fix

AutoTurnOver.Models/dc_auto_shortage_push.cs

@@ -27,6 +27,7 @@ namespace AutoTurnOver.Models
         /// </summary>
         public int type { get; set; }
 
-        public int stocks { get; set; }
+        private int _stocks;
+        public int stocks { get { return Math.Max(0, _stocks); } set { _stocks = value; } }
     }
 }

AutoTurnOver.Models/dc_return_goods_push.cs

@@ -16,6 +16,7 @@ namespace AutoTurnOver.Models
 
         public DateTime push_time { get; set; }
 
-        public int stocks { get; set; }
+        private int _stocks;
+        public int stocks { get { return Math.Max(0, _stocks); } set { _stocks = value; } }
     }
 }