在模板中获取父命名容器的 id 以用于渲染/更新属性 [英] Get id of parent naming container in template for in render / update attribute
问题描述
我有一个模板,在它的定义中我使用了几个表单和按钮.
I have a template and in its Definition I use several forms and buttons.
问题是定义(define)的xhtml文件不知道组件层次结构.
The problem is the definition (define) xhtml file does not know the component hierarchy.
例如,我想在同一个定义文件中以不同的形式更新元素table2".
And for example I want to update the element "table2" in a different form in the same define file.
模板插入:
<p:tabView id="nav"> <!-- nav -->
<ui:insert name="content_nav">content navigation</ui:insert>
</p:tabView>
定义我的层次结构导航"的第一级
defines the first level of my hierarchy "nav"
模板定义:
<ui:define name="content_nav">
<h:form id="form1"> <!-- nav:form1 -->
<h:dataTable id="table1"/> <!-- nav:form1:table1 -->
<p:inputText value="#{bean.value}"/>
<p:commandButton action="..." update="nav:form2:table2"/>
</h:form>
<h:form id="form2">
<h:dataTable id="table2"/> <!-- nav:form2:table2 -->
<!-- other elements -->
</h:form>
</ui:define>
在我的定义部分,我不想知道导航"!
In my define part I don't want to know "nav"!
我该怎么做?或者如何将一个命名组件向上移动?或将最高的父完整 ID 保存在变量中?
How can I do this? or how can I move one naming component upwards?, or save the highest parent complete id in a variable?
有时我会看到类似的东西:
sometimes i saw something like:
update=":table2"
但我找不到有关此的任何信息?JavaEE 6 文档只提到了@ 关键字.
But I could not find any informations about this?, the JavaEE 6 documentation just mentions the @ keywords.
推荐答案
丑陋,但这应该适合你:
Ugly, but this should work out for you:
<p:commandButton action="..." update=":#{component.namingContainer.parent.namingContainer.clientId}:form2:table2" />
由于您已经在使用 PrimeFaces,另一种方法是使用 #{p:component(componentId)}
,此辅助函数会扫描具有给定 ID 的组件的整个视图根,然后返回其客户端 ID:
As you're already using PrimeFaces, an alternative is to use #{p:component(componentId)}
, this helper function scans the entire view root for a component with the given ID and then returns its client ID:
<p:commandButton action="..." update=":#{p:component('table2')}" />
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