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https://jira.jboss.org/jira/browse/RF-6951?page=com.atlassian.jira.plugin...
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Wayne Bagguley commented on RF-6951:
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I have figured out one possible cause of this problem and I can reproduce it.
I have a table with a list of available options, let's call it the AVAILABLE_OPTION
table. I also have a USER table and each User can have zero or more AvailableOptions
chosen as their 'default options'.
I am using Seam and Hibernate and have a query like this for the options:
"select o from AvailableOption o", populating the 'availableList'
variable
and this query for getting the user :
"select u from User u where u.username = :usernameParam" populating the
'user' variable
In the listShuttle, I tie the 'sourceValue' to 'availableList' and
targetValue to 'user.defaultOptionList' then you will get the 'component value
has invalid expression' error. (For this error to occur, user.defaultOptionList must
not be empty).
This occurs because the AvailableOption object(s) in the user.defaultOptionList is first
created by hibernate with javassist and it appears that this doesn't correctly pass on
calls to .equals (that's my guess anyway).
This even occurs if I set eager fetching of the related entities.
Hope this helps in some way.
List shuttle causes "invalid value expression" error.
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Key: RF-6951
URL:
https://jira.jboss.org/jira/browse/RF-6951
Project: RichFaces
Issue Type: Bug
Components: component-input
Affects Versions: 3.3.0
Environment: Windows XP,Eclipse 3.4.1, Sun JDK1.5.
Reporter: aasia samreen
Assignee: Tsikhon Kuprevich
Priority: Critical
I found this thread by search "invalidvalue expression".
Initially i was getting this exception for source list and after implementing the
workaround using object array,it was working for source list.
And now iam getting the same exception for target list.
I tried to use an object array for target list as well but was not able to initialize the
array (i need to specify the size but in this case array size is dyamic.)
Please have a look at the code:
<rich:listShuttle id="LineConfigs"
sourceValue="#{bean.availableline}"
targetValue="#{bean.selectedLine}" var="varaible"
sourceListWidth="280" listsHeight="250"
targetListWidth="280"
binding="#{bean.ShuttleList}"
converter="convertor">
</rich:listShuttle>
public Object[] getAvailableLine() {
if (availableline== null) {
availableline = initialLineList.toArray();
}
return availableline ;
}
public Object[] getSelectedLine() {
if selectedLine== null) {
// how to initialize the array. as i dont have any control on the number of selected
lines.?
}
return selectedLine;
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