core/db/migrate/20150924102640_add_stock_location_id_to_comable_stocks.rb
class AddStockLocationIdToComableStocks < ActiveRecord::Migration
def change
change_table :comable_stocks do |t|
t.references :stock_location
end
add_index :comable_stocks, :stock_location_id
add_index :comable_stocks, [:stock_location_id, :variant_id]
end
end