Re: Can I pass a param to the backing bean method?

[Cosma Colanicchia]

You cannot pass directly a parameter to your backing bean method using EL. The wiki entry shows some alternative way to pass one parameter putting it somewhere (managed-bean property, request parameter, ...) and having your backing bean method retrieve its value.

I can't see why this approach doesn't fit your scenario. BTW, why your detail dataTable should be nested in the master one? That way you would have *every* row of the master list include its own detail list (thus you don't ever need to pass the "selected" id).

Example:
<t:dataTable id="foo1" var="list" value="#{test.list}">
    ......
   <t:column>
      ......
      <h:commandLink value="Select this item" action="" test.loadSubList}">
         <t:updateActionListener property="#{test.selectedItem}" value="#{list.itemId}"/>
      </h:commandLink>
   <t:column>
</t:dataTable>

<t:dataTable id="foo2" var="video" value="#{test.subList}">
    ......
</t:dataTable>

In your backing bean:

private String selectedItem = null;
public void setSelectedItem(String selectedItem) {
  this.selectedItem = selectedItem;
}
public String getSelectedItem() {
  return this.selectedItem;
}

public List getSubList() {
  // load the list
  ...
  if (this.selectedItem != null) {
    return myListObject.getSubList(this.selectedItem);
  } else {
    return java.util.Collections.EMPTY_LIST;
  }
}


Cosma

2006/6/13, Hailong Zhang <[EMAIL PROTECTED]>:

Hi Adam,
    I have read the wiki, but I think this can not solve my problem. My scenario seems like master/detail, but the master/detail must be displayed in the same page.

    Any other solutions?

Thank you!

2006/6/13, Adam Brod <[EMAIL PROTECTED]>:

This wiki page talks about how to do this:

http://wiki.apache.org/myfaces/ExecutingMethodsFromLinkButtonParameters

Adam Brod
Product Development Team

"Hailong Zhang" <[EMAIL PROTECTED]> 06/12/2006 01:18 PM Please respond to "MyFaces Discussion" <users@myfaces.apache.org>

To users@myfaces.apache.org cc Subject Can I pass a param to the backing bean method?

For example:
<t:dataTable id="foo1" var="list" value="#{test.list">
   ......
   <t:dataTable id="foo2" var="video" value="#{test.subList}">
   ......
   </t:dataTable>
</t:dataTable>

The subList is determined by a property of list but how can I pass the property to test.getSubList() ?

Thank you!

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