null 写入 Postman 环境变量

问：

我想从 Json 响应中获取rating_id并将其写入环境变量。但是在发送请求时，“null”值总是写入变量

json 请求：

{
  "data": {
    "rating_id": "{{$guid}}",
    "collection_id": "7a313397-00de-49f5-bfb7-6341323ac053",
    "rating": "1",
    "user_comment": "test",
    "status": "1",
    "create_date": "2023-03-01 11:05:00+03",
    "create_user": "ivanov.ii"
  }
}

JSON 响应：

{
    "state": "success",
    "data": {
        "rating_id": "67e5b082-1c35-434f-b5e1-96eaf60310ea",
        "collection_id": "7a313397-00de-49f5-bfb7-6341323ac053",
        "rating": "1",
        "user_comment": "test",
        "status": "1",
        "create_date": "2023-03-01T16:51:00.087477Z",
        "create_user": "ivanov.ii"
    }
}

测试：

var jsonResponse = pm.response.json（）;

pm.environment.set（“rating_id”， jsonResponse.rating_id）;