CODEWITHSUNDEEP
ruby-on-railsruby-on-rails-3ruby-on-rails-4polymorphic-associations
Chitrank Samaiya
Chitrank Samaiya

Reputation: 841

How to manage multiple roles using polymorphic association in rails?

I am using devise for authentication and finding a way to get out of this.

Can I explore same design user having multiple roles ?. So that he can login as Teacher or Parent both?. Basically he can switch accounts like multiple roles.

class User < ActiveRecord
  belongs_to :loginable, polymorphic: true
end

class Parent < ActiveRecord
  has_one :user, as: :loginable
end

class Teacher < ActiveRecord
  has_one :user, as: :loginable
end


for eg: loginable_type: "Parent", loginable_id: 123

I want to find a way to change above fields, if user is logging in as 'Teacher' and its ID.

Upvotes: 4

Views: 810

Answers (1)

max
max

Reputation: 102443

You can add a polymorphic has_many relationship:

class CreateUserRoles < ActiveRecord::Migration
  def change
    create_table :user_roles do |t|
      t.integer :role_id
      t.integer :user_id
      t.string  :role_type # stores the class of role
      t.timestamps
    end
    add_index :user_roles, [:role_id, :role_type]
  end
end

class AddActiveRoleToUser < ActiveRecord::Migration
  def change
    change_table :user_roles do |t|
      t.integer :active_role_id
      t.timestamps
    end
  end
end

class User < ActiveRecord
   has_many :roles, polymorphic: true
   has_one :active_role, polymorphic: true


   def has_role? role_name
     self.roles.where(role_type: role_name).any?
   end
end

Upvotes: 2

Related Questions