修改

app/system/controller/ShowTemplate.php

@@ -95,6 +95,10 @@ class ShowTemplate extends  BaseController{
         $save["unreal_sales"] = (int)$post["unreal_sales"];
         $save["admin_time"]   = time();
         $save["admin_id"]     = $request->adminInfo['id'];
+        if($save["price"]<0 || $save["old_price"]<0){
+            return app('json')->fail("请输入正确的价格");
+        }
+        
         $id = empty($post["id"])?0:(int)$post["id"];
         $codeWhere[]=["code","=",$save["code"]];
         if($id>0){