Hi folks, using Kotlinx.serialization with Ktor f...

# serialization

[KR]

Hi folks,

using Kotlinx.serialization with Ktor for JSON content

json(Json {
    prettyPrint = true
    isLenient = true
    encodeDefaults = true
    ignoreUnknownKeys = true
    useAlternativeNames = true
    coerceInputValues = true
    explicitNulls = false
})

this is my config

despite having encodeDefaults = true
I am unable to encode default values of data class to Json
Am I doing something wrong here or is this an existing issue?

[glureau]

explicitNulls = false ?

[KR]

yeah… that way I don’t encode nulls and when keys are missing while decoding default values are set.

[glureau]

Feels like "I want to encode defaults" and "I don't want to encode nulls" are conflicting in my mind (ex: val foo: String? = null => encode or not ??). Maybe one settings is changing the other.

[KR]

I have done this as per the documentation and
encodeDefaults = true & explicitNulls = false
by the naming convention it should do the expected but it doesn’t

[Nikky]

is there any default values that are not null ?

[KR]

yes there are

[Nikky]

this seems to be behave the way i expect it to

@Serializable
data class A(
	val a: String? = null,
    val b: Int = 0,
)

serializing this data class with default values ... and the settings you are using
a gets skipped because it ends up being null and b gets serialized

https://pl.kotl.in/-YkdiyRId

[KR]

thanks. I realised the mistake I was making.