这是Primefaces错误还是Mojarra/MyFaces错误

Question

我不能似乎能当我内触发事件column的dataTable.这是我简单的演示

<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有很多嵌套UIData组件的问题,所以我试过Mojarra 2.1.4,仍然没有解决问题.我试过Myfaces 2.1.5,仍然无法正常工作!这是Primefaces的错误吗？我甚至使用它h:panelGroup作为包装,update但它仍然无法正常工作.

编辑:事实证明,p:tree上面dataTable是单击时未触发事件的根本原因commandButton.如果我删除它p:tree然后立即工作.请注意p:tree,当我单击checkout时,本身工作得很好,事件在我的托管bean上触发.

Answer 1

这是你自己的代码中的一个错误.

<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>期望引用类型的属性TreeNode[]而不是TreeNode(请注意[消息中类标识符的前缀,表示数组类型).所以,相应地修复它:

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

同

private TreeNode[] selectedNodes;

无论如何,你都在<p:tree>和<p:dataTable>一和相同的"神"的形式中.因此,其中任何一个中的任何操作都将提交其他组件上的所有内容.如果树和表彼此没有任何关系,那么它们应该各自放置在它们自己的位置<h:form>.或者,您必须process向命令链接/按钮添加属性,以仅处理感兴趣的包含组件,例如process="mytable"在表格内的按钮上.