C#•11mo ago

✅ How to deal with different JSON types

I have an API endpoint and depending on the query it can return a list of objects or an object as such: Query for multiple

{"option": "1", "response":[{"A": "A"}, {"B": "B"}]}

{"option": "1", "response":[{"A": "A"}, {"B": "B"}]}

Query for single

{"option": "1", "response":{"A": "A"}}

{"option": "1", "response":{"A": "A"}}

For now I'm only allowing queries for multiple but would like to support both.

    public class Response
    {
        public string A { get; set; }
        public string B { get; set; }
    }

    public class Root
    {
        public string option { get; set; }
        public List<Response> response { get; set; }
    }

    public class Response
    {
        public string A { get; set; }
        public string B { get; set; }
    }

    public class Root
    {
        public string option { get; set; }
        public List<Response> response { get; set; }
    }

Is there a way to support this?

6 Replies

Angius•11mo ago

Oof, malformed JSON is never fun to deal with... You'll need a custom converter: https://stackoverflow.com/a/59430729/6042255

PannekoekjeOP•11mo ago

I'm using polymorphic deserialization as well 😦 Already tried a custom converter, wont work in combination with it I found this

PannekoekjeOP•11mo ago

https://github.com/dotnet/runtime/discussions/81950

GitHub

Combining 'JsonDerivedType' attribute with a custom 'JsonConverter'...

Issue summary The polymorphic JSON deserialization in System.Text.Json has some limitations when combined with custom JSON converters. This is documented here: Polymorphism using type discriminator...

PannekoekjeOP•11mo ago

Oh I see in the thread you linked you can use it on specific properties, I'll try that out Woo, that works 🙂 thx

Denis•11mo ago

$close

MODiX•11mo ago

Use the /close command to mark a forum thread as answered

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✅ How to deal with different JSON types