@NotNull Bean验证被viewParam忽略 [英] @NotNull Bean Validation ignored for viewParam

问题描述

问题

我正在尝试验证强制性的GET请求参数.

I'm trying to validate a mandatory GET request parameter.

在视图中，我添加了一个对应的viewParam标签.

In the view I've added a corresponding viewParam tag.

<f:metadata>
    <f:viewParam name="customerId" value="#{customerDetailBean.customerId}"/>
</f:metadata>

我的CDI bean看起来像这样

And my CDI bean looks like this

@Model
public class CustomerDetailBean {

    @NotNull
    private Integer customerId;

    public Integer getCustomerId() {
        return customerId;
    }

    public void setCustomerId(Integer customerId) {
        this.customerId = customerId;
    }
}

当我使用以下请求时，验证工作正常，并显示预期的验证消息.

When I use the following request, validation works fine and the expected validation message is displayed.

http://localhost:8080/getsupport/customerdetail.jsf?customerId=

但是，当我通过删除参数customerId更改请求时，将跳过验证并且不显示任何消息.

However, when I change the request by removing the parameter customerId, validation is skipped and no message is shown.

http://localhost:8080/getsupport/customerdetail.jsf

有没有办法使它按预期工作?

Is there a way to make it work as expected?

解决方法

我已将viewParam声明更改为

I've changed my viewParam declaration to

<f:metadata>
    <f:viewParam name="customerId" value="#{customerDetailBean.customerId}" required="true" />
</f:metadata>

该更新的版本可以与第二个请求一起正常工作.无论如何，我还是希望使用bean验证.

That updated version works fine with the second request. Anyway I would prefer to use bean validation.

我的设置

• Mojarra JSF 2.2.7
• 焊接2.2.1.决赛
• 休眠验证器5.1.1.最终版
• Tomcat 7.0.54

web.xml

<context-param>
    <param-name>javax.faces.INTERPRET_EMPTY_STRING_SUBMITTED_VALUES_AS_NULL</param-name>
    <param-value>true</param-value>
</context-param>

推荐答案

不幸的是，这是按设计方式工作".未提交任何内容时，将跳过所有验证.仅<f:viewParam required>有特殊处理.当什么都没有提交时，也会考虑它.另请参见UIViewParameter#processValidators()

This is, unfortunately, "working as designed". All validation is skipped when nothing's been submitted. Only the <f:viewParam required> has special treatment. It's also considered when nothing's been submitted. See also UIViewParameter#processValidators() javadoc and source code.

在 Mojarra问题跟踪器中，我只能找到问题3339 .

In the Mojarra issue tracker I can only find issue 3058 as a related issue, whereby the <f:validateRequired> isn't being considered. This is technically actually exactly the same problem as you're facing with @NotNull. I've created issue 3339 on this.

与此同时，您最好的选择是退回required="true".自定义组件也可以，但是据我所知这并不是一件容易的事.

In the meanwhile, your best bet is falling back to required="true". A custom component can also, but as far as I see this isn't going to be trivial.

更新:毕竟，此修复相对容易，并且 OmniFaces

Update: after all, the fix is relatively easy and has been implemented in OmniFaces <o:viewParam> in the current 2.0 snapshot release.

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