primaryKey converter problem

[abhilash <so...@gmail.com>]

Hi all,

I have a table inside a form with a checkbox as a column.I am listing all
the items in the table using primaryKeyConverter.
When i select the checkbox(item) and submit the page my item(or items which
is a collection) is becomming null.My code in HTML page is

<table>
	  <tbody  jwcid="@For" source="ognl:items" value="ognl:item"
converter="ognl:converter" index="ognl:index">
..................
</tbody>
</table>

The top of the stack trace:
org.apache.tapestry.BindingException
2 	Unable to update OGNL expression '<parsed OGNL expression>' of
$DentalCharting_33@f5d08e[DentalCharting] to true: target is null for
setProperty(null, "selected", true)
3 	binding:        ExpressionBinding[DentalCharting item.selected]
4 	location:       context:/DentalCharting.html, line 764
5 	759     <th>Our Fee</th>
6 	760     </tr>
7 	761     
8 	762     
9 	763     <tr>
10 	764     <td width="1%"><input jwcid="delete@Checkbox"
selected="ognl:item.selected" type="checkbox" name="" /></td>
11 	765     <td>Procedure Code
12 	766     <div class="preauth_mark" jwcid="@If"
condition="ognl:item.preauth != null" element="div">
13 	767      EditPreAuthorization.html P </div>
14 	768     <div class="claim_mark" jwcid="@If" condition="ognl:item.claim
!= null" element="div">
15 	769      EditClaim.html C </div>
16 	 
17 	org.apache.hivemind.ApplicationRuntimeException
18 	Unable to update OGNL expression '<parsed OGNL expression>' of
$DentalCharting_33@f5d08e[DentalCharting] to true: target is null for
setProperty(null, "selected", true)
19 	component:      $DentalCharting_33@f5d08e[DentalCharting]
20 	location:       context:/DentalCharting.html
21 	 
22 	ognl.OgnlException
23 	target is null for setProperty(null, "selected", true)
24 	Stack Trace:
25 	
26 	    * ognl.OgnlRuntime.setProperty(OgnlRuntime.java:1624)
27 	    * ognl.ASTProperty.setValueBody(ASTProperty.java:105)
28 	    * ognl.SimpleNode.evaluateSetValueBody(SimpleNode.java:177)
29 	    * ognl.SimpleNode.setValue(SimpleNode.java:246)
30 	    * ognl.ASTChain.setValueBody(ASTChain.java:172)
31 	    * ognl.SimpleNode.evaluateSetValueBody(SimpleNode.java:177)

any ideas?

Thanks in advance
abhilash
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