Question

Currently I’m using Rolify & CanCan to manage roles and abilities in my Rails 3 app. My question is: How can I get a user to have a role by default on creation? for example, if I have a “user” role, ¿How can I make all the users that register in my app have a user Role by default? My Ability.rb has this code:

class Ability
  include CanCan::Ability

  def initialize(user)
    user ||= User.new # guest user (not logged in)
    if user.has_role? :admin
      can :manage, :all
    elsif user.has_role? :user
      can :update, User, :id => user.id
    end
  end
end

My User Model has this one:

class User < ActiveRecord::Base
  rolify
  authenticates_with_sorcery!
  attr_accessible :username, :email, :password, :password_confirmation

  validates_confirmation_of :password
  validates_presence_of :password, :on => :create
  validates_presence_of :username
  validates_uniqueness_of :username
  validates_presence_of :email
  validates_uniqueness_of :email
end

The Role Model This One:

class Role < ActiveRecord::Base
  has_and_belongs_to_many :users, :join_table => :users_roles
  belongs_to :resource, :polymorphic => true
end

And From the UsersController we have:

def new
  @user = User.new
end

def create
  @user = User.new(params[:user])

  if @user.save
    redirect_to users_path, :notice => "Tu usuario se ha guardado"
  else
    render "new"
  end
end

Finally the Rolify Migration is this one:

class RolifyCreateRoles < ActiveRecord::Migration
  def change
    create_table(:roles) do |t|
      t.string :name
      t.references :resource, :polymorphic => true

      t.timestamps
    end

    create_table(:users_roles, :id => false) do |t|
      t.references :user
      t.references :role
    end

    add_index(:roles, :name)
    add_index(:roles, [ :name, :resource_type, :resource_id ])
    add_index(:users_roles, [ :user_id, :role_id ])
  end
end

Now, I can assign roles manually from the rails console by using:

1 User.all
2 User.find(id)
3 User.add_role(:role)

But how can I assign automatically a default role when every user it’s created?

Thanks!

Answer 1

Forget it, Just had to add:

@user.add_role(:user)

in my create action right after the @user = User.new(params[:user]) line.

Figured it out by myself… I’m still learning 🙂

Thanks!