如何更改默认的“验证错误:值无效".信息? [英] How to change the default "Validation Error: Value is not valid" message?

问题描述

下面是我可以在Stack Overflow上找到的4条相关文章:

Below are 4 related posts I could find on Stack Overflow:

• 验证错误:值无效
• 验证错误值无效
• Jsf:验证错误值对于SelectOneMenu无效
• 带有枚举的JSF'验证错误:值无效'

• Validation Error: Value is not valid
• Validation error value is not valid
• Jsf : Validation error value is not valid for SelectOneMenu
• JSF with Enum 'Validation Error: Value is not valid'

在这些帖子中，发布者不知道为什么会收到此错误消息.就我而言，我确实知道为什么会出现此错误，并且我想更改默认的验证错误:值无效" 消息，让我们说这是我的消息" .我怎么能做到这一点?

In these posts, the posters didn't know why they had this error message. In my case, I do know why I have this error, and I would like to change the default "Validation Error: Value is not valid" message to let's say "This is my message". How could I achieve this?

PS1:我已经尝试过requiredMessage，validatorMessage和converterMessage属性，但是在这种特殊情况下都不会调用它们.

PS1: I already tried the requiredMessage, validatorMessage and converterMessage attributes, but none of them get called in this special case.

PS2:我正在使用RichFaces 4.1.0，所以我正在使用的下拉列表是rich:select一个.

PS2: I'm using RichFaces 4.1.0, so the drop-down list I'm using is the rich:select one.

场景:

1. 我有两个实体，例如雇主和雇员.
2. 我创建员工employee1.
3. 我要创建雇主employer1，并通过下拉列表将其链接到employee1.
4. 在提交雇主创建表格之前，我从数据库中删除了employee1.
5. 然后，我提交雇主创建表格:由于employee1不再可用，该消息出现在下拉列表旁边.

1. I have two entities, for example employers and employees.
2. I create the employee employee1.
3. I want to create the employer employer1, and link it to the employee1 via a drop-down list.
4. Before submitting the employer creation form, I delete the employee1 from the database.
5. Then, I submit the employer creation form: the said message appears next to the drop-down list, since the employee1 isn't available anymore.

这种行为是我所期望的，但是我只是想将默认消息更改为另一种，对用户更友好.

This behavior is the one I expected, but I just would like to change the default message to another one, more user-friendly.

推荐答案

提供一个自定义转换器，并将其作为getAsObject()中的转换器异常抛出.

Supply a custom converter and throw it as converter exception in getAsObject().

基本上

@Override
public Object getAsObject(FacesContext context, UIComponent component, String submittedValue) {
    if (submittedValue == null || submittedValue.isEmpty()) {
        return null;
    }

    Employee employee = findEmployeeInDatabase(submittedValue);

    if (employee == null) {
        throw new ConverterException("Sorry, unknown employee.");
    }
    else {
        return employee;
    }
}

请注意，这也使您可以使用converterMessage.

Note that this also enables you to use converterMessage.

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