Parse Complex Json

Unity Engine
,
1

Hello everyone,
i have been working with a coworker with json in dynamoDB. when i try to do a query, DynamoDB showme the next json

[
   {
      "n_request":"",
      "posicion":"",
      "velocidad":"",
      "client_id":"r2",
      "status":"free",
      "PartitionKey":3.0
   },
   {
      "n_request":"",
      "posicion":"",
      "velocidad":"",
      "client_id":"r1",
      "status":"free",
      "PartitionKey":2.0
   },
   {
      "n_request":"",
      "posicion":"",
      "velocidad":"",
      "client_id":"c2",
      "status":"free",
      "PartitionKey":1.0
   },
   {
      "n_request":"",
      "posicion":"",
      "velocidad":"",
      "client_id":"c1",
      "status":"free",
      "PartitionKey":0.0
   }
]

i do the deserialisation with one simple json and works. but when i try to deserialize this complex json i can’t. here are objects and C# code.

public class JsonObjects
{
    public DockiData[] allDockiData;
}

[Serializable]
public class DockiData
{
    public string n_request;
    public string posicion;
    public float velocidad;
    public string client_id;
    public string status;
    public string PartitionKey;
    public int posX, posY;
    char[] deleteLetters = { '[', ']', ',' };

    public void SplitPos()
    {
        string[] positions = posicion.Split(deleteLetters, 4, StringSplitOptions.None);
        posX = int.Parse(positions[1]);
        posY = int.Parse(positions[2]);
    }
}

and in here i deserialize the json

    IEnumerator RequestJson()
    {
        UnityWebRequest carInformation = UnityWebRequest.Get(url);


        yield return carInformation.SendWebRequest();

        if (carInformation.isHttpError || carInformation.isNetworkError)
        {
            Debug.Log(carInformation.error);

        }
        else
        {
            string json = carInformation.downloadHandler.text;
            print(json);
            clients = JsonUtility.FromJson<JsonObjects>(json);


       

          
        }



    }

when i run the project apear the next issue:

ArgumentException: JSON must represent an object type.
UnityEngine.JsonUtility.FromJson (System.String json, System.Type type) (at <0618d0873e03447096799ae90b4ad4f1>:0)
UnityEngine.JsonUtility.FromJson[T] (System.String json) (at <0618d0873e03447096799ae90b4ad4f1>:0)
JsonLoader+d__5.MoveNext () (at Assets/Scripts/JsonScripts/JsonLoader.cs:46)
UnityEngine.SetupCoroutine.InvokeMoveNext (System.Collections.IEnumerator enumerator, System.IntPtr returnValueAddress) (at :0)

thanks for your help and regards.

2

your json is a naked array, which JsonUtility doesn’t support. You must wrap it in a json object, as such:

{
  "allDockiData": [
    // your json array here
  ]
}
1 Like
3

thanks it works.