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How To: Add an Admin Role
Baltazore edited this page May 18, 2012
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37 revisions
First generate the model and migration for the Admin role:
$ rails generate devise Admin
Configure your Admin model
class Admin < ActiveRecord::Base
devise :database_authenticatable, :trackable, :timeoutable, :lockable
attr_accessible :email, :password, :password_confirmation
end
Adjust the generated migration:
class DeviseCreateAdmins < ActiveRecord::Migration
def self.up
create_table(:admins) do |t|
t.database_authenticatable :null => false
t.trackable
t.lockable
t.timestamps
end
end
def self.down
drop_table :admins
end
end
Routes should be automatically updated to contain the following
devise_for :admins
devise_for :users
Enjoy!
The easiest way of supporting an admin role is to simply add an attribute that can be used to identify administrators.
$ rails generate migration add_admin_to_users admin:boolean
Add this to the migration:
class AddAdminToUsers < ActiveRecord::Migration
def self.up
add_column :users, :admin, :boolean, :default => false
end
def self.down
remove_column :users, :admin
end
end
Next, execute the migration script:
$ rake db:migrate
Now you're able to do identify administrators:
if current_user.admin?
# do something
end
If the page could potentially not have a current_user
set then:
if current_user.try(:admin?)
# do something
end
With the above way if current_user
were nil
, then it would still work without raising an undefined method `admin?' for nil:NilClass
exception.
The code below can be used to grant admin status to the current user.
current_user.update_attribute :admin, true