< f:facet>不适用于< h:form> [英] <f:facet> not working with <h:form>

问题描述

我有一个模板，其中定义了<h:form>. <h:form>在整个应用程序中用于实体的CRUD页面.

I have a template, in which a <h:form> is defined. This <h:form> is used all over the application for the CRUD pages of entities.

因此，在一个地方，我需要另一个enctype来填写表格，以便我可以上传文件.我以为可以用模板中的一个方面解决此问题:

So, at one place I need another enctype for the form, so that I can upload files. I thought I can solve this with a facet in the template:

<h:form id="main-form">
    <f:facet name="enctype">
        <ui:insert name="form-enctype"/>
    </f:facet>

    <ui:insert name="buttons"/><p/>
    <ui:insert name="content"/><p/>
    <ui:insert name="buttons"/>
    <ui:insert name="additionalHelper"/>

</h:form>

在具体页面上，我想通过以下方式设置自定义enctype:

And at the concrete page I wanted to set the custom enctype this way:

<ui:define name="form-enctype">
    <h:outputText value="multipart/form-data"/>
</ui:define>

但是在源代码中，我总是以默认的application/x-www-form-urlencoded作为enctype的<h:form>

But in the source code I always end up with the default application/x-www-form-urlencodedas enctype for the <h:form>

为什么会这样?在源代码中的其他位置，这表现正常.

Why is this happening? At other locations in the source code this is behaving properly.

推荐答案

The reference pages for h:form does not mention enctype facet. I don't think it is valid facet for h:form. However, there is attribute enctype.

如果要在特定页面中定义表单的内容类型，请使用如下所示的模板参数.

If you want to define content type of the form in specific pages then use template parameters like shown below.

模板将如下所示:

<h:form id="main-form" enctype="#{myenctype}">

    <ui:insert name="buttons"/><p/>
    <ui:insert name="content"/><p/>
    <ui:insert name="buttons"/>
    <ui:insert name="additionalHelper"/>

</h:form>

，并且特定页面必须定义<ui:param name="myenctype" value="multipart/form-data"/>:

and specific page has to define <ui:param name="myenctype" value="multipart/form-data"/>:

<ui:composition template="template.xhtml">
    <ui:param name="myenctype" value="multipart/form-data"/>
    <!-- other stuff like <ui:define ...> -->
</ui:composition>

如果您想为参数提供默认值，请使用此问题.

If you want to provide default value for the parameter use ternary operator like described in this question.

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