如何防止PrimeFaces民意调查清除FacesMessages? [英] How to prevent PrimeFaces poll from clearing FacesMessages?

问题描述

我正在使用PrimeFaces民意调查组件刷新一些内容.

I'm using PrimeFaces poll component to refresh some content.

<h:form id="formBsvtt">
  <p:messages autoUpdate="true" showDetail="false" />
  <p:outputPanel id="panelOut" layout="block">
    ...
    ... content to refresh
    ...
  </p:outputPanel>
  <p:panelGrid id="panelIn" layout="block">
    ...
    ... various input components with validation
    ...
  </p:panelGrid>
  <p:poll widgetVar="poll1" autoStart="true" global="false" interval="15" 
    partialSubmit="true" process="@this" update="panelOut"
    listener="#{myBean.myListener}">
  </p:poll>
</h:form>

如您所见，我正在使用具有autoUpdate = true的消息.我的问题是:在验证错误的情况下，将显示FacesMessages，但不迟于15秒消失.

As you can see I'm using messages with autoUpdate=true. My Problem is: In case of validation errors FacesMessages will be shown, but disappear not later than 15 seconds.

是否可以在不设置消息autoUpdate = false的情况下防止民意调查清除FacesMessages?

Is it possible to prevent poll from clearing FacesMessages without setting messages autoUpdate=false?

我的Web应用程序比上面指定的代码段大得多，我的目的不是在每种可能的情况下手动更新消息！

My web application is much bigger as code snippet specified above and my intention is not updating messages manually in each possible case!

推荐答案

PrimeFaces 2.x/3.x

这在本地是不可能的，因此需要技巧.在<p:messages>的rendered属性中，检查是否触发了<p:poll>，如果已触发，则返回false.这样，JSF认为在呈现期间组件树中没有自动更新的消息组件，因此将其忽略.

PrimeFaces 2.x/3.x

This is not natively possible, so a trick is needed. In the rendered attribute of <p:messages>, check if <p:poll> was been triggered and if so, then return false. This way JSF thinks there's no auto-updatable messages component in the component tree during rendering and will therefore ignore it.

如果触发了<p:poll>，则其客户端ID将显示为javax.faces.source请求参数.因此，应该这样做:

If the <p:poll> is triggered, then its client ID appears as javax.faces.source request parameter. So, this should do:

<p:messages ... rendered="#{param['javax.faces.source'] ne poll.clientId}" />
...
<p:poll binding="#{poll}" ... />

(注意:不需要其他bean属性)

所有PrimeFaces命令组件都有一个新的ignoreAutoUpdate属性，您可以将其设置为false，以忽略ajax更新中的所有autoUpdate="true"组件.

All PrimeFaces command components got a new ignoreAutoUpdate attribute which you could set to false to ignore all autoUpdate="true" components in the ajax update.

<p:poll ... ignoreAutoUpdate="true" />

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