I am using Kotlinx serializer for serializing/des...

# android

[Koya Sivaji]

I am using Kotlinx serializer for serializing/deserializing of data classes with retrofit. I need to skip the null values from serialization, but I couldn’t find the way to do that

here is my data class

@Serializable
data class Attributes(
    val home: String? = null,
    val room: String? = null,
    val announcement: Int? = null,
    val push_notification_enabled: Int? = null
)

when I called Attributes().serialize() , the resulting json as below

"attributes":{
      "home":null,
      "room":"null",
      "announcement":null,
      "push_notification_enabled":null
   }

what is expected is

"attributes":{}

Note: serialize() is an extension function as below

inline fun <reified T: Any> T.serialize(): String {
    return Json.stringify(T::class.serializer(), this)
}

Basically I want to exclude all null params from serialization. I tried with by setting JsonConfiguration( encodeDefaults = false) , but still resulting json includes null fields from data class. Anyone has idea of how to do that

[okarm]

#serialization

[Justin Shapiro]

you want JsonTransformingSerializer to drop the nulls after you serialize. https://github.com/Kotlin/kotlinx.serialization/blob/master/docs/json_transformations.md