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From "John Smith (JIRA)" <...@myfaces.apache.org>
Subject [jira] [Created] (TOMAHAWK-1661) dataTable value evaluated if parent component not rendered if preserveDataModel is true
Date Thu, 28 Mar 2013 15:09:15 GMT
John Smith created TOMAHAWK-1661:
------------------------------------

             Summary: dataTable value evaluated if parent component not rendered if preserveDataModel
is true
                 Key: TOMAHAWK-1661
                 URL: https://issues.apache.org/jira/browse/TOMAHAWK-1661
             Project: MyFaces Tomahawk
          Issue Type: Bug
    Affects Versions: 1.1.14
            Reporter: John Smith


If a t:dataTable's parent component's rendered attribute evaluates to false, the dataTable's
value attribute is still evaluated if the dataTable has the preserveDataModel attribute set
to true.

While I don't think this strictly violates the spec (it says under 2.2.6: 'If the isRendered()
method of a component returns false, the renderer for that component must not generate any
markup, and none of its facets or children (if any) should be rendered.'), it is at the very
least inconsistent with other JSF components, which do not evaluate the value if not rendered

Example:
<html xmlns="http://www.w3.org/1999/xhtml"
	  xmlns:h="http://java.sun.com/jsf/html"
	  xmlns:t="http://myfaces.apache.org/tomahawk" >
	<h:head />
	<h:body>
		<h:form>
			<h:panelGroup rendered="false">
				<t:dataTable value="#{bean.list}" var="list" preserveDataModel="true" >
					<h:column>#{list}</h:column>
				</t:dataTable>
			</h:panelGroup>
			</h:form>
	</h:body>
</html>
-------------------------------------------------
@RequestScoped
@ManagedBean
public class Bean {
	public List<String> getList(){
		throw new RuntimeException("this should not be called");
	}
}

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