Add manager_id and manager_type to snapshot

db/migrate/1_create_shotengai_products_and_orders.rb

@@ -20,14 +20,10 @@ class CreateShotengaiProductsAndOrders < ActiveRecord::Migration[5.1]
       # Single Table Inheritance
       t.string :type
       t.json :meta
-      
-      t.integer :manager_id 
-      t.string :manager_type 
 
+      t.references :manager, polymorphic: true, index: true      
       t.timestamps
     end   
-
-    add_index :shotengai_products, [:manager_id, :manager_type]    
     add_index :shotengai_products, :type
   end
   
@@ -43,7 +39,6 @@ class CreateShotengaiProductsAndOrders < ActiveRecord::Migration[5.1]
       t.json :meta
 
       t.references :shotengai_product, foreign_key: true
-
       t.timestamps
     end
     
@@ -66,15 +61,12 @@ class CreateShotengaiProductsAndOrders < ActiveRecord::Migration[5.1]
       t.string :status
       t.string :type
       t.json :meta
-      
-      t.integer :buyer_id 
-      t.string :buyer_type 
-      
+
+      t.references :buyer, polymorphic: true, index: true
       t.timestamps
     end
 
     add_index :shotengai_orders, :type
-    add_index :shotengai_orders, [:buyer_id, :buyer_type]
   end
 
   def create_snapshot
@@ -96,6 +88,7 @@ class CreateShotengaiProductsAndOrders < ActiveRecord::Migration[5.1]
 
       t.references :shotengai_series, foreign_key: true
       t.references :shotengai_order, foreign_key: true
+      t.references :manager, polymorphic: true, index: true
 
       t.timestamps
     end

lib/shotengai/snapshot.rb

@@ -39,6 +39,9 @@ module Shotengai
     belongs_to :shotengai_cart, foreign_key: :shotengai_order_id, 
       class_name: 'Shotengai::Cart', optional: true#, touch: true
     
+    belongs_to :manager, polymorphic: true, optional: true
+    before_save :set_manager
+
     scope :in_order, -> { joins(:shotengai_order).where.not(shotengai_orders: { status: 'cart'}) }
     scope :in_cart, -> { joins(:shotengai_order).where(shotengai_orders: { status: 'cart'}) }    
     
@@ -60,8 +63,6 @@ module Shotengai
       end
     end
 
-    delegate :manager, to: :series
-
     # 支付前 信息 delegate to series
     %i{
         original_price price spec banners 
@@ -78,6 +79,10 @@ module Shotengai
       series.deleted?
     end
 
+    def manager
+      super || series.manager      
+    end
+
     # 订单支付后 存储当时信息快照
     def copy_info
       # cut_stock
@@ -138,6 +143,10 @@ module Shotengai
           errors.add(:id, '订单已支付，禁止修改商品快照。') 
         end
       end
+
+      def set_manager
+        self.manager = self.series.product.manager
+      end
   end
 
 end
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