Hi, [Not directly related to http4k, please redire...

# http4k

[Gopal S Akshintala]

Hi, [Not directly related to http4k, please redirect me if this is not relevant] I am looking for guidance to write a Polymorphic Moshi adapter using a Boolean field as TypeLabel. I scouted through the http4k repository to find any examples but in vain. I have a usecase where the adapter needs to be decided by the boolean type isSuccessful. A over simplified example:
Success response:

{
  "isSuccessful": true,
  "value": "Okay!"
}

Failure response:

{
  "isSuccessful": false,
  "error_logs": {
    "order": 66
  }
}

All the examples I referred use String as TypeLabel. How can I use boolean field instead of String?

[Andrew O'Hara]

Indeed this isn't directly related to Http4k, but I think we can help anyway. I don't think you'll find an automatic way to do polymorphic serialization without the standard type label. But you can build a custom Moshi JsonAdapter to do it.

See the Http4k SQSEventAdapter and registering it to a custom Moshi.

[Gopal S Akshintala]

Thanks @Andrew O'Hara for the help. I had custom adapter as the last option, but looks like there is no way to leverage PolymorphicJsonAdapterFactory. Thanks for confirming!