CODEWITHSUNDEEP
ruby-on-railsdevisecancancancancan
Koxzi
Koxzi

Reputation: 1051

Devise with CanCan(can)

I can't seem to find a good tutorial for this and I've hit a bit of a wall.

I'm using rails 4.2.0 with a basic CRUD app. For auth I'm using devise and for roles I'm using Cancancan as these have fairly understandable documentation.

I have two types of Users:

Users and Admins.

Admins can interact with all models. Add-Edit-Delete etc.

Users can only interact with certain models. Which will be a booking system of sorts.

I'm not quite sure of the process I need to go through to set this up. Do I need to do a full rails generation for each user type or can I just use the Devise generation? Adding onto that how can I choose the user type? So far I have two login links which works.

The main issue I'm having is defining roles in cancancan.

Any help/questions on the subject would be appreciated.

Upvotes: 1

Views: 1730

Answers (1)

Justin
Justin

Reputation: 4940

For simplicity, you could add an admin boolean column on the users table. You would check for an admin user with user.admin?.

Here is what the migration will look like.

> rails g migration add_admin_to_users

In your migration file, I would set a default value to false prior to running it.

class AddAdminToUsers < ActiveRecord::Migration
  def up
    add_column :users, :admin, :boolean, null: false, default: false
  end

  def down
    remove_column :users, :admin
  end
end

By default, your users won't be admins. However, you can easily make a user an admin with user.update_column(:admin, true).

With this, you should be able to follow the CanCanCan docs, as they are pretty extensive I believe.

class Ability
  include CanCan::Ability

  def initialize(user)
    user ||= User.new

    if user.admin?
      # admin abilities
    else
      # non-admin abilities
    end
  end
end

http://github.com/CanCanCommunity/cancancan/wiki/Defining-Abilities

Upvotes: 3

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