这是 Primefaces 错误还是 Mojarra/MyFaces 错误

当我在里面时，我似乎无法触发事件column of dataTable。这是我的简单演示

<h:form id="form">
    <!--This section of p:tree here seems to be the reason causing the event not fired when click the command button-->
    <p:tree value="#{viewBean.root}" var="node" dynamic="true" cache="false"  
                selectionMode="checkbox"  selection="#{treeBean.selectedNode}">  

        <p:ajax event="expand" update=":form:messages" listener="#{viewBean.onNodeExpand}" />  
        <p:ajax event="collapse" update=":form:messages" listener="#{viewBean.onNodeCollapse}" />  
        <p:ajax event="select" update=":form:messages" listener="#{viewBean.onNodeSelect}" />  
        <p:ajax event="unselect" update=":form:messages" listener="#{viewBean.onNodeUnselect}" />  

        <p:treeNode>  
            <h:outputText value="#{node}" />  
        </p:treeNode>  
    </p:tree>
    <h:panelGroup id="mygroup">
            <p:dataTable id="mytable" value="#{viewBean.foodList}" var="item">
                <p:column>
                    #{item}
                </p:column>
                <p:column>
                    <p:commandButton value="delete" 
                                     action="#{viewBean.delete}"
                                     update=":form:mygroup">
                        <f:setPropertyActionListener target="#{viewBean.selectedFood}"
                                                     value="#{item}"/>
                    </p:commandButton>
                </p:column>
            </p:dataTable>
    </h:panelGroup>
</h:form>

这是我的托管 bean

@ManagedBean
@ViewScoped
public class ViewBean {

    private TreeNode root;  

    private TreeNode selectedNode;  
    private List<String> foodList;

    private String selectedFood;

    @PostConstruct
    public void init(){

        foodList = new ArrayList<String>();
        foodList.add("Pizza");
        foodList.add("Pasta");
        foodList.add("Hamburger");

        root = new DefaultTreeNode("Root", null);  
        TreeNode node0 = new DefaultTreeNode("Node 0", root);  
        TreeNode node1 = new DefaultTreeNode("Node 1", root);  
        TreeNode node2 = new DefaultTreeNode("Node 2", root);  

        TreeNode node00 = new DefaultTreeNode("Node 0.0", node0);  
        TreeNode node01 = new DefaultTreeNode("Node 0.1", node0);  

        TreeNode node10 = new DefaultTreeNode("Node 1.0", node1);  
        TreeNode node11 = new DefaultTreeNode("Node 1.1", node1);  

        TreeNode node000 = new DefaultTreeNode("Node 0.0.0", node00);  
        TreeNode node001 = new DefaultTreeNode("Node 0.0.1", node00);  
        TreeNode node010 = new DefaultTreeNode("Node 0.1.0", node01);  

        TreeNode node100 = new DefaultTreeNode("Node 1.0.0", node10);  
    }

    public void delete(){

        foodList.remove(selectedFood);

    }
    //setter and getter

    public void onNodeExpand(NodeExpandEvent event) {  
       FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_INFO, "Expanded", event.getTreeNode().toString());  

       FacesContext.getCurrentInstance().addMessage(null, message);  
    }  

    public void onNodeCollapse(NodeCollapseEvent event) {  
       FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_INFO, "Collapsed", event.getTreeNode().toString());  

       FacesContext.getCurrentInstance().addMessage(null, message);  
    }  

    public void onNodeSelect(NodeSelectEvent event) {  
       FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_INFO, "Selected", event.getTreeNode().toString());  

       FacesContext.getCurrentInstance().addMessage(null, message);  
    }  

    public void onNodeUnselect(NodeUnselectEvent event) {  
        FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_INFO, "Unselected", event.getTreeNode().toString());  

        FacesContext.getCurrentInstance().addMessage(null, message);  
    }  
}

我的问题似乎是该事件没有被触发，这意味着delete永远不会被调用。

我环顾四周，知道 Mojarra 在嵌套 UIData 组件方面存在大量问题，所以我尝试了 Mojarra 2.1.4，仍然没有解决问题。我尝试了Myfaces 2.1.5，仍然不起作用！这是 Primefaces 的 bug 吗？我什至用h:panelGroup作为包装update但它仍然不起作用。

EDIT: 原来如此p:tree上面的dataTable是单击时未触发事件的根本原因commandButton。如果我删除p:tree然后它立即起作用。请注意，p:tree它本身工作得很好，当我点击结帐时，事件在我的托管 bean 上触发。

这是您自己的代码中的错误。

<partial-response>
  <error>
    <error-name>class javax.el.ELException</error-name>
    <error-message><![CDATA[/index.xhtml @15,84 selection="#{viewBean.selectedNode}": Cannot convert [Lorg.primefaces.model.TreeNode;@fd9b4d of type class [Lorg.primefaces.model.TreeNode; to interface org.primefaces.model.TreeNode]]></error-message>
  </error>
</partial-response>

具体的异常消息表明<p:tree selection>预计引用类型的属性TreeNode[]并不是TreeNode（注意[消息中类标识符的前缀，指示数组类型）。因此，相应地修复它：

<p:tree selection="#{treeBean.selectedNodes}">

with

private TreeNode[] selectedNodes;

无论如何，你们都拥有<p:tree> and <p:dataTable>在同一个“神”形态中。因此，其中任何一个组件中的任何操作也会提交另一个组件上的所有内容。如果树和表彼此没有任何关系，那么它们应该分别放置在自己的目录中<h:form>。或者，您必须添加一个process属性到命令链接/按钮以仅处理感兴趣的包含组件，例如process="mytable"在表格内的按钮上。