Question

How can ActiveRecord full error messages be translated?
For example, I want to show them in spanish.

I create this file config/locales/es.yml:

es:
  errors:
    attributes:
      email:
        blank: "El email no puede estar en blanco"

But when submitting a form with a presence: true, validation is including the attribute always at the beginning of the message:

Email El email no puede estar en blanco

The first “Email” word is not necessary. How can I get rid of it?

Answer 1

Ok, after much reading and re-reading the official i18n guide, I discovered in the section 5.2.2 this:

ActiveModel::Errors#full_messages prepends the attribute name to the
error message using a separator that will be looked up from
errors.format (and which defaults to “%{attribute} %{message}”).

So, the solution is to configure the format, like this:

es:
  errors:
    format: "%{message}"
    attributes:
      email:
        blank: "El email no puede estar en blanco"