JSF RichFaces A4J:支持迁移到A4J:AJAX [英] Jsf RichFaces a4j:support migration to a4j:ajax
问题描述
我无法将此代码从 JSF 1.2 应用程序转换为 JSF 2.x 应用程序中的等效代码
I have problem with converting this code from JSF 1.2 application to equivalent in JSF 2.x application
<h:selectOneMenu id="type" value="#{bean.type}">
<f:selectItems value="#{bean.typeList}"/>
<a4j:support event="onchange"
ajaxSingle="false"
immediate="true"
reRender="myForm">
<a4j:actionparam name="type"
value="this.value"
assignTo="#{bean.type}"
noEscape="true"/>
</a4j:support>
</h:selectOneMenu>
此代码段的工作方式.
根据在#{bean.type}
中选择的值,我的页面显示不同的字段.当用户更改"type"
字段时,将重新呈现整个表单,但不进行表单验证( ajaxSingle ="false",instant ="true",reRender ="myForm"
)
Depending on selected value in #{bean.type}
, my page display different fields.
When User change "type"
field the whole form is rerendered, but without form validation (ajaxSingle="false", immediate="true", reRender="myForm"
).
我不想在这里验证filds,我只想将新值设置为#{bean.type}
并重新渲染页面以显示不同的字段(取决于#{bean.type}
).这就是为什么我需要在 a4j:actionparam
内手动设置#{bean.type}
的原因.
I don't want to validate filds here, I just want to set new value to the #{bean.type}
and rerender the page in order to show different fields (depending on #{bean.type}
).
Thats why i need to manualy set #{bean.type}
inside a4j:actionparam
.
此代码的一个不错的功能是,其他字段中的提交值在重新呈现后会保留下来.
The nice feature about this code is that submited values in other fileds are preserved after rerendering.
我正在尝试在 JSF 2.x 中执行相同的操作,但未成功:
I am trying to do the same thing in JSF 2.x with no success:
<h:selectOneMenu iid="type" value="#{bean.type}">
<f:selectItems value="#{bean.typeList}"/>
<a4j:ajax event="valueChange" render="@form" execute="@this"/>
</h:selectOneMenu>
此:
<a4j:ajax event="valueChange" render="@form" execute="@this"/>
将重新提交整个表格,而我将从其他字段中丢失提交的值
will rerender whole form and I will lose submited values form other fields
此:
<a4j:ajax event="valueChange" render="@form" execute="@form"/>
将提交,验证和重新提交整个表单(我想像 JSF 1.2 一样提交未经验证的邮件)
will submit, validate and rerender whole form (i want just submit without validation like in JSF 1.2)
此:
<a4j:ajax event="valueChange" render="@form" execute="@form" immediate="true"/>
也不起作用(与上述相同)
also does not work (work same as above)
所以我的问题是如何在 JSF 2.x 中实现相同的行为?
So my question is how can I achive the same behavior in JSF 2.x ?
谢谢
推荐答案
感谢Andrey评论,我找到了解决方法:
Thanks to Andrey comment I found solution:
<h:selectOneMenu id="type"
value="#{bean.type}"
valueChangeListener="#{bean.typeChangeListener}"
immediate="true">
<f:selectItems value="#{bean.typeList}"/>
<a4j:ajax execute="@form" render="@form" listener="#{facesContext.renderResponse}" immediate="true"/>
</h:selectOneMenu>
和:
public void typeChangeListener(ValueChangeEvent event) {
type = (String) event.getNewValue();
}
在a4j:ajax上立即执行会导致在应用请求值阶段期间调用listener =#{facesContext.renderResponse}",并且renderResponse跳过验证.
immediate on a4j:ajax causes that listener="#{facesContext.renderResponse}" is called during apply request values phase, and renderResponse skips validation.
在h:selectOneMenu上立即执行将导致在应用请求值阶段也调用valueChangeListener.
immediate on h:selectOneMenu causes that valueChangeListener is also called during apply request values phase.
因此,我可以提交整个表单而无需进行验证,设置类型,根据更改的类型重新呈现新字段以及将提交的值保留在其他文件中.
So I can submit whole form without validation, set type, rerender new fields based on changed type, and preserve submited values in other fileds.
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