Rails4 / has_many through / accepts_nested_attributes_for / allow_destroy / nested form

Models:

class Car < ActiveRecord::Base

  has_many :garages
  has_many :houses, through: :garages

  accepts_nested_attributes_for :garages, allow_destroy: true

end

class Garage < ActiveRecord::Base

  belongs_to :car
  belongs_to :house

  accepts_nested_attributes_for :house

end

class House < ActiveRecord::Base

  has_many :garages
  has_many :cars, through: :garages

end

Nested form here:

• http://localhost:3000/cars/1/edit
• https://github.com/EricLondon/Rails4-has_many_through-accepts_nested_attributes_for-allow_destroy/blob/master/rails4/app/views/cars/_form.html.erb