:pray:

# serialization

[kingsley]

🙏

[Karlo Lozovina]

with regards to 1): does setting encodeDefaults work?

[kingsley]

Unfortunately not. I believe encodeDefaults only works for serializing back to json

[Karlo Lozovina]

oh, you're deserializing, and the JSON is missing a property? for me by default that deserializes to a default value, and I usually set those to null ...

[Javier]

did you add ignoreUnknownKeys = true ?

[Javier]

If it doesn't work, you have to add default parameters

@Serializable
data class Some(val property: String? = null)

[Karlo Lozovina]

yes, you must have default parameters!

[kingsley]

Indeed setting to null works, but I was hoping to avoid that. Since the field’s already nullable

ignoreUnknownKeys only works for json keys that don’t exist in my model

[Karlo Lozovina]

ignoreUnknownKeys are for a different problem, I'd say

[Karlo Lozovina]

ah I see, I wanted that as well... if the key is nullable, the default should be null without specifying it excplicitly

[Javier]

Yep, I think I read about this problem in an issue and default parameters was the only option, maybe that issue has been updated and has a global workaround

[Karlo Lozovina]

but I couldn't make it work, don't think there's an option for that - I have SomeType? = null basically everywhere

[kingsley]

I see. That’s too bad. But I guess I can live with this

[Javier]

yep, in one project I had to replace it with IntelliJ replace feature because I had a lot of them 😅

[Karlo Lozovina]

as far as 4) goes: there's file level anotation @file::UseSerializers

[Javier]

4) should not be solved via JsonModule and add it to the Json used by jake converter?

[Karlo Lozovina]

for 2) I'm also doing it manually, by implementing a Kserializer for my type... don't think there's an annotation that specifies a default enum value...

[kingsley]

@Javier I’m using serializerModule + @Contextual annotation. But I also have another field of the same type but I want a different serializer for that one. So I have to put @Serializable(with=Serializer::class), but I was hoping I could apply this on a custom annotation and then I can do @CustomAnnotation instead

[kingsley]

@Karlo Lozovina for 2, Moshi has EnumJsonAdapter#withUnknownFallback, but kotlinx.serialization doesn’t seem to have anything similar

[kingsley]

The issue is here FYI:
https://github.com/Kotlin/kotlinx.serialization/issues/1024