Customizing Devise error messages in Rails 3?

Question

I am using devise to handle authentication. Overall I like it, but I\'d like to customize the error display a bit. Right now I\'ve got the following in my view.

Answer 1

If you want to change the messages for the customs validations added by Device, check Christian's answer.

Otherwise, if the validation you want to customize is a standard validation like email format, you don't need to remove the Devise validations and replace them with your own. A better way of handling this is to make use of the default error messages precedence listed in the Rails guides and override the error message for a particular field and a particular validation.

For this particular question, the key that you need to add in config/locales/en.yml in order to change is invalid with a custom message for email errors is activerecord.errors.models.user.attributes.email.invalid (where user is the name of the model):

en:
  activerecord:
    errors:
      models:
        user:
          attributes:
            email:
              invalid: "custom invalid message"

Rails will search for a message to show for a validation in the following order:

activerecord.errors.models.[model_name].attributes.[attribute_name]
activerecord.errors.models.[model_name]
activerecord.errors.messages
errors.attributes.[attribute_name]
errors.messages