Cannot deserialize JSON object

Unity Engine
1

Your typical error:

I went to JSONLint which claims my JSON is valid.
Sometime back one of you wondered whether there was a “BOM” in my file, I don’t know, so here are the hexes:

5182346--514781--isbom.png
5182346--514781--isbom.png456×564 40.2 KB

I have Debug.Logged the value directly one line before attempt of deserialization (the location where the error is thrown). Console shows indeed a string and that string is my JSON string.

Weirdly enough I have a general function that handles this (it skips loops, read files and then deserializes it), this is 3th line that throws an error. I used this function twice before and no errors, but it somehow is stuck on this line.

So, what should I do?

  1. Yes, the path is correct, otherwise it wouldn’t read the JSON into console log.
  2. Nothing is changed between them, its a closed function that simply performs some internal processing.
2

Assuming that you’re using JSONUtility – JSONUtility doesn’t support deserializing raw arrays (eg. [1,2,3]), even though that is technically a valid JSON object. In order to deserialize lists or arrays, you need to place them inside of another object and serialize that, eg.

[Serializable]
class ListWrapper {
  public List<int> list;
}

Which will give you JSON along the lines of { "list": [1,2,3] }.

This is what the error was referring to.

3

I’m so sorry, I forgot to include the line that causes this mess:
return JsonConvert.DeserializeObject<T>(data);
Does this change your answer?

4

JsonConvert can handle deserializing lists, but this also isn’t a Unity-specific issue. Here is a StackOverflow question about this error.

5

Ah, I see. Instead of defining it as single item, I defined the T to be a List. Now it works. Thanks.

I doubt more than 10% of Scripting forum’s threads are actually about Unity-specific issues. I believe majority, including myself, use this forum as means to get help from good-willed people in any C# questions that are involved in creation of a videogame in Unity. Major of our troubles don’t come from misuse of Unity, but lack of understanding of C#.