode" />
<bc4j:setAttribute name="PlanDesc" />
<bc4j:setAttribute name="PlanStart" />
<bc4j:setAttribute name="PlanFinish" />
<bc4j:setAttribute name="ActivityApproved" />
<bc4j:setAttribute name="CreatedBy" />
<bc4j:setAttribute name="DeployToLocation" />
<!-- commit the transaction -->
<bc4j:commit/>
<bc4j:executeQuery/>
<!-- forward to the summary page -->
<ctrl:go name="Activity_Plan_ObjectView1_View" redirect="true" />
</bc4j:findRow>
</bc4j:findViewObject>
</bc4j:findRootAppModule>
</event>
</handlers>
</page>
LocationLOV.uix :
<?xml version="1.0" encoding="windows-1252" ?>
<page xmlns="http://xmlns.oracle.com/uix/controller"
xmlns:ctrl="http://xmlns.oracle.com/uix/controller"
xmlns:ui="http://xmlns.oracle.com/uix/ui"
xmlns:bc4j="http://xmlns.oracle.com/uix/bc4j" >
<bc4j:registryDef>
<bc4j:rootAppModuleDef name="LocationView1AppModule"
definition="uiXML.BC4J_PackageModule"
releaseMode="stateful" >
<bc4j:viewObjectDef name="LocationView1"
rangeSize="5" />
</bc4j:rootAppModuleDef>
</bc4j:registryDef>
<content>
<try xmlns="http://xmlns.oracle.com/uix/ui"
xmlns:data="http://xmlns.oracle.com/uix/ui" >
<catch>
<displayException />
</catch>
<contents>
<pageLayout xmlns="http://xmlns.oracle.com/uix/ui"
xmlns:data="http://xmlns.oracle.com/uix/ui"
title="Location LOV" >
<!-- Start of common pageLayout section. If you plan to expand this
example application, consider using a UIT template to specify the common
portions of your pageLayout -->
<!-- End of common pageLayout section -->
<contents>
<!-- this will contain any validation errors after form
submission -->
<messageBox automatic="true" />
<bc4j:rootAppModuleScope name="LocationView1AppModule" >
<contents>
<header text="Search" >
<contents>
<form name="search" method="POST" >
<contents>
<inlineMessage prompt="Search" vAlign="middle" >
<contents>
<flowLayout>
<contents>
<choice name="attrName"
data:selectedValue="attrName@ctrl:page"
shortDesc="Search Column">
<contents>
<option text="LoCode" value="LoCode" />
</contents>
</choice>
<textInput name="attrValue" columns="20"
data:text="attrValue@ctrl:page"
shortDesc="Search"/>
</contents>
</flowLayout>
</contents>
<end>
<submitButton text="Go" ctrl:event="search" />
</end>
</inlineMessage>
</contents>
</form>
</contents>
</header>
<header text="Results" >
<contents>
<form name="viewForm" method="POST" >
<contents>
<tableLayout>
<contents>
<bc4j:viewObjectScope name="LocationView1" >
<contents>
<bc4j:table name="viewTable" width="20%"
alternateText="No rows found">
<tableSelection>
<!-- single selection for each row in the table -->
<singleSelection selectedIndex="0" shortDesc="Select Row">
<contents>
<!-- the update button causes the currently selected
row to be sent to the update page -->
<!-- the delete button causes the currently selected
row to be removed -->
</contents>
</singleSelection>
</tableSelection>
<!-- the key identifying the current row in the table -->
<bc4j:keyStamp>
<bc4j:rowKey name="key" />
</bc4j:keyStamp>
<contents>
<!-- A bc4j:column element is added for each attribute
in the ViewObject. -->
<bc4j:column attrName="LoCode">
<columnHeader>
<bc4j:sortableHeader sortable="no" text="Location Code" />
</columnHeader>
<contents>
<bc4j:input readOnly="true"/>
</contents>
</bc4j:column>
</contents>
</bc4j:table>
</contents>
</bc4j:viewObjectScope>
</contents>
</tableLayout>
</contents>
</form>
</contents>
</header>
</contents>
</bc4j:rootAppModuleScope>
</contents>
<contentFooter>
<!-- the create button redirects to the create page -->
<button text="Select" ctrl:event="select" />
</contentFooter>
</pageLayout>
</contents>
</try>
</content>
<handlers>
<event name="search" >
<!-- using the ApplicationModule causes it to be checked out from the
ApplicationPool. It is released using stateful mode. -->
<bc4j:findRootAppModule name="LocationView1AppModule" >
<!-- establish the ViewObject scope -->
<bc4j:findViewObject name="LocationView1" >
<!-- search for the view criteria -->
<bc4j:findByExample>
<bc4j:exampleRow ignoreCase="true" >
<bc4j:exampleAttribute>
<bc4j:nameBinding><bc4j:parameter name="attrName" /></bc4j:nameBinding>
<bc4j:valueBinding><bc4j:parameter name="attrValue" /></bc4j:valueBinding>
</bc4j:exampleAttribute>
</bc4j:exampleRow>
</bc4j:findByExample>
<bc4j:executeQuery/>
<!-- store the current search criteria as page properties -->
<bc4j:setPageProperty name="attrName" >
<bc4j:parameter name="attrName" />
</bc4j:setPageProperty>
<bc4j:setPageProperty name="attrValue" >
<bc4j:parameter name="attrValue" />
</bc4j:setPageProperty>
</bc4j:findViewObject>
</bc4j:findRootAppModule>
</event>
<event name="sort" source="viewTable" >
<!-- using the ApplicationModule causes it to be checked out from the
ApplicationPool. It is released using stateful mode. -->
<bc4j:findRootAppModule name="LocationView1AppModule" >
<!-- establish the ViewObject scope -->
<bc4j:findViewObject name="LocationView1" >
<!-- sort by the submitted attribute name -->
<bc4j:sort/>
</bc4j:findViewObject>
</bc4j:findRootAppModule>
</event>
<event name="goto" source="viewTable" >
<!-- using the ApplicationModule causes it to be checked out from the
ApplicationPool. It is released using stateful mode. -->
<bc4j:findRootAppModule name="LocationView1AppModule" >
<!-- establish the ViewObject scope -->
<bc4j:findViewObject name="LocationView1" >
<!-- navigate to the submitted range -->
<bc4j:goto/>
</bc4j:findViewObject>
</bc4j:findRootAppModule>
</event>
<event name="select" >
<ctrl:go name="Activity_Plan_ObjectView1_Update" redirect="false" >
<ctrl:property name="key">
<ctrl:selection name="viewTable" key="key" />
</ctrl:property>
</ctrl:go>
</event>
</handlers>
</page>
My apologies for such a huge post, hopefully any solutions will serve as some sort of tutorial for others stuck with this problem.
I thank the kind souls in advance for any solutions they offer.
Greg

Answer 1

That's a bit too much code to look into, I'm afraid.
Perhaps you could enable UIX debug mode (see the UIX
Configuration chapter) and see the servlet log to
find out what parameters are being sent back to
the server.