Question

I can localize an error message for each validation, but how can I create an error for particular model.

Ordinary locale looks like this:

en:
  mongoid:
    errors:
      messages:
        taken: "It is already taken"

But I want to change message for user model:

en:
  mongoid:
    errors:
      messages:
        taken: "It is already taken"
        user:
          taken: "It is already taken. %{link_to 'Remember password', reset_password_path'}"

Answer 1

Try this:

en:
  mongoid:
    errors:
      messages:
        taken: "It is already taken"
      models:
        user:
          attributes:
            login:
              taken: "It is already taken. %{link}"

Reference:

ActiveRecord code comments

PS:
The localization string should use interpolation variable for dynamic substitution.

E.g:
Add an error on the login field of user object:

user.errors.add(:login, :taken, :link => "foo")