commandLink/commandButtton do not invoke action listener

[mrwaves]

I would like to update the values of the following check boxes in the database by using a form as shown below.

<h:form id="category_form">
 <h:dataTable value="#{categoryFinder.categories}"
 border="1" var="category"
 rendered="#{not empty categoryFinder.categories}">
 <h:column>
 <f:facet name="header">Category</f:facet>#{category[0]}
 </h:column>
 <h:column>
 <f:facet name="header">Assigned</f:facet>
 <h:selectBooleanCheckbox id="categoryList" disabled="false"
 value="#{category[1] > 0}" />
 </h:column>
 <h:column>
 <f:facet name="header">Preferred</f:facet>
 <h:selectBooleanCheckbox id="PreferredList" disabled="false"
 value="#{category[2] == 1}" />
 </h:column>
 </h:dataTable>
 <h:commandButton id="savecategory" value="Save"
 action="#{categoryFinder.updateCategory}" />
</h:form>

When I click the submit button, the page is rerendered and and the altered check boxes are saved. But the action listener categoryFinder.updateCategory is not invoked - which means no database update has been taken place.

@Stateful
@Name("categoryFinder")
@Scope(ScopeType.CONVERSATION)
public class categoryFinderBean implements Serializable, CategoryFinderInterface
{
 @PersistenceContext
 private EntityManager entityManager;

 @DataModel
 private List categories;

 @RequestParameter
 private String id;

 @Begin
 @Factory("categories")
 public void initCategories()
 {
 try
 {
 //This is a native query which uses a JOIN on several tables
 String nativeQuery = "SELECT name, assigned, preferred FROM [...]";
 this.categories = entityManager.createNativeQuery(nativeQuery).getResultList();

 } catch (NoResultException e)
 {
 // ignore
 }
 }

 @End
 public void updateCategory()
 {
 return;
 }

 @Destroy
 @Remove
 public void destroy()
 {
 }
}

I tried to stick to the examples in the Seam documentation. Is there any suitable reason why this happens? I've been looking for a solution the wohle day now :(

[hstang]

"mrwaves" wrote:

.... which means no database update has been taken place.

 @End
 public void updateCategory()
 {
 return;
 }

Where's your database update code in here? Is this actually being called?

No where in the code you provided are you updating the checkboxes values in the database

[mrwaves]

The return command is just for setting up a debugger breakpoint.
Since the debugger didn't stop there, I entered no code yet.

[mrwaves]

Ok, I just found out that it behaves the way it does for the strange file upload issue. If I comment out the dataTable part inside the form, the action listener is called.

I am using JBoss AS 4.0.5.GA, JBoss Seam 1.2.1.GA and JDK 1.6/1.5.

No matter which JDK I use to compile my source code, the behaviour is still the same.

[pmuir]

Any output from h:messages?

[mrwaves]

Yes, there is.

But, unfortunately, I was not able to see it since the messages' attribute globalOnly was set to "true".

The message it displays now is as follows:

"category.xhtml @385,38 value="#{category[1] > 0}": Illegal Syntax for Set Operation".

At least something to investigate further ....