Fully custom validation error message with Rails

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Now, the accepted way to set the humanized names and custom error messages is to use locales.

# config/locales/en.yml
en:
  activerecord:
    attributes:
      user:
        email: "E-mail address"
    errors:
      models:
        user:
          attributes:
            email:
              blank: "is required"

Now the humanized name and the presence validation message for the “email” attribute have been changed.

Validation messages can be set for a specific model+attribute, model, attribute, or globally.

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