重置输入字段而不执行验证 [英] Reset input fields without executing validation

问题描述

我的Facelets视图如下:

I have a Facelets view as below:

<h:form id="f1">
<p:panelGrid id="p1" columns="2"> 
<p: inputText value="Distance Travelled::/><p:inputText value="#{airTransportUsage.distance}" immediate="true"
required="true" requiredMessage="Distance Travelled Field cannot be left blank.."
converterMessage="Distance Travelled must be a number"
validatorMessage="Distance Travelled must be a valid number.."
id="dis">
<f:validateLongRange minimum="1"/>
</p:inputText>
<p:commandButton value="Reset" action="#{airTransportUsage.reset}" update=":f1:p1" />
</p:panelGrid>
</h:form>

单击重置按钮时，由于验证，永远无法执行相应的方法.我不能在重置按钮上使用immediate="true"，因为它会带来其他一些问题.

When the reset button is clicked, the corresponding method can never be executed due to validation. I can't use immediate="true" on my reset button as it creates some other problems.

推荐答案

默认情况下，<p:commandButton>实际上处理整个表单(process="@form")，您可以通过在process属性中仅指定当前组件来更改此格式

The <p:commandButton> processes indeed by default the entire form (process="@form"), you can change this by specifying only the current component in the process attribute.

<p:commandButton value="Reset" ... process="@this" />

但是，如果表单已经预先验证，这将失败.标记为无效的输入字段将不会使用新的模型值(您已自行重置)更新.如果您使用的是PrimeFaces 3.4，则将 <p:resetInput> 嵌入按钮:

However, this will fail if the form is already been validated beforehand. The input fields which have been marked invalid won't be updated with the new model value (which you've resetted yourself). If you're using PrimeFaces 3.4, then embed <p:resetInput> in the button:

<p:commandButton value="Reset" ... process="@this">
    <p:resetInput target="@form" />
</p:commandButton>

如果您尚未使用PrimeFaces 3.4，并且无法升级到它，则可以使用OmniFaces ResetInputAjaxActionListener .

If you aren't on PrimeFaces 3.4 yet and can't upgrade to it, you can use OmniFaces ResetInputAjaxActionListener for this.

另一种完全不同的选择是通过新的GET请求刷新当前页面.

A completely different alternative is to just refresh the current page by a fresh new GET request.

<p:button value="Reset" />

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