修复支付问题

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

                 $order_new = clone $order;
                 $order_new->id = null;
                 $order_new->save();
+                dd($order_new->exists());
                 $order->delete();
                 $order_id = $order_new->id;
             }

manage-server/app/Models/Order.php

     public function mergeFillable($fillable) {
         $this->fillable = array_merge($this->fillable, $fillable);
     }
+
+    public function exists() {
+        return parent::exists;
+    }
 }