信息:警告:FacesMessage已入队，但可能未显示 [英] INFO: WARNING: FacesMessage(s) have been enqueued, but may not have been displayed

问题描述

我创建了一个带有用于从用户那里获取信息的表格的用户界面.当我提交表单时，它将在服务器日志中显示以下警告:

I created an user interface with a form to get information from user. When I submit the form, it prints the following warning in the server log:

INFO: WARNING: FacesMessage(s) have been enqueued, but may not have been displayed.
sourceId=j_idt7:j_idt11[severity=(ERROR 2), summary=(j_idt7:j_idt11: Validation Error: Value is not valid), detail=(j_idt7:j_idt11: Validation Error: Value is not valid)]

我试图解决它，但是我不知道如何解决.这个问题是怎么引起的，我该如何解决?

I tried to solve it, however I didn't understand how. How is this problem caused and how can I solve it?

推荐答案

对于涉及未显示的Validation Error: Value is not valid消息的警告，这意味着您在某个<h:selectXxx>组件(例如<h:selectOneMenu>)中没有相关的<h:message>，因此JSF无法直接在UI中显示有关转换/验证错误的人脸消息.

As to the warning referring an undisplayed Validation Error: Value is not valid message, this means that you've somewhere a <h:selectXxx> component such as <h:selectOneMenu> without an associated <h:message> and therefore JSF is not able to display faces messages about conversion/validation errors directly in the UI.

为了解决特定的警告，只需添加<h:message>:

In order to fix the particular warning, just add a <h:message>:

<h:selectOneMenu id="foo" ... />
<h:message for="foo" />

请注意，当您使用<f:ajax>进行Ajax提交表单时，您不应忘记将消息包含在ajax更新中.首先，使用render="@form"更新整个表单.

Note that when you're ajax-submitting the form using <f:ajax>, then you should not forgot to include the messages in the ajax-update. To start with, use render="@form" to update the entire form.

对于消息中提到的具体验证错误问题，请转到以下答案:

As to the concrete validation error problem which is mentioned in the message, head to the following answer: Validation Error: Value is not valid.

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