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Question by Zulu92 · Dec 10, 2015 at 02:04 PM · scripting problemprogramming

JsonUtility not working

Hello, i use this code:

 string input = @"{""first"": ""Foo"", ""last"": ""Bar""}";
 var res = JsonUtility.FromJson<Dictionary<string, object>> (input)

But variable "res" is empty dictionary. What i do wrong ? The same situation i have when i use this code:

 Dictionary<string, object> tmpDict1 = new Dictionary<string, object> ();
 tmpDict1.Add("first", "Foo");
 
 Dictionary<string, object> tmpDict2 = new Dictionary<string, object> ();
 tmpDict2.Add("second", "Joe");
 
 List<Dictionary<string, object>> lst = new List<Dictionary<string, object>> ();
 lst.Add (tmpDict1);
 lst.Add (tmpDict2);
 
 var res = JsonUtility.ToJson(lst);

The variable "res" is empty string like "{}". What is it ? Why is it ?

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Answer by zeh · Dec 12, 2015 at 06:32 PM

Simply put, Unity does not support serialization and deserialization of dictionaries. As it is, JsonUtility is useless unless you want straight class serialization/deserialization from/to models that already exist.

If your data is in a dictionary, you can serialize it if you convert to arrays of keys and values first. But then the JSON won't be following the same schema.

I hope they'll support actual Dictionaries soon. You may want to watch this thread or vote for this request.

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