动态的"for" p:tooltip的属性无法按预期工作 [英] Dynamic "for" property of p:tooltip does not work as expected
问题描述
我试图将optips附加到ui:repeat循环中的commandButtons.我也动态创建commandButtons的ID，也创建工具提示的"for"属性.这给出了以下错误:
I am trying to attach tooptips to commandButtons in a ui:repeat loop. I create ids of commandButtons dynamically and "for" properties of tooltips too. This gives following error:
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: Cannot find component "a_test" in view.
javax.faces.webapp.FacesServlet.service(FacesServlet.java:325)
org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:79)
root cause
javax.faces.FacesException: Cannot find component "a_test" in view.
org.primefaces.component.tooltip.TooltipRenderer.getTarget(TooltipRenderer.java:93)
org.primefaces.component.tooltip.TooltipRenderer.encodeScript(TooltipRenderer.java:66)
org.primefaces.component.tooltip.TooltipRenderer.encodeEnd(TooltipRenderer.java:35)
javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:883)
javax.faces.component.UIComponent.encodeAll(UIComponent.java:1659)
com.sun.faces.facelets.component.RepeatRenderer.encodeChildren(RepeatRenderer.java:104)
com.sun.faces.facelets.component.UIRepeat.process(UIRepeat.java:504)
com.sun.faces.facelets.component.UIRepeat.encodeChildren(UIRepeat.java:958)
javax.faces.component.UIComponent.encodeAll(UIComponent.java:1652)
javax.faces.render.Renderer.encodeChildren(Renderer.java:168)
javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:853)
javax.faces.component.UIComponent.encodeAll(UIComponent.java:1652)
javax.faces.component.UIComponent.encodeAll(UIComponent.java:1655)
com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:399)
com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131)
com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121)
com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:313)
org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:79)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.12 logs.
Apache Tomcat/7.0.12
我的jsf如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:p="http://primefaces.org/ui"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets">
<h:head></h:head>
<h:form id="MyForm">
<ui:repeat var="rs"
value="#{rezervasyonBean.rezervasyonSaatleriListesi}">
<p:commandButton action="#" value="#{rs.saatAraligi}"
update="@form"
id="#{rs.saatAraligi}_test"
/>
<p:tooltip for="#{rs.saatAraligi}_test" value="test text"/>
</ui:repeat>
</h:form>
</html>
rezervasyonBean.rezervasyonSaatleriListesi是列表，而rs.saatAraligi的元素是a，b，c.
rezervasyonBean.rezervasyonSaatleriListesi is as list and elements of the rs.saatAraligi are a,b,c.
我的问题是:如何以相同的方式动态识别ui组件和p:tooltip的"for"属性?
My question is: how can I identify ui components dynamically and "for" attribute of p:tooltip in the same way?
致谢.
推荐答案
在视图构建期间评估JSF UI组件的ID属性，但是<ui:repeat>在视图呈现期间运行，因此#{rs.saatAraligi}将评估为null，因此命令按钮的ID始终为_test.
The ID attribute of JSF UI components is evaluated during view build time, however the <ui:repeat> runs during view render time and thus #{rs.saatAraligi} would evaluate to null and hence the ID of the command button would always be _test.
只需从id和for中删除#{rs.saatAraligi}表达式.您在这里不需要它. JSF将自动为<ui:repeat>的迭代索引添加前缀，从而确保ID的唯一性.
Just remove the #{rs.saatAraligi} expression from the id and for. You don't need it here. JSF will automatically prefix the iteration index of <ui:repeat> and thus ensure uniqueness of the ID.
<p:commandButton action="#" value="#{rs.saatAraligi}"
update="@form"
id="test"
/>
<p:tooltip for="test" value="test text"/>
另请参见:
- JSF2 Facelets中的JSTL ...有意义吗?-一样故事适用于JSF UI组件的
id属性 - JSTL in JSF2 Facelets... makes sense? - the same story applies to
idattribute of JSF UI components
See also:
这篇关于动态的"for" p:tooltip的属性无法按预期工作的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
