I’m seeing a weird behavior with v0.12.0 (and 0.11...

# serialization

[leandro]

I’m seeing a weird behavior with v0.12.0 (and 0.11.1) where I’m trying to deserialize a data class, using Json.nonstrict with Retrofit 2.6.1.
The field is a String, and with it on my class I receive the message:

Field 'full_name' is required, but it was missing

but if I remove it then I get:

Encountered an unknown key full_name

[leandro]

The field exists in the generated class under build/classes/kotlin/main/

[leandro]

and it gets removed when I comment the field out. How can I see what’s happening when deserializing it?

[sandwwraith]

Do you have such filed in class definition?

[leandro]

yes, this is how the class is defined:

@Serializable
data class AuthResponse(
  @SerialName("full_name") val full_name: String,
  @SerialName("token") val token: String
)

[sandwwraith]

Well, indeed this is required filed, and if it is not present in your JSON, it is an error.

[sandwwraith]

If such key is present and JSON, but strictness validation fails, it's a bug; I'll check if this behaviour is present

[leandro]

i agree, but the field is present. Passing prettyPrint = true to my json configuration shows it

[leandro]

Using Json.plain I also get the same error. On this case I added a new field to the deserialized model due to its strictness but that’s not need on the client app.

[leandro]

Also happens on the newly released 0.13.0

[sandwwraith]

This code works fine for me:

val input = """{"full_name":"A","token":"B"}"""
        println(Json.nonstrict.parse(AuthResponse.serializer(), input))
println(Json.parse(AuthResponse.serializer(), input))

[leandro]

Is there something that i can try in order to find where the problem might be? peeking into the generated code, or maybe some flag to get debug logs?

[sandwwraith]

Unfortunately, there's no available way to debug generated code. You can see it (via action 'show kotlin bytecode' -> then decompile to Java), but afair breakpoints there won't work