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Question

I have a model Persons::Names::Log and another model Persons::Address . I want to create an association between Log and Address . Is it possible? What statements should I write in both the model files?

Edit :

I want to have an association like Persons::Names::Log.last.address

Answer 1

From http://guides.rubyonrails.org/association_basics.html#controlling-association-scope :

To associate a model with a model in a different namespace, you must specify the complete class name in your association declaration.

The following is an example of the associations with the given class names:

module Persons
  module Names
    class Log
      has_one :address, class_name: "Persons::Address"
    end
  end

  class Address
    belongs_to :log, class_name: "Persons::Names::Log"
  end
end

Answer 2

Specify the class name with scopes :

    # app/persons/names/log.rb
    module Persons
      module Names
        class Log < ActiveRecord::Base
          has_one :address, class_name: "Persons::Address"
        end
      end
    end

   # app/persons/address.rb
    module Persons
      class Address < ActiveRecord::Base
        belongs_to :log, class_name: "Persons::Names::Log"
      end
    end