Move log migration

db/migrate/20150110113257_add_json_based_versions.rb

@@ -0,0 +1,28 @@
+class AddJsonBasedVersions < ActiveRecord::Migration
+  def change
+    %w(address contact_disclosure contact contact_status country dnskey
+    domain_contact domain domain_status domain_transfer api_user keyrelay
+    legal_document message nameserver registrar
+    reserved_domain setting user zonefile_setting
+    ).each do |name|
+      table_name = "log_#{name.tableize}"
+
+      create_table table_name do |t|
+        t.string   :item_type, null: false
+        t.integer  :item_id,   null: false
+        t.string   :event,     null: false
+        t.string   :whodunnit
+        t.json     :object
+        t.json     :object_changes
+        t.datetime :created_at
+      end
+      add_index table_name, [:item_type, :item_id]
+      add_index table_name, :whodunnit
+
+      add_column name.tableize, :creator_id_tmp, :integer
+      add_column name.tableize, :updater_id_tmp, :integer
+      rename_column name.tableize, :creator_id_tmp, :creator_id
+      rename_column name.tableize, :updater_id_tmp, :updater_id
+    end
+  end
+end