I cannot parse Json data from retrofit what's the problem?

Question

Here's my code

interface ApiService {

@POST("sms-otp/request")
suspend fun loginTest(@Body testRequest: TestRequest): Response<TestResponse>
}


data class TestResponse(

@SerializedName("otp")
@Expose
var otp : String? = null,

@Expose
@SerializedName("otpId")
var otpId: Int? = null
)

Logic -

  loginRepository.loginTest(testRequest.phoneNumber!!).let {
        if (it.isSuccessful) {

            _res.postValue(Resource.success(it.body()))
            Log.d("_res", it.body().toString())
            Log.d("_res" , _res.value.toString())
            Log.d("_res", _res.value?.data.toString())

        } else {
            _res.postValue(Resource.error(it.errorBody().toString(), null))
        }
    }

Here is my Log , I think response code is 201, maybe success but no data in my model... please help me

enter image description here

Answer 1

You are getting a response from the server, as okhttp logging is showing. But, retrofit is not able to map it. As you have the wrong kotlin data class for the response.

{
  "code": "0000",
  "message": "ok",
  "data": {
    "otpId": 21,
    "otp": "518793"
  }
}

Response has otpData inside data object, but your TestResponse only contains otp properties.

For retrofit to map correctly, you have to define two data classes, one for the parent response and one for the otpData

Change TestResponse.kt to this

data class TestResponse(
    @SerializedName("code")
    @Expose
    val code: String,
    @SerializedName("data")
    @Expose
    val otpData: OtpData,
    @SerializedName("message")
    @Expose
    val message: String
)

Now, createOtpData.kt

data class OtpData(
    @SerializedName("otp")
    @Expose
    val otp: String,
    @SerializedName("otpId")
    @Expose
    val otpId: Int
)