Wrapped adapter does not wrap the post payload in the given path when serializing

[prashand]

Wrapped adapter is extremely convenient when deserializing unnecessarily wrapped json responses without having to create wrapper classes.

But it doesn't seem to work when serializing POST data.

Endpoint: POST api/{surveyId}/answers
Example Body:

{                                        //SurveyAnswerPayload.class
  "answers": [
    {                                     //SurveyAnswer.class
      "questionId": "1",
      "answer": "Foo"		
    }, {
      "questionId": "2",
      "answer": "Bar"
    }
  ]
}

Trying to use Wrapped adapter to avoid creating a wrapper object SurveyAnswerPayload like so:

public class SurveyAnswer {
    @Json(name = "questionId")
    public String questionId;

    @Json(name = "answer")
    public String answer;
}

public interface SurveyService{
  @POST("surveys/{surveyId}/answers")
  @Wrapped(path = {"answers"})
  Call<Void> postAnswers(@Path("surveyId") String surveyId, @Body List<SurveyAnswer> answers);
}

Sadly this doesn't work. It serializes into [{"questionId":"1","answer":"A"},{"questionId":"2","answer":"B"}]

Wrapper class SurveyAnswerPaylod is needed here to get it wrapped in a parent "{"answers":[{"questionId":"1","answer":"A"},{"questionId":"2","answer":"B"}]}"

class SurveyAnswerPayload{
  @Json(name = "answers")
  public List<SurveyAnswer> answers;
}

[serj-lotutovici]

Check out LazyAdaptersRetrofitTest.java there's a service method that utilizes this.
Change SurveyService to be:

public interface SurveyService{
  @POST("surveys/{surveyId}/answers")
  Call<Void> postAnswers(@Path("surveyId") String surveyId,   @Wrapped(path = {"answers"}) @Body List<SurveyAnswer> answers);
}