Fix Order :incr_snapshot_ids

lib/shotengai/order.rb

@@ -148,14 +148,22 @@ module Shotengai
     end
     
     # into order
-    def incr_snapshot_ids= ids
-      ActiveRecord::Base.transaction do
-        ids.each { |id| 
-          # using update(shotengai_order_id: id) can not get self.id before save
+    # def incr_snapshot_ids= ids
+    #   ActiveRecord::Base.transaction do
+    #     ids.each { |id| 
+    #       # using update(shotengai_order_id: id) can not get self.id before save
+    #       Shotengai::Snapshot.find(id).update!(shotengai_order: self)
+    #     }
+    #   end
+    # end
+
+    attr_accessor :incr_snapshot_ids
+
+    after_save(if: :incr_snapshot_ids) do
+      Array(incr_snapshot_ids).each { |id| 
         Shotengai::Snapshot.find(id).update!(shotengai_order: self)
       }
     end
-    end
 
     # back to cart
     def gone_snapshot_ids= ids