如何在验证失败后

如何在验证失败后

本文介绍了使用新值更新表单时,如何在验证失败后重置表单中的输入字段的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我在 PrimeFaces 4.0 中使用 JSF 2.

I'm using JSF 2 with PrimeFaces 4.0.

我有一个包含一些输入和验证的表单.从对话框中选择实体时,某些字段可能会自动填充.当我在提交整个表单(并验证)之前选择实体时,这很好用.但是当我在验证后选择一个实体时,组件的更新不起作用.

I have a form with some inputs and validation. Some fields may automatically filled when choosing an entity from a dialog. This works fine when I choose the entity before I submit the whole form (and validate). But when I choose an entity after validation the update of the component does not work.

JSF 页面:

<h:form id="form">
    <p:inputText id="id" value="#{bean.user.id}" required="true"
        onclick="PF('usersDialog').show()" />
    <p:inputText id="name" value="#{bean.user.name}" required="true"
        onclick="PF('usersDialog').show()" />
    <p:commandButton value="submit" action="#{bean.submit}" update=":form" />
</h:form>

<p:dialog widgetVar="usersDialog">
    <h:form>
        <p:dataTable value="#{bean.users}" var="user">
            <p:column>
                <p:commandButton value="choose" onclick="PF('usersDialog').hide()"
                    process="@this" action="#{bean.select(user)}" update=":form" />
            </p:column>
            <p:column>
                <h:outputText value="#{user.name}" />
            </p:column>
        </p:dataTable>
    </h:form>
</p:dialog>

我知道这取决于 JSF 生命周期,但我无法修复它.那么,从对话框中选择新实体时,如何在验证失败后更新表单?

I know its up to the JSF lifecycle, but I'm not able to fix it.So how can I update the form after validation fail when choosing an new entity from dialog?

提前致谢.

推荐答案

正是为了这个目的, 组件 被引入(基于 OmniFaces ResetInputAjaxActionListener).

Exactly for this purpose, <p:resetInput> component was introduced (based on OmniFaces ResetInputAjaxActionListener).

将其嵌套在命令按钮内,将 target 设置为与命令按钮的 update 属性相同的客户端 ID:

Nest it inside the command button, with a target set to the same client ID as update attribute of command button:

<p:commandButton ... update=":form">
    <p:resetInput target=":form" />
</p:commandButton>

另见:

08-12 10:23