f：ui中的ajax：重复渲染h：outputText但无法渲染/更新h：inputText

I have a problem with <f:ajax> on a <h:inputText> inside <ui:repeat>. It successfully renders a <h:outputText> with the new value, but not a <h:inputText> (both are bound to the same property). However, if I change the <f:ajax> to render @form or @all, it works. But I obviously don't want/need to render the whole form.

我在 里面的 上遇到了 的问题。它成功地使用新值呈现 ,但不是 (两者都绑定到同一属性)。但是,如果我将 更改为渲染@form或@all,则可以正常工作。但我显然不希望/需要呈现整个表单。 ​​:ajax>

I'm using Mojarra 2.2.4. Here's the index.xhtml

我正在使用Mojarra 2.2.4。这是index.xhtml

<h:form>
    <table>
        <ui:repeat var="line" value="#{myBean.lines}">
            <tr>
                <td>
                    <h:inputText value="#{line.number}">
                        <f:ajax event="change" execute="@this" render="desc1 desc2" listener="#{myBean.onChangeLineNumber(line)}"/>
                    </h:inputText>
                </td>
                <td>
                    <h:inputText id="desc1" value="#{line.desc}"/>
                    <h:outputText id="desc2" value="#{line.desc}"/>
                </td>
            </tr>
        </ui:repeat>
    </table>
</h:form>

And here's the relevant bit of the @ViewScoped bean:

这是@ViewScoped bean的相关位:

public void onChangeLineNumber(Line line)
{
    line.setDesc("Some new text " + System.currentTimeMillis());
}

How is this caused and how can I solve it?

这是怎么造成的,如何解决?

1 个解决方案

#1

This is caused by a bug in state management of Mojarra's <ui:repeat> which is fixed as per issue 3215 as reported by my fellow Arjan Tijms (actually for a completely different problem, the fix just happens to solve exactly your problem as well). The fix is available in Mojarra 2.2.7. So upgrading to at least that version should do it.

这是由Mojarra的 状态管理中的一个错误造成的,根据我的同事Arjan Tijms报告的问题3215(实际上对于一个完全不同的问题,修复恰好也解决了你的问题) 。 Mojarra 2.2.7中提供了此修复程序。所以升级到至少那个版本应该这样做。

Otherwise, your best bet is to replace it by a <h:dataTable>, the component which is designed for exactly the functional requirement of rendering a HTML table based on a collection. It also saves some HTML boilerplate.

否则,最好的办法是用 替换它,该组件专为完全基于集合呈现HTML表的功能要求而设计。它还节省了一些HTML样板。

<h:form>
    <h:dataTable value="#{myBean.lines}" var="line">
        <h:column>
            <h:inputText value="#{line.number}">
                <f:ajax render="desc1 desc2" listener="#{myBean.onChangeLineNumber(line)}"/>
            </h:inputText>
        </h:column>
        <h:column>
            <h:inputText id="desc1" value="#{line.desc}"/>
            <h:outputText id="desc2" value="#{line.desc}"/>
        </h:column>
    </h:dataTable>
</h:form>

(note that I removed event="change" and execute="@this" from the <f:ajax> as those are the defaults already, there's no need to repeat the defaults)

(请注意,我从 中删除了event =“change”和execute =“@ this”,因为这些是默认值,没有必要重复默认值)