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i18n_error_messages

🌐 Customizing Error Messages with I18n​

Leverage Rails’ I18n backend to override default validation messages and interpolate model attributes. This ensures consistency and supports localization.

# config/locales/models/user.en.yml
en:
  activerecord:
    errors:
      models:
        user:
          attributes:
            password:
              too_short: "must have at least %{count} characters"

# app/models/user.rb
class User < ApplicationRecord
  validates :password, length: { minimum: 8, too_short: :too_short }
end