JSF f：ajax无法在上下文中找到组件

参见英文答案 > How to find out client ID of component for ajax update/render? Cannot find component with expression “foo” referenced from “bar”4个
我正在尝试从dataTable中的graphicImage更新一个dataTable.我尝试了很多f：ajax渲染值的组合,但没有成功,现在我使用的是PrimeFaces的p：component函数,但我之前得到了同样的错误.我在浏览器中收到此错误：

f:ajax contains an unknown id ‘j_idt690:painelTabelaAPDespesa’ – cannot locate it in the context of the component j_idt735

我用来刷新的代码：

<f:ajax event="click" render="#{p:component('painelTabelaAPDespesa')}"
                    listener="#{itensAPDespesa.removerItem(item)}" />

你怎么看这个f：ajax在一个数据表内的graphicImage里面.

<h:panelGroup id="painelTabelaAPDespesa">
        <p:dataTable id="tabelaAPDespesa" value="#{itensAPDespesa.itens}"
            var="item">
            <p:column>
                #{itensAPDespesa.itens.indexOf(item)+1}
            </p:column>
            <p:column>
                <f:facet name="header">
                    <h:outputText value="Número" />
                </f:facet>
                <hrgi:editableText style="width:33%"
                    value="#{item.numeroDocumento}" />
            </p:column>
            <p:column>
                <f:facet name="header">
                    <h:outputText value="Vencimento" />
                </f:facet>
                <hrgi:editableDate style="width:33%" value="#{item.dataVencimento}" />
            </p:column>
            <p:column>
                <f:facet name="header">
                    <h:outputText value="Valor" />
                </f:facet>
                <hrgi:editableCurrency style="width:33%" value="#{item.valor}">
                    <f:ajax render="@form" event="blur"
                        listener="#{itensAPDespesa.adicionarItem(item)}"
                        onevent="mudarFocoParaCampoInexistente(this.id)" />
                </hrgi:editableCurrency>
            </p:column>
            <p:column>
                <f:facet name="header">
                    <h:outputText value="Remover" />
                </f:facet>
                <h:graphicImage library="img" name="default_trash.png"
                    style="cursor:pointer;">
                    <f:ajax event="click" render="#{p:component('painelTabelaAPDespesa')}"
                        listener="#{itensAPDespesa.removerItem(item)}" />
                </h:graphicImage>
            </p:column>
        </p:dataTable>
        <h:outputLabel
            value="Total: #{modeloPopupRegistroDespesa.valorTotal}">
            <f:convertNumber type="currency" currencyCode="BRL"
                currencySymbol="R$" maxFractionDigits="2" minFractionDigits="2" />
        </h:outputLabel>
    </h:panelGroup>

可能这是因为它不知道它在我想要渲染的组件内部,所以如何刷新这个组件(在这种情况下是dataTable的父组件)？

您可以将组件绑定到视图,并在渲染中引用其 UIComponent#getClientId()：

<h:panelGroup id="painelTabelaAPDespesa" binding="#{painel}">
    <p:dataTable id="tabelaAPDespesa" value="#{itensAPDespesa.itens}" var="item">
        ...
        <f:ajax render=":#{painel.clientId}" ... />
        ...
    </p:dataTable>
</h:panelGroup>

JSF f：ajax无法在上下文中找到组件

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