add order and reservation table

db/migrate/20180406080436_create_deliveries.rb

@@ -1,6 +1,18 @@
 class CreateDeliveries < ActiveRecord::Migration[5.1]
   def change
     create_table :deliveries do |t|
+    	t.string :order_reservation_id, foreign_key: true, :null => false, :limit => 16
+    	t.string :provider, :null => false
+    	t.string :delivery_type, :null => false
+    	t.string :township
+    	t.string :address
+    	t.string :direction_address
+    	t.string :delivery_fee
+    	t.string :remark
     end
   end
+
+  def down
+  	drop_table :deliveries
+  end
 end