order api - WIP & db structure change

db/migrate/20170403140820_create_order_items.rb

@@ -3,13 +3,12 @@ class CreateOrderItems < ActiveRecord::Migration[5.0]
     create_table :order_items do |t|
       t.references :order, foreign_key: true, :null => false
       t.string :order_item_status, :null => false, :default => "new"
+      t.string :item_order_by #person who order this
       t.string :item_code, :null => false
       t.string :item_name, :null => false
       t.decimal :qty, :precision => 10, :scale => 2, :null => false, :default => 0.00
-      t.string :item_order_by #person who order this
       t.string :remark
       t.string :options
-      t.string :variants
       t.json :set_menu_items #this parameter is require to route the items correctly
 
       t.timestamps