如何自定义rails activerecord验证错误消息以显示属性值

发布于 2024-11-08 12:39:05 字数 234 浏览 0 评论 0原文

当用户尝试使用已存在的名称创建记录时，我想显示一条错误消息，例如：

name“some name”已被占用

我一直在尝试这样做：

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

但这输出表名而不是 name 属性的值

原文

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" has already been taken

I have been trying to do:

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

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

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找个人就嫁了吧 2024-11-15 12:39:05

有两件事：

验证消息使用 Rails I18n 样式插值，即 % {value}
关键是 value 而不是 name，因为在国际化的背景下，您并不真正关心模型的其余部分。

所以你的代码应该是：

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

2 things:

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

So your code should be:

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

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-黛色若梦 2024-11-15 12:39:05

看起来您可以将 Proc 传递给消息。执行此操作时，您将获得两个参数：

类似于 :activerecord.errors.models.user.attributes.name.taken 的符号
类似于“{:model=>”的哈希值"User", :attribute=>"Name", :value=>"My Name"}

因此，如果您允许进程上有两个参数，则可以使用 attributes[:value]获取所使用的名称的项目：

validates_uniqueness_of :name, 
                        :message => Proc.new { |error, attributes| 
                          "#{attributes[:value]} has already been taken." 
                        }

It looks like you can pass a Proc to the message. When you do this, you get two parameters:

A symbol along the lines of :activerecord.errors.models.user.attributes.name.taken
A hash that looks something like `{:model=>"User", :attribute=>"Name", :value=>"My Name"}

So if you allow for two parameters on a proc, you can use the attributes[:value] item to get the name that was used:

validates_uniqueness_of :name, 
                        :message => Proc.new { |error, attributes| 
                          "#{attributes[:value]} has already been taken." 
                        }

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