Hello Guys, I am having hard time figuring out how I can connect my

Repository

and `ViewModel`'s livedata in-case of

@GET

request and observe them in fragment. I don't have this problem when the request type is

@POST

because I can use

Transformation.switchMap

on body and whenever the body changes repository's function gets invoked and emit value to the response live data something like this

val matchSetsDetail: LiveData<Resource<MatchDetailBean>> = Transformations.switchMap(matchIdLiveData) { matchId ->
        val body = MatchSetRequest(matchId)
        repository.getMatchSet(body)
    }

but in case of

@GET

request I have several query parameter the my View supplies I have this retrofit API call in repository class and the code looks like this

fun checkInCheckