uninitialized constant Devise::Api::Responses::ErrorResponseDecorator (NameError)

[DerekCrosson]

I'm using the instructions in the Readme to override the default response but when I prepend the decorator to the response class I get the following error when I start the rails server:

❯ rails s
=> Booting Puma
=> Rails 7.0.6 application starting in development
=> Run `bin/rails server --help` for more startup options
Exiting
/Users/derek/CodeRepos/project/config/initializers/devise.rb:358:in `<main>': uninitialized constant Devise::Api::Responses::ErrorResponseDecorator (NameError)

Devise::Api::Responses::ErrorResponse.prepend Devise::Api::Responses::ErrorResponseDecorator

This is my lib/devise/api/responses/error_response_decorator.rb:

module Devise::Api::Responses::ErrorResponseDecorator
  def body
    if error_description
      {
        errors: [
          {
            status: "401",
            title: error,
            detail: error_description.join(" "),
            source: { pointer: "/data/attributes/token" }
          }
        ]
      }
    end
  end
end

This is the line causing an issue, in the Devise initialiser added after the config block is closed:

Devise::Api::Responses::ErrorResponse.prepend Devise::Api::Responses::ErrorResponseDecorator

[DerekCrosson]

Fixed by requiring the decorator in the devise initializer: require 'devise/api/responses/error_response_decorator'