Deserialize null or missing fields as None?

[BrianVallelunga]

I'm having a hard time figuring out exactly how to handle null or missing JSON fields when deserializing a record. My serializer settings are currently:

let serializerOptions =
    JsonFSharpOptions
        .FSharpLuLike()
        .WithAllowNullFields(true)
        .WithSkippableOptionFields(true)
        .ToJsonSerializerOptions()

I don't care much about how an Option type gets serialized. Either null or as a missing field is fine by me, but when deserializing I want both null and missing fields to deserialize as None. Right now I'm getting errors if null is present. Is there a magic set of options that gets me the behavior I want? Thanks for the help.

[drhumlen]

We're having the exact same problem. It would be nice if it treated null and absence the same way when deserializing (with the given options).

[pkese]

Same here.

[martin-bmc]

I have the same issue. In an API I want to allow a user to either not send an optional field or send it as null, However using the default options makes optional fields required and using WithSkippableOptionFieldswill set a null value to Some null. I would a configuration where they both would be None.

Also it seems like issue is similar to #151

[Tarmil]

This is released in v1.3.13:

JsonFSharpOptions.Default()
    .WithSkippableOptionFields(SkippableOptionFields.Always, deserializeNullAsNone = true)

[BrianVallelunga]

Thanks! I'm going to test this today.

[BrianVallelunga]

Works great, thanks