Deserialize Json array with JsonFx in unity

Question

Hello everyone, I dev an application with Json data, I'm using JsonFx and I have a Json like this : I use unity 4.5.6

 [
     {
         "id": "7", // all string value
         "lastname": "Meurot Desterhx",
         "firstname": "Ludovic",
         "phone": "",
         "mobile": "",
         "email": "destylia@hotmail.fr",
         "password": "5",
         "date_of_birth": "0000-00-00",
         "facebook_id": "",
         "facebook_link": "",
         "facebook_locale": "",
         "online": "1",
         "boutiques": {
             "fruity": 1, //int value
             "minicar": 2 // int value
         }
     }
 ]

So, I have two classes.

1 : UserClass.

2 : siteWebClass.

see the code: userClass

    public class userClass  
 {
 
     public string id {get;set;}
     public string email { get; set; }
     public string gameId { get; set; }
     public string userType {get;set;}
     public string connexionDate { get; set; }
     public string fbId { get; set; }
     public string fbEmail { get; set; }
     public string fbFirst_Name { get; set; }
     public string fbLast_Name { get; set; }
     public string fbName { get; set; }
     public string fbLink { get; set;}
     public string fbLocal { get; set; }
     public float Credit{get;set;}
     public string Ctype { get; set; }
     public List<webSiteClass> boutiques { get; set; }
     public List<userClass>userInfos;
     private static userClass instance;
 
     public userClass()
     {
 
     }
 
     public static userClass Instance
     {
         get
         {
             if (instance == null)
             {
                 instance = new userClass();
             }
             return instance;
 
         }
     }
     public userClass ( string _id )
     {
         id = _id;
         userInfos = new List<userClass> ( );
     }
 
     public userClass ( string _id, 
                       string _email, 
                       string _userType, 
                       string _connexionDate, 
                       string _fbId, 
                       string _fbEmail, 
                       string _fbFirst_Name,
                       string _fbLast_Name, 
                       string _fbName, 
                       string _fbLink, 
                       string _fbLocal,
                       string _Ctype,
                       List<webSiteClass> _boutiques,
                       float _Credit )
     {
         id = _id;
         email = _email;
         userType =_userType;
         connexionDate = _connexionDate;
         Credit = _Credit;
         fbId = _fbId;
         fbEmail = _fbEmail;
         fbFirst_Name = _fbFirst_Name;
         fbLast_Name = _fbLast_Name;
         fbName = _fbName;
         fbLink = _fbLink;
         fbLocal = _fbLocal;
         Ctype = _Ctype;
         for (int i = 0; i < boutiques.Count; i++) 
         {
             boutiques[i].websiteId = _boutiques[i].websiteId;
             boutiques[i].logo = _boutiques[i].logo;
             boutiques[i].name = _boutiques[i].name;
             boutiques[i].fruity = _boutiques[i].fruity;
             boutiques[i].minicar = _boutiques[i].minicar;
         }
         Credit = _Credit;
         userInfos = new List<userClass> ( );
     }

siteWebClass:

 using JsonFx.Json;
 using JsonFx;
 
 
 public class webSiteClass : MonoBehaviour
 {
     public int websiteId { get; set; }
     public string logo { get; set; }
     public string name { get; set; }
     public int fruity { get; set; }
     public int minicar { get; set; }
 
 
 
     public webSiteClass()
     {
 
     }
 
     public webSiteClass( int _websiteId,
                          string _logo, 
                          string _name, 
                          int _fruity, 
                          int _minicar)
     {
 
         websiteId = _websiteId;
         logo = _logo;
         name = _name;
         fruity = _fruity;
         minicar = _minicar;
 
     }
 }

So I deserialize the Json, it works but when I check the List "boutique" is empty. See my Deserialize code:

     public IEnumerator Connect ( string _eMail , string _Mdp, string _gameName, string _Ctype )
     {
         WWWForm form = new WWWForm ( ); // variable de type WWWForm, une "class aide" pour generer des données depuis un server web sous forme de formulaire (utilisateur, mdp etc...)
         eMail = _eMail;
         Mdp = _Mdp;
         gameName = _gameName;
         Ctype = _Ctype;
         form.AddField ( "email" , _eMail ); // on ajoute _eMail au formulaire
         form.AddField ( "password" , _Mdp );// on ajoute _Mdp au formulaire
         form.AddField ("gameName", "");
 //      form.AddField ("cType", _Ctype);
 
         WWW www = new WWW ( urlConnection , form );/* Variable de type WWW qui prend en paramettre un url en local, lien serveur, ou ftp. Il peut avoir comme ici en plus de l'url un formulaire. 
                                                     * Ici nous avons la variable "urlConnexion et le formulaire form) */
 
 
         yield return www;/* une fois l'url envoyer il est retourné sous un format qui est le Json, qui une chaine de caractère avec une syntaxe spécifique.
                             Le Json contients les données de l'utilisateur son Nom d'utilisateur son mot de passe */
 
