如何自定义 rails activerecord 验证错误消息以显示属性值 [英] how to customize rails activerecord validation error message to show attribute value

问题描述

当用户尝试使用已存在的名称创建记录时，我想显示如下错误消息:

When a user tries to create a record with a name that already exists, I want to show an error message like:

name "some name" 已经被占用

我一直在努力:

validates_uniqueness_of :name, :message => "#{name} has already been taken"

但这会输出表名而不是 name 属性的值

but this outputs the table name instead of the value of the name attribute

推荐答案

2 件事:

1. 验证消息使用 Rails I18n 样式插值，即 %{value}
2. 关键是 value 而不是 name，因为在国际化的上下文中，您并不真正关心模型的其余部分.

1. The validation messages use the Rails I18n style interpolation, which is %{value}
2. The key is value rather than name, because in the context of internationalization, you don't really care about the rest of the model.

所以你的代码应该是:

validates_uniqueness_of :name, :message => '%{value} has already been taken'

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