仅在这些消息存在的情况下，如何在带有要求的消息的素面中显示弹出窗口? [英] How to show a popup in primefaces with the requiredMessages, only if these messages exist?

问题描述

当我单击提交按钮时，我想显示一个带有某些inputText字段的requiredMessages的弹出窗口.但是仅在有这些消息的情况下.我尝试在oncomplete标记上使用bean变量和javascript，但无法使其正常运行.如果我在p:dialog中放置visible ="true"，则始终显示弹出窗口，尽管我尝试通过commandButton对其进行控制.现在，我有了这个，但是从不显示弹出窗口:

I want to show a popup with the requiredMessages of some inputText fields when I click on a submit button. But just only in case of there are those messages. I have tried with bean variable and javascript on the oncomplete tag, but I'm not able to make it work properly. If I put visible="true" in p:dialog, the popup is always displayed, although I try to control it from the commandButton. Now, I have this, but the popup is never displayed:

<h:inputText id="Scheme" 
            required="true"
            requiredMessage="Required.">
</h:inputText>

<h:commandButton id="submitModify" value="#{msg['systemdetail.modify']}"
             action="#{sistem.modify}"
             oncomplete="if (#{facesContext.maximumSeverity != null}) {dlg1.show();}">
</h:commandButton>

<p:dialog id="popup"
          style="text-align:center"
          widgetVar="dlg1"
          modal="true">  
    <h:messages layout="table"/>
</p:dialog> 

我该怎么做?预先感谢.

How can I do this? Thanks in advance.

推荐答案

标准JSF和PrimeFaces在on*属性中不支持基于请求的EL评估. RichFaces是唯一支持该功能的人.此外，标准JSF <h:commandButton>根本没有oncomplete属性.您可能对PrimeFaces <p:commandButton>

Standard JSF and PrimeFaces does not support request based EL evaluation in on* attributes. RichFaces is the only who supports that. Besides, the standard JSF <h:commandButton> does not have an oncomplete attribute at all. You're probably confusing with PrimeFaces <p:commandButton>

有几种方法可以做到这一点:

There are several ways to achieve this:

• 请改为在<p:dialog>的visible属性中检查条件.

<p:dialog visible="#{not empty facesContext.messageList}">

或者如果您只想显示验证消息而不是所有消息

or if you want to show validation messages only instead of all messages

<p:dialog visible="#{facesContext.validationFailed}">

---

使用PrimeFaces <p:commandButton>代替，PrimeFaces JS API也通过args对象支持#{facesContext.validationFailed}条件:

---

Use PrimeFaces <p:commandButton> instead, the PrimeFaces JS API supports the #{facesContext.validationFailed} condition through the args object as well:

<p:commandButton ... oncomplete="if (args.validationFailed) dlg1.show()" />

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