I mean how to serialize some property into null va...

# squarelibraries

[Pavel.AZ]

I mean how to serialize some property into null value

[ibraiz_teamo]

add a ? to the type

data class Assets(@Json(name = "asset") val assetList: List<Asset>?)

[Pavel.AZ]

it deserialises to null but not serializes back

[Pavel.AZ]

https://stackoverflow.com/questions/54925974/square-moshi-how-to-serialize-some-value-to-null

[ibraiz_teamo]

try it with asLenient()

[ibraiz_teamo]

.addConverterFactory(MoshiConverterFactory.create(moshi).asLenient())

[ibraiz_teamo]

it alsoi has a withNullSerialization() method

[Pavel.AZ]

The solution was to added annotaiton to each property I want to keep null in json:

[Pavel.AZ]

@Retention(AnnotationRetention.RUNTIME)
@JsonQualifier
annotation class SerializeNulls {
companion object {
val JSON_ADAPTER_FACTORY: JsonAdapter.Factory = object : JsonAdapter.Factory {
override fun create(type: Type, annotations: Set<Annotation>, moshi: Moshi): JsonAdapter<*>? {
val nextAnnotations = Types.nextAnnotations(annotations, SerializeNulls::class.java) ?: return null
return moshi.nextAdapter<Any>(this, type, nextAnnotations).serializeNulls()
}
}
}
}

[eric]

yep. the JsonQualifier the way to go for having conditional serialization of nulls. https://stackoverflow.com/a/52265735