help parsing json object

Scripting C# & .NET
,
1

hi im trying to parse json obj using JsonConvert.DeserializeObject<>() function
i have created a class to map my json object to , also my json obj is in a c# sharp file that i import
in a class that manage my json database

the problem is when i deserialized the json object to my class and used it used it outside of class i get
the key of the json object but the value is null

her is my code:

namespace DigimonsDex
{
    public class DigiDex
    {
        private Dictionary<string,Digimon> digimons;
        private string digimons_json;
        public DigiDex()
        {
            var jsonSettings = new JsonSerializerSettings()
            {
                MissingMemberHandling = MissingMemberHandling.Error
            };
            digimons_json = Digimon_database.generateDigimonJsonData();
            string jsonResult = JsonConvert.DeserializeObject(digimons_json).ToString();
            digimons = JsonConvert.DeserializeObject<Dictionary<string, Digimon>>(jsonResult,jsonSettings);
           
        }

        public Digimon getDigimonByName(string digimon_name)
        {
            return this.digimons[digimon_name];
        }

        public Dictionary<string, Digimon> getallDigimons()
        {  
            return digimons;
        }
    }
}

my class that i use for storying the json obj:

    public class Digimon
    {
    public int num { get; set; }
    public string name { get; set; }
    public string gender { get; set; }
    public string stage { get; set; }
    public string type { get; set; }
    public List<string> attribute { get; set; }
    public BaseStats baseStats { get; set; }
    public List<string> abilities { get; set; }
    public string color { get; set; }
    public List<string> eggGroups { get; set; }
    public int memoryusage { get; set; }
}

public class BaseStats
{
    public int hp { get; set; }
    public int atk { get; set; }
    public int def { get; set; }
    public int spa { get; set; }
    public int spd { get; set; }
    public int spe { get; set; }
}

the error im getting:
NullReferenceException: Object reference not set to an instance of an object
logic.getDigimonSpeed (System.String digimon_name) (at Assets/logic.cs:230)
logic.setTurnBar (System.Collections.Generic.List`1[T] digimonlist) (at Assets/logic.cs:238)
SceneLogic.Start () (at Assets/SceneLogic.cs:22)

pleas advise me regarding this issue
thanks in advance

2

This has nothing to do with JSON. You’re not initializing your collections.

The answer is always the same… ALWAYS!

How to fix a NullReferenceException error

https://forum.unity.com/threads/how-to-fix-a-nullreferenceexception-error.1230297/

Three steps to success:

  • Identify what is null ← any other action taken before this step is WASTED TIME
  • Identify why it is null
  • Fix that

IF you come to a problem with JSON, once you fix the trivia above, keep this in mind:

Also, always be sure to leverage sites like:

https://csharp2json.io

3

Which line is it erring on because the lines of code you provided do not match the lines in the error.

4

the error pointing to a function that return the the class containing the data of the json

 public  void setTurnBar(List<Digimon> digimonlist)
{
     string digimon_name = digimonlist[0].name;
     string digimon2_name = digimonlist[1].name;
     int digimon_speed = getDigimonSpeed(digimonlist[0].name.ToLower());
     int digimon2_speed = getDigimonSpeed(digimonlist[1].name.ToLower());
  
}

 public int getDigimonSpeed(string digimon_name)
{
     int digimon_speed = digimons[digimon_name].baseStats["spe"];
5

for now i know where is the problem , i have a Logicmaneger object that mange my game logics , inside that game object I’m initiating the database manager class and initiate a variable containing my data base , for some reason when I print the variable inside start function I can see my object and its values , but inside other function in the Logicmaeger object script I get keys with null values?

(the database class dos not extend MonoBehaviour class)

6

problem solved , it seems I needed to initiate my object in Awake() function to initiate my object before scene is started
what case my issue is that I was using the variable contain my data before it is initiated because its waiting for the scene to start to initiate it