如何使用 Laravel 获取这种格式的 JSON 数据？

我尝试将数据保存到MySQL数据库并成功保存数据。我想以这种格式获取 JSON 数据

{
   "response_code":0,
   "results":[
      {
         "question":"Here is my question?",
         "correct_answer":"Correct Answer",
         "incorrect_answers":[
            "wrong_1",
            "wrong_2",
            "wrong_3"
         ]
      }
   ]
}

但我以这种格式获取我的 JSON 数据

{
   "response_code":0,
   "results":[
      {
         "question":"Here is my question?",
         "correct_answer":"right_ans",
         "incorrect_answers_1":"wrong_1",
         "incorrect_answers_2":"wrong_2",
         "incorrect_answers_3":"wrong_3",
      }
   ]
}

这是我的 MySql 数据库

请建议我如何以我想要的格式获取我的 JSON 数据？如果您想要更多文件或信息，那么我将编辑我的问题。

 public function toArray($request)
    {
        return [
            "id"=>$this->id,
            "right_ans" =>$this->right_ans,
            "incorrect_answers_1" =>$this->wrong_1,
            "incorrect_answers_1" =>$this->wrong_2,
            "incorrect_answers_1" =>$this->wrong_3,
            "created"=>$this->created_at,
        ];
    }