Rails: Many to many polymorphic relationships

Question

See comments for updates.

I\'ve been struggling to get a clear and straight-forward answer on this one, I\'m hoping this time I\'ll get it! :D I definitely have

Answer 1

Using STI:

class Task < ActiveRecord::Base
end

class StoreTask < Task
  belongs_to :store, :foreign_key => "target_id"
end

class VehicleTask < Task
  belongs_to :vehicle, :foreign_key => "target_id"
end

class Store < ActiveRecord::Base
  has_many :tasks, :class_name => "StoreTask", :foreign_key => "target_id"
end

class Vehicle < ActiveRecord::Base
  has_many :tasks, :class_name => "VehicleTask", :foreign_key => "target_id"
end

In your databse you'll need: Task type:string and Task target_id:integer

The advantage is that now you have a through model for each task type which can be specific.

See also STI and polymorphic model together

Cheers!