endlos/poly-api

Quick polymorphic associations sample

Polymorphic associations sample¶ ↑

1. New app

   rails-api new poly-api --skip-sprockets

2. Generate the models

   rails g model client name company
   rails g model organization name
   rails g model person name position organization:references
   rails g model contract details:text name client:references person:references
   rails g model address street street_number zip_code state address_for addressable:references{polymorphic}
   
   bundle exec rake db:migrate

3. Add the relationships

   class Organization < ActiveRecord::Base
     has_many :people
     has_many :addresses, as: :addressable
   end
   
   class Person < ActiveRecord::Base
     belongs_to :organization
     has_many :contracts
     has_many :clients, through: :contracts
     has_many :addresses, as: :addressable
   end
   
   class Address < ActiveRecord::Base
     belongs_to :addressable, polymorphic: true
   end
   

4. Have fun in the console

   p = Person.create(name: "Hugo", position: "CEO")
   p.addresses.create(street: "Happy Street", street_number: "123", address_for: "Home")
   p.addresses
   o = Organization.create(name: "ABC")
   o.addresses.create(street: "Corp Av", street_number: "123", address_for: "Office")
   o.addresses
   

License¶ ↑

Released under the MIT License.