jsf - 检查哪个表单有错误

Question

我有一个模态窗口，我只想在页面上的几个表单之一出现错误时启动它。有没有办法使用 el 来识别特定表单是否有错误？

示例伪代码：

<h:form id="form1">

</h:form>

<h:form id="form2">

</h:form>

<a4j:rendered="#{form1.hasErrors()}">
    ... modal here ... 
</a4j:rendered>

Answer 1

如果您execute="@form"在 ajax 请求中有一个，那么您可以UIForm#isSubmitted()与FacesContext#isValidationFailed().

<h:form binding="#{form1}">

</h:form>

<h:form binding="#{form2}">

</h:form>

<a4j:xxx rendered="#{form1.submitted and facesContext.validationFailed}">
    Validation of form1 has failed.
</a4j:xxx>

<a4j:xxx rendered="#{form2.submitted and facesContext.validationFailed}">
    Validation of form2 has failed.
</a4j:xxx>