[英]primefaces update attribute not working
Whenever I run the following code on Home.xhtml page, I get the following exception. 每当我在Home.xhtml页面上运行以下代码时,都会收到以下异常。 I try to call the contents of panel with id = items
but without success. 我尝试用id = items
调用面板的内容,但是没有成功。 It says that compiler cannot find the component with items
identifier. 它说编译器找不到带有items
标识符的组件。
1)part of Home.xhtml 1)Home.xhtml的一部分
<h:form>
<p:commandButton type="submit" value="Speak Out" action="#{statusBean.save}" ajax="true" styleClass="buttonstyle" update="items"/>
</h:form>
<p:panel id="items">
//content
</p:panel>
2)Exception 2)例外
Mar 12, 2013 1:38:04 AM com.sun.faces.application.view.FaceletViewHandlingStrategy handleRenderException
SEVERE: Error Rendering View[/Home.xhtml]
javax.faces.FacesException: Cannot find component with identifier "items" in view.
at org.primefaces.util.ComponentUtils.findClientIds(ComponentUtils.java:249)
at org.primefaces.renderkit.CoreRenderer.buildAjaxRequest(CoreRenderer.java:222)
at org.primefaces.component.commandbutton.CommandButtonRenderer.encodeMarkup(CommandButtonRenderer.java:81)
at org.primefaces.component.commandbutton.CommandButtonRenderer.encodeEnd(CommandButtonRenderer.java:53)
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:879)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1650)
at javax.faces.render.Renderer.encodeChildren(Renderer.java:164)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:849)
at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.java:300)
at com.sun.faces.renderkit.html_basic.GridRenderer.renderRow(GridRenderer.java:181)
at com.sun.faces.renderkit.html_basic.GridRenderer.encodeChildren(GridRenderer.java:125)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:849)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1643)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1646)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1646)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:389)
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:127)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:117)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:97)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:135)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:309)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:79)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1001)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
Mar 12, 2013 1:38:04 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [Faces Servlet] in context with path [/FreeBird_v.6] threw exception [Cannot find component with identifier "items" in view.] with root cause
javax.faces.FacesException: Cannot find component with identifier "items" in view.
at org.primefaces.util.ComponentUtils.findClientIds(ComponentUtils.java:249)
at org.primefaces.renderkit.CoreRenderer.buildAjaxRequest(CoreRenderer.java:222)
at org.primefaces.component.commandbutton.CommandButtonRenderer.encodeMarkup(CommandButtonRenderer.java:81)
at org.primefaces.component.commandbutton.CommandButtonRenderer.encodeEnd(CommandButtonRenderer.java:53)
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:879)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1650)
at javax.faces.render.Renderer.encodeChildren(Renderer.java:164)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:849)
at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.java:300)
at com.sun.faces.renderkit.html_basic.GridRenderer.renderRow(GridRenderer.java:181)
at com.sun.faces.renderkit.html_basic.GridRenderer.encodeChildren(GridRenderer.java:125)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:849)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1643)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1646)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1646)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:389)
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:127)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:117)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:97)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:135)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:309)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:79)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1001)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
Okey, shortly you should try :items
, because it's outside the component tree. Okey,不久您应该尝试:items
,因为它在组件树之外。 And for more details of using ajax behavior of primefaces you can check the examples in showcase from here . 有关使用primefaces的ajax行为的更多详细信息,您可以从此处查看展示中的示例。 In addition you can use firebug in this case to observe your components. 此外,在这种情况下,您可以使用Firebug来观察您的组件。 EDIT: After BalusC's warning, it's correct that your problem lies on not due to the it's not inside the same component tree, because it's not in the same NamingContainer. 编辑:在BalusC的警告之后,正确的是您的问题出在不是由于它不在同一组件树中,因为它不在同一NamingContainer中。
Standard components like h: form
, f: subview
and h: dataTable
are naming containers. h: form
, f: subview
和h: dataTable
等标准组件是命名容器。 Most sets of components possess in some naming containers, so in your case it's outside of the tag for that reason :items
will be correct way to refer it. 大多数组件集都包含在某些命名容器中,因此,在这种情况下,它在标记之外是因为:items
将是引用它的正确方法。
Please refer to these posts help you understand the topic nicely: 请参考这些帖子,以帮助您更好地理解该主题:
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