修复delete问题

manage-server/app/Http/Controllers/ProductController.php

         } else {
             $product = new Product;
             $product->status = 0;
+            $product->collect_num = 0;
+            $product->sell_num = 0;
         }
         if ($name && $info && $classify && $color) {
-            $product->collect_num = 0;
             $product->name = $name;
             $product->info = $info;
             $product->color = $color;