just racked my brain and wasted a few hours, becau...

# ktor

[Horatio Thomas]

just racked my brain and wasted a few hours, because the default json serialization for web sockets and content negotiation uses different default values for encoding defaults. In content negotiation encodedefaults defaults to true and in websockets it defaults to false

[Aleksei Tirman [JB]]

As I can see, in the Ktor code base the encodeDefaults property for all default formats is set to true. Сan you describe how to reproduce the inconsistency?

[Horatio Thomas]

you can see here

[Horatio Thomas]

https://github.com/TENET-THEORY/knance/blob/ws/ktor/src/main/kotlin/io/tenetinc/knance/ktor/Application.kt#L74

[Horatio Thomas]

if i dont include this line it doesnt encode defaults

[Aleksei Tirman [JB]]

You're right. When you call the json method while configuring the ContentNegotiation plugin, a predefined DefaultJson object is used that has the encodeDefaults property set to true . When you create an instance of the KotlinxWebsocketSerializationConverter , you have to provide your own instance of the format. For consistency, you can use the DefaultJson object when creating an instance of KotlinxWebsocketSerializationConverter or use a shared instance of the format in both places.

[Horatio Thomas]

gotcha. yeah kinda confusing because i was using this one at first: https://github.com/Kotlin/kotlinx.serialization/blob/master/formats/json/commonMain/src/kotlinx/serialization/json/Json.kt#L100