How to make StrawberryShake working with JSON scalar type

[antyrama]

Hi,

I have a JSON type in my schema but autogenerated code fails to convert it throwing InvalidOperationException with massage The requested operation requires an element of type String, but the target element has type Object and the object is of type JsonElement.
I found this article https://chillicream.com/docs/strawberryshake/scalars and try to follow it but actually, after applying all changes, it still fails with the same exception, with just in a bit differently auto generated code. Article suggest to use as a TSerialized when implementing ScalarSerializer<> to use object type which fails at code generation with message error SS0006: Serialization format not supported..

My serializer:

public class JsonValueSerializer : ScalarSerializer<string, JsonElement>
{
    public JsonValueSerializer()
        : base("JSON")
    {
    }

    public override JsonElement Parse(string serializedValue)
    {
        ...
    }

    protected override string Format(JsonElement runtimeValue)
    {
        ...
    }
}

schema.extensions.graphql

extend scalar JSON
  @serializationType(name: "global::System.String")
  @runtimeType(name: "global::System.Text.Json.JsonElement")

Dependency injection:

services.AddSerializer<JsonValueSerializer>();
services.AddCrystallizeClient();

An example of data from server response, marked problematic property:

StrawberryShake dependencies are in 12.14.0 version.

I ran into many articles, issued bugs, suggestions but nothing is solving the issue, this is so confusing.

Any ideas on solution to above?

Cheers
P

[antyrama]

It's solved now.

• You don't need to implement any additional serializer, it's already there StrawberryShake.Serialization.JsonSerializer, this thread helped Strawberry Shake query with scalar AnyType fails. #3543

• You have to add below to your schema.extensions.graphql file

   extend scalar JSON
     @serializationType(name: "global::System.Text.Json.JsonElement")
     @runtimeType(name: "global::System.Text.Json.JsonDocument")
  

• You have to register in IoC the above serializer with name of your custom scalar services.AddSerializer(new JsonSerializer("JSON"));

This is it and that's it!
I whish I could read the above in documentation 3 days ago, instead of pulling my hair and reverse engineer code ¯_(ツ)_/¯

Cheers
P