Migrate country id-s to country codes

app/models/address.rb

@@ -8,7 +8,7 @@ class Address < ActiveRecord::Base
   ]
 
   belongs_to :contact
-  belongs_to :country
+  belongs_to :country_deprecated, foreign_key: "country_id"
 
   has_paper_trail class_name: 'AddressVersion'
 

app/models/country_deprecated.rb

@@ -1,4 +1,6 @@
-class Country < ActiveRecord::Base
+class CountryDeprecated < ActiveRecord::Base
+  self.table_name = "countries"
+
   def to_s
     name
   end

app/models/registrar.rb

@@ -1,5 +1,5 @@
 class Registrar < ActiveRecord::Base
-  belongs_to :country
+  belongs_to :country_deprecated, foreign_key: "country_id"
   has_many :domains, dependent: :restrict_with_error
   has_many :contacts, dependent: :restrict_with_error
   has_many :api_users, dependent: :restrict_with_error

app/models/user.rb

@@ -6,7 +6,7 @@ class User < ActiveRecord::Base
   # After activisation, system should require to change temp password.
   # TODO: Estonian id validation
 
-  belongs_to :country
+  belongs_to :country_deprecated, foreign_key: "country_id"
 
   validates :username, :password, presence: true
   validates :identity_code, uniqueness: true, allow_blank: true