Anyone happen to know why my serializer I've written for an enum class is failing with this `JsonDec...

# serialization

[Shan]

Anyone happen to know why my serializer I've written for an enum class is failing with this JsonDecodingException? What is strange is that it works in certain cases, but fails in others. When I get back this response:

{
  "id": 1,
  "status": 1,
  "info": 0
}

It works fine and returns IN_PROGRESS. When I get this response:

{
  "id": 3,
  "status": 3,
  "info": 0
}

I encounter this error:

kotlinx.serialization.json.JsonDecodingException: Invalid JSON at 28: Expected string or non-null literal

Which is thrown from takeString() in JsonReader.kt after trying to call decodeInt(). If both of them were failing I would be a little less confused, but with only one of them failing I am at a loss. Is it interpreting the 3 as a byte or something, and thus failing the TC_OTHER and TC_STRING check, whereas the 1 is interpreted as a TC_STRING somehow? All I can think of 🤔

Untitled.kt

[turansky]

You can use @SerialId for automatic serialization

[turansky]

Untitled

[Shan]

ooh, will try it out. thanks! (still curious as to why the above code is returning those results tho..)

[turansky]

Enums are serailizable by default

[turansky]

"IN_PROGRESS" -> <http://StatusCode.IN|StatusCode.IN>_PROGRESS

[Shan]

Yes as a string using their declared enum name, but with a parameter & a custom serializer I would expect the above code I listed to work, unless I'm missing something.

[turansky]

1. Serializer as separarte object (not companion)
2. @Serializer(with=...) on enum

[Shan]

@Serializable
enum class StatusCode {
    @SerialId(1) IN_PROGRESS,
    @SerialId(2) SHOULD_RETRY,
    @SerialId(3) SHOULD_NOT_RETRY;
}

With this response:

{
  "id": 1,
  "status": 1,
  "info": 0
}

Produces:

kotlinx.serialization.SerializationException: StatusCode does not contain element with name '1'

[Shan]

I'll try it with a separate serializer as its custom serializer besides the companion object

[Shan]

Ah, no that has the same error as the first one.

[Shan]

Just going to map it from an Int after the call is made for now, will revisit this later

[turansky]

SerialId doen’t work in your cases?

[Shan]

I did try, it gave me the error I listed above, the StatusCode does not contain element with name '1'. Not sure if I implemented it correctly or not, couldn't find solid information on how I was supposed to use it unfortunately, just a few scattered examples.

[turansky]

Int wrap required 😞

[Nikky]

not sure if this was mentioned before but this

values().first {
            it.code == decoder.decodeInt()
        }
    }

seems like it takes a new int from the decoder for each comparison, so it might not have more data
it would make more sense to decode the value and then search in values()