仅在选中此复选框时才需要h：inputText [英] Make a h:inputText required only when the checkbox is selected

问题描述

我有一个数据表，其中的行包含一些必需的输入文本字段。每行还具有一个称为删除的复选框。我只想在选中复选框后才具有 required = true 。我该如何实现呢？

I have a datatable with rows containing some input text fields that are required. Each row also has a check box called delete. I want to have the required = "true" only when the check box is selected. How can I achieve this?

推荐答案

只需让输入的必需属性选中复选框的值。

Just let the input's required attribute check the checkbox's value.

这里有一个启动示例：

<h:form>
    <h:dataTable value="#{bean.list}" var="item">
        <h:column><h:selectBooleanCheckbox binding="#{checkbox}" /></h:column>
        <h:column><h:inputText id="input" value="#{item.value}" required="#{checkbox.value == 'true'}" /></h:column>
        <h:column><h:message for="input" /></h:column>
    </h:dataTable>
    <h:commandButton value="submit" action="#{bean.submit}" />
</h:form>

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