role based route authentication - devise

Question

I have been using devise and cancancan for authentication and authorisation resp., resque for background jobs. I have been following Ryans screencast number 271 and saw below code snippet for routes.rb file.
authenticate :admin do
mount Resque::Server, :at => "/resque"
end
to authenticated user, but in my case I have only users table and admin is also users separated by role column, Now I would like to authenticate and authorise the route for resque server path based on users role, How can I achieve solution for this problem ?
authenticate :user do
mount Resque::Server, :at => "/resque"
end
works fine for logged in user but i want it to be accessible only to admin user. Any help will be heartly appreciated.

Answer 1

# config/initializers/admin.rb
class CanAccessResque
def self.matches?(request)
current_user = request.env['warden'].user
return false if current_user.blank?
Ability.new(current_user).can? :manage, Resque
end
end
# routes.rb
namespace :admin do
constraints CanAccessResque do
mount Resque::Server, at: 'resque'
end
end
# ability.rb
class Ability
include CanCan::Ability
def initialize(user)
user ||= User.new
if user.is_admin?
can :manage, Resque
end
end
end
# user.rb
class User < ActiveRecord::Base
def is_admin?
# your admin logic here for example:
self.role == "admin"
end
end
OR for more information, check this blog out: resque-admin-in-rails-routes-with-cancan
Hope this helps you.