已完结的工单无法删除

@@ -126,6 +126,9 @@ class WorkOrderController extends BaseController
         if (!$workOrder) {
             $this->response('工单未找到', 404);
         }
+        if ($workOrder->status >= WorkOrder::STATUS_COMPLETED)
+            $this->response('已完结的工单不能删除', 403);
+
         if ($this->user['type'] != 1 && $workOrder->project_user_id != $this->user['id']) {
             // 只有项目负责人可以删除工单
             $this->response('无权限删除该工单', 403);