How to inherit from Devise Controllers - ruby-on-rails

Question

I have a user model which uses Devise for authentication and also have an administrator model, which also uses Devise.
I want administrators to be able to edit users profile via administrators/users/{user.id}/edit, however I want this process to be done through Devise Controllers, therefore I tried to inherit from the Users::RegistrationsController as shown below:
class Administrators::UsersController < Users::RegistrationsController
before_action :set_user, only: [:show,:edit,:update,:destroy]
def index
#users=User.all
end
def show
end
def new
super
end
def update
#user.update(user_params)
redirect_to [:administrators,:users]
end
but I get the following error:
Could not find devise mapping for path "/administrators/users". This may happen for two reasons: 1) You forgot to wrap your route inside the scope block. For example: devise_scope :user do get "/some/route" => "some_devise_controller" end 2) You are testing a Devise controller bypassing the router. If so, you can explicitly tell Devise which mapping to use: #request.env["devise.mapping"] = Devise.mappings[:user]
I tried to change the routes but I still get the same error.
Could you please help me?

Answer 1

Inheriting from Devise::RegistrationsController may initially seem like a good idea from a code reuse standpoint but it really not a very good idea.
The intent of the controllers is very different - Devise::RegistrationsController partially deals with an un-authenicated user - and the Devise controllers are scary beasts due to the amount of flexibility built in Devise.
Instead you should just setup a plain old CRUD controller as the task at hand is not very complex compared to clobbering over half of Devise::RegistrationsController.
# config/routes.rb
namespace :administrators do
resources :users
end
# app/controllers/administrators/base_controller.rb
module Administrators
class AuthorizationError < StandardError; end
class BaseController
respond_to :html
before_action :authenticate_user!
# Replace with the lib of your choice such as Pundit or CanCanCan
before_action :authorize_user!
rescue_from AuthorizationError, with: :unauthorized
private
def authorize_user!
raise AuthorizationError and return unless current_user.admin?
end
def unauthorized
redirect_to new_session_path, alert: 'You are not authorized.'
end
end
end
class Administrators::UsersController < Administrators::BaseController
before_action :set_user, only: [:show, :edit, :update, :destroy]
def show
end
def index
#users = User.all
end
def new
#user = User.new
end
def create
#user = User.create(user_params)
respond_with(:administrators, #user)
end
def edit
end
def update
#user.update(user_params)
respond_with(:administrators, #user)
end
def destroy
#user.destroy
respond_with(:administrators, #user)
end
private
def user_params
params.require(:user).permit(:email, :password, :password_confirmation)
end
end
Instead you may want to focus on reusing the views through partials for example.
See:
ActionController::Responder
Pundit
CanCanCan