Rails custom validation error message not working

Question

My understanding is that I can customize error messages in the localization files. I'm currently trying to customize the error message for an invalid username field on my User model:

User.rb

class User < ActiveRecord::Base
    validates :username,    length: { within: 3..25 },
                            format: /\A(?=.*[a-z])[a-z\d]+\Z/i,
                            uniqueness: true

en.yml (localization file)

en:
  activerecord:
    errors:
      models:
        user:
          attributes:
            username:
              format: "CUSTOM MESSAGE!"

The error message I receive, however, is the default "is invalid" message (or "Username is invalid" if I get the full_messages version).

AbM · Accepted Answer · 2015-06-28 21:37:35Z

2

Have a look here. There is no format key in the errors/messages. You need to override the invalid key.

en:
  activerecord:
    errors:
      models:
        user:
          attributes:
            username:
              invalid: "CUSTOM MESSAGE!"

answered Jun 28, 2015 at 21:37

AbM

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