有一些未处理的FacesMessages,这意味着并非每个FacesMessage都有机会被渲染 [英] There are some unhandled FacesMessages, this means not every FacesMessage had a chance to be rendered
问题描述
我有一个JSF 2.1 + PrimeFaces 3.3页面:
I have a JSF 2.1 + PrimeFaces 3.3 page:
<h:form id="particluar">
<p:message id="msg" globalOnly="true" display="text"/>
<h:panelGrid columns="2" id="test">
<h:panelGrid id="panel2" columns="3">
<p:inputText id="name1" value="Student.studentID" required="true"/>
<p:commandButton value="Check Name" actionListener="#{Student.abc}" process="name1" update="panel2" />
<p:message id="msg1" for="name1" display="text"/>
</h:panelGrid>
<p:inputText id="name2" required="true"/>
<p:message id="msg2" for="name2" display="text"/>
<p:inputText id="name3" required="true"/>
<p:message id="msg3" for="name3" display="text"/>
</h:panelGrid>
<p:commandButton value="submit" actionListener="#{Student.xyz}" update="particluar" />
</h:form>
我试图在名称无效时手动添加面孔消息:
I'm trying to manually add faces messages when the name is invalid:
public void xyz() {
if (name1.equals("primefaces")) {
FacesContext.getCurrentInstance().addMessage("msg1", new FacesMessage(FacesMessage.SEVERITY_ERROR,"Invalid Name", "Invalid Name"));
}
if (name2.equals("primefaces")) {
FacesContext.getCurrentInstance().addMessage("msg2", new FacesMessage(FacesMessage.SEVERITY_ERROR,"Invalid Name", "Invalid Name"));
}
if (name3.equals("primefaces")) {
FacesContext.getCurrentInstance().addMessage("msg3", new FacesMessage(FacesMessage.SEVERITY_ERROR,"Invalid Name", "Invalid Name"));
}
}
但是它们没有出现,并且服务器日志继续打印以下警告:
But they do not show up and the server log keeps printing the following warning:
有一些未处理的FacesMessages,这意味着并非每个 FacesMessage有机会被渲染
There are some unhandled FacesMessages, this means not every FacesMessage had a chance to be rendered
如何在页面中显示它们?
How do I show them in the page?
第二个问题,如果我提交的表单中有三个空的输入字段,则在与<p:inputText>
关联的每个<p:message>
中都会显示必需的输入错误消息".如何在<p:message globalOnly="true">
中显示它们?
And, a second question, if I submit the form with three empty input fields, it shows "required input error message" in each <p:message>
associated with the <p:inputText>
. How do I show them in the <p:message globalOnly="true">
?
推荐答案
如何在页面中显示它们?
您需要指定一个有效的客户端ID.客户端ID与组件ID不同.客户端ID是您在JSF生成的HTML输出中看到的任何内容.另外,客户端ID应该是输入组件之一,而不是消息组件.
You need to specify a valid client ID. The client ID is not the same as component ID. The client ID is whatever you see in the JSF-generated HTML output. Also, the client ID should be the one of the input component, not of the message component.
所以,给定
<h:form id="particular">
<p:inputText id="name1" />
<p:message id="msg1" for="name1" />
</h:form>
输入组件的客户端ID为particular:name1
(在浏览器中右键单击页面,然后执行查看源代码自己查看).因此,该消息应恰好附加在此客户端ID上.
the input component has the client ID particular:name1
(rightclick page in browser and do View Source to see it yourself). So, the message should be attached on exactly this client ID.
context.addMessage("particular:name1", message);
第二个问题是,如果我提交的表单具有三个空的输入字段,则在与
<p:inputText>
关联的每个<p:message>
中都会显示必需的输入错误消息".如何在<p:message globalOnly="true">
中显示它们?
And, a second question, if I submit the form with three empty input fields, it shows "required input error message" in each
<p:message>
associated with the<p:inputText>
. How do I show them in the<p:message globalOnly="true">
?
<p:message>
不是为此的有效组件,您应该使用<p:messages>
.
The <p:message>
is not the valid component for that, you should use <p:messages>
.
<p:messages id="msg" globalOnly="true" display="text"/>
globalOnly="true"
属性表示仅显示具有null
客户端ID的消息.因此,您应该只添加这样的消息.
The globalOnly="true"
attribute means that only messages with a null
client ID will be shown. So, you should just add exactly such a message.
context.addMessage(null, message);
另请参见:
- 如何更好地使用JSF h:messages?
- 何时以及如何在JSF中生成clientID?
- How to use JSF h:messages better?
- When and how is clientID generated in JSF?
See also:
无关与具体问题无关,您要在其中添加的非全局消息(无效名称")实际上应该由一个有资格的验证者来完成.另请参见
Unrelated to the concrete problem, the non-global messages ("Invalid name") which you're trying to add there should actually be done by a fullworthy validator. See also How to perform validation in JSF, how to create a custom validator in JSF for a concrete example.
这篇关于有一些未处理的FacesMessages,这意味着并非每个FacesMessage都有机会被渲染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!