Module: DeviseTokenAuth::Controllers::Helpers

Extended by:
ActiveSupport::Concern
Included in:
DeviseTokenAuth::Concerns::ResourceFinder
Defined in:
lib/devise_token_auth/controllers/helpers.rb

Defined Under Namespace

Modules: ClassMethods

Class Method Summary collapse

Class Method Details

.define_helpers(mapping) ⇒ Object

Define authentication filters and accessor helpers based on mappings. These filters should be used inside the controllers as before_actions, so you can control the scope of the user who should be signed in to access that specific controller/action. Example:

Roles:
  User
  Admin

Generated methods:
  authenticate_user!                   # Signs user in or 401
  authenticate_admin!                  # Signs admin in or 401
  user_signed_in?                      # Checks whether there is a user signed in or not
  admin_signed_in?                     # Checks whether there is an admin signed in or not
  current_user                         # Current signed in user
  current_admin                        # Current signed in admin
  user_session                         # Session data available only to the user scope
  admin_session                        # Session data available only to the admin scope
  render_authenticate_error            # Render error unless user or admin is signed in

Use:
  before_action :authenticate_user!  # Tell devise to use :user map
  before_action :authenticate_admin! # Tell devise to use :admin map



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# File 'lib/devise_token_auth/controllers/helpers.rb', line 119

def self.define_helpers(mapping) #:nodoc:
  mapping = mapping.name

  class_eval <<-METHODS, __FILE__, __LINE__ + 1
    def authenticate_#{mapping}!(opts={})
      unless current_#{mapping}
        render_authenticate_error
      end
    end

    def #{mapping}_signed_in?
      !!current_#{mapping}
    end

    def current_#{mapping}
      @current_#{mapping} ||= set_user_by_token(:#{mapping})
    end

    def #{mapping}_session
      current_#{mapping} && warden.session(:#{mapping})
    end

    def render_authenticate_error
      return render json: {
        errors: [I18n.t('devise.failure.unauthenticated')]
      }, status: 401
    end
  METHODS

  ActiveSupport.on_load(:action_controller) do
    if respond_to?(:helper_method)
      helper_method(
        "current_#{mapping}",
        "#{mapping}_signed_in?",
        "#{mapping}_session",
        'render_authenticate_error'
      )
    end
  end
end