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Many-to-Many Polymorphic Relationships In Rails
Posted by Weston Ganger
Imagine the following example where:
- A person has many animals (cats and dogs)
- A cat has many people(in the family)
- A dog has many people(in the family)
- All of this is through the Home
Heres how to accomplish that scenario:
class Home < ActiveRecord::Base belongs_to :person belongs_to :animal, polymorphic: true end class Person < ActiveRecord::Base has_many :animals, through: :home end class Dog < ActiveRecord::Base has_many :people, through: :home, as: :animal end class Cat < ActiveRecord::Base has_many :people, through: :home, as: :animal end
Not too complicated but it does require a through model.
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