         Debug.Log (www.text);
 
         if ( www.error == null )// si le json n'est pas éronné
         {
             string[] UrlSplit = www.text.Split('\\'); // le Json renvoyer contient des '\' nous les enlevons pour pouvoir le deserialiser 
             string concat = "";
             for (int i = 0; i < UrlSplit.Length; i++) 
             {
                 concat+=UrlSplit[i];
             }
             Debug.Log(concat);
             userClass[] userJson = JsonFx.Json.JsonReader.Deserialize<userClass[ ]> ( www.text); // on decoupe le format json et on met ses morceaux dans une liste qui ici est une liste de type userClass 
 
             //le json contenait les Id de l'utilisateur ainsi que son mot de passe  et d'autre paramettres, nous remplissons la liste.
 
             for (int i = 0; i < userJson.Length; i++) 
             {
                 Debug.Log(userJson[i].id);
                 Debug.Log(userJson[i].email);
                 Debug.Log(userJson[i].boutiques);
                 Debug.Log(userJson[i].boutiques.Count);
                 foreach (webSiteClass item in userJson[i].boutiques)
                 {
 
                     Debug.Log("item : " +item);
 
                 }
             }
 
             user.id = userJson [ 0 ].id; 
             user.email = userJson [ 0 ].email;
             user.userType = userJson [ 0 ].userType;
             user.connexionDate = userJson[ 0 ].connexionDate;
             user.Credit = userJson[ 0 ].Credit;
 
 
 
 
             if ( eMail == userJson [ 0 ].email && user.Ctype == userJson[0].Ctype)// si eMail que l'utilisateur a taper est le meme que celui dans la BDD
             {
                 Debug.LogWarning ( "good" );
                 winChoose = true;
             }
 
         }
         else
         {
             Debug.LogError ( "wrong" ); // l'utilisateur a écrit un mauvais login ou un mauvais mdp.
             feedBackError = "<color=red>" + "Mauvais login ou Mot de passe !" + "</color>";
             yield return new WaitForSeconds ( 2f );
             feedBackError = "";
         }
     }

see my debug log:

Debug.Log(userJson[i].boutiques); = System.Collections.Generic.List`1[webSiteClass]

Debug.Log(userJson[i].boutiques.Count); = 0

Any idea ? I'm Lost, thank for help and have you nice day.

Answer 1

There are a few things wrong here but the two important issues:

First, your JSON doesn't match your model. Specficially the botiques field contains an object rather than an array (line 15):

 "boutiques": {
      "fruity": 1, //int value
      "minicar": 2 // int value
  }

Should be:

 "boutiques": [
     {
          "fruity": 1, //int value
          "minicar": 2 // int value
     }
 ]

That is why it fails to deserialize. Type mismatch.

The next biggest issue is in your copy constructor. You're going to get a NullReferenceException if you pass in a list of boutiques (line 73):

     for (int i = 0; i < boutiques.Count; i++)  // <= boutiques is null here
      {
          boutiques[i].websiteId = _boutiques[i].websiteId;  // <= boutiques[i] is null here
          boutiques[i].logo = _boutiques[i].logo;
          boutiques[i].name = _boutiques[i].name;
          boutiques[i].fruity = _boutiques[i].fruity;
          boutiques[i].minicar = _boutiques[i].minicar;
      }

You need to instantiate a new webSiteClass for each that you are copying. Also you probably want to ensure that the passed in list isn't null. Something like:

 if (_boutiques != null) {
     boutiques = new List<webSiteClass>();
     for (webSiteClass b in _boutiques) 
     {
         boutiques.add(
             new webSiteClass(b.websiteId, b.logo, b.name, b.fruity, b.minicar);
     }
 }

There a bunch of little issues like that in this code. Also if you are going to use an item in a List multiple times (e.g., _boutiques[i]) then it makes sense to pull that value to a local temporary variable so you aren't traversing the list over and over again (i.e., [i] is not free):

 webSiteClass b = _boutiques[i];
 ... = b.webSiteId;
 ... = b.logo;
 ... = b.name; // etc.

Finally, unless C# naming conventions are different when using Unity (I've never used Unity but I wrote JsonFx so I'm familiar with C#), then you have a lot of things going on. Typically classes, methods and properties are PascalCase (i.e., start with a capital letter) and fields are camelCase (i.e., start with a lowercase letter). Local variables and parameters typically do not start with an underscore (`'_'`). If you need to differentiate between the class member and the local variable then you use this.myFieldName.

Like I said I've never used Unity so take some of that with a grain of salt. Sometimes those kinds of rules get modified in mixed environments.

Deserialize Json array with JsonFx in unity

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