f:param标签属性'disable'不起作用 [英] f:param tag attribute 'disable' is not work

问题描述

根据我的某些情况，我尝试使用<f:param>标记构建带有参数的输出链接URL.

I try to use <f:param> tag to build output link URL with parameters depending on some my conditions.

当我将此标签放在h:output链接中并尝试为禁用"设置不同的值时，我看不到任何效果.

When I place this tag inside h:output link and try to set different values for 'disable' I see no effect.

这是我的代码

<h:outputLink value="/WebApplication10/faces/index.xhtml">
    Link1
    <f:param disable="#{true}" name="name1" value="value1"/>            
    <f:param disable="#{false}" name="name2" value="value2"/> 
</h:outputLink> 

我希望在url中仅看到一个参数，但同时看到两者.

I expect to see only one param in url but I see both.

推荐答案

使用disable="true"代替disable="#{true}"对我有用.

因此，这是标记文档中的错误表示它支持ValueExpression或UIParameter类中的错误，该错误不能将其解析为ValueExpression.我至少为此报告了问题2102 .

So, it's either a bug in the tag documentation that it supports ValueExpression or a bug in the UIParameter class that it does not resolve it as a ValueExpression. I have at least reported issue 2102 for this.

更新:作为临时的解决方法，您可以使用<c:if>来控制在视图构建期间包含<f:param>标记.

Update: As a temporary hack/workaround, you could use <c:if> to control the inclusion of the <f:param> tag during view build time.

<h:outputLink value="/WebApplication10/faces/index.xhtml">
    Link1
    <c:if test="#{!true}"><f:param name="name1" value="value1"/></c:if>
    <c:if test="#{!false}"><f:param name="name2" value="value2"/></c:if>
</h:outputLink> 

请注意，当此代码嵌入到<ui:repeat>，<h:dataTable>等on的JSF迭代组件中并且test条件取决于迭代变量时，这将行不通.

Note that this is not going to work when this piece is embedded in a JSF iterated component such as <ui:repeat>, <h:dataTable> and on and the test condition depends on the iterated variable.

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