deviseのコントローラーの初期状態が気になったことがあり、一度サンプルを作る羽目になったのでメモとしてQIITAに残しとく。

confirmations_controller.rb

class Sample::ConfirmationsController < Devise::ConfirmationsController
  # GET /resource/confirmation/new
  # def new
  #   super
  # end

  # POST /resource/confirmation
  # def create
  #   super
  # end

  # GET /resource/confirmation?confirmation_token=abcdef
  # def show
  #   super
  # end

  # protected

  # The path used after resending confirmation instructions.
  # def after_resending_confirmation_instructions_path_for(resource_name)
  #   super(resource_name)
  # end

  # The path used after confirmation.
  # def after_confirmation_path_for(resource_name, resource)
  #   super(resource_name, resource)
  # end
end

omniauth_callbacks_controller.rb

class Sample::OmniauthCallbacksController < Devise::OmniauthCallbacksController
  # You should configure your model like this:
  # devise :omniauthable, omniauth_providers: [:twitter]

  # You should also create an action method in this controller like this:
  # def twitter
  # end

  # More info at:
  # https://github.com/heartcombo/devise#omniauth

  # GET|POST /resource/auth/twitter
  # def passthru
  #   super
  # end

  # GET|POST /users/auth/twitter/callback
  # def failure
  #   super
  # end

  # protected

  # The path used when OmniAuth fails
  # def after_omniauth_failure_path_for(scope)
  #   super(scope)
  # end
end

passwords_controller.rb

class Sample::PasswordsController < Devise::PasswordsController
  # GET /resource/password/new
  # def new
  #   super
  # end

  # POST /resource/password
  # def create
  #   super
  # end

  # GET /resource/password/edit?reset_password_token=abcdef
  # def edit
  #   super
  # end

  # PUT /resource/password
  # def update
  #   super
  # end

  # protected

  # def after_resetting_password_path_for(resource)
  #   super(resource)
  # end

  # The path used after sending reset password instructions
  # def after_sending_reset_password_instructions_path_for(resource_name)
  #   super(resource_name)
  # end
end

registrations_controller.rb

class Sample::RegistrationsController < Devise::RegistrationsController
  # before_action :configure_sign_up_params, only: [:create]
  # before_action :configure_account_update_params, only: [:update]

  # GET /resource/sign_up
  # def new
  #   super
  # end

  # POST /resource
  # def create
  #   super
  # end

  # GET /resource/edit
  # def edit
  #   super
  # end

  # PUT /resource
  # def update
  #   super
  # end

  # DELETE /resource
  # def destroy
  #   super
  # end

  # GET /resource/cancel
  # Forces the session data which is usually expired after sign
  # in to be expired now. This is useful if the user wants to
  # cancel oauth signing in/up in the middle of the process,
  # removing all OAuth session data.
  # def cancel
  #   super
  # end

  # protected

  # If you have extra params to permit, append them to the sanitizer.
  # def configure_sign_up_params
  #   devise_parameter_sanitizer.permit(:sign_up, keys: [:attribute])
  # end

  # If you have extra params to permit, append them to the sanitizer.
  # def configure_account_update_params
  #   devise_parameter_sanitizer.permit(:account_update, keys: [:attribute])
  # end

  # The path used after sign up.
  # def after_sign_up_path_for(resource)
  #   super(resource)
  # end

  # The path used after sign up for inactive accounts.
  # def after_inactive_sign_up_path_for(resource)
  #   super(resource)
  # end
end

sessions_controller.rb

class Sample::SessionsController < Devise::SessionsController
  # before_action :configure_sign_in_params, only: [:create]

  # GET /resource/sign_in
  # def new
  #   super
  # end

  # POST /resource/sign_in
  # def create
  #   super
  # end

  # DELETE /resource/sign_out
  # def destroy
  #   super
  # end

  # protected

  # If you have extra params to permit, append them to the sanitizer.
  # def configure_sign_in_params
  #   devise_parameter_sanitizer.permit(:sign_in, keys: [:attribute])
  # end
end

unlocks_controller.rb

class Sample::UnlocksController < Devise::UnlocksController
  # GET /resource/unlock/new
  # def new
  #   super
  # end

  # POST /resource/unlock
  # def create
  #   super
  # end

  # GET /resource/unlock?unlock_token=abcdef
  # def show
  #   super
  # end

  # protected

  # The path used after sending unlock password instructions
  # def after_sending_unlock_instructions_path_for(resource)
  #   super(resource)
  # end

  # The path used after unlocking the resource
  # def after_unlock_path_for(resource)
  #   super(resource)
  # end
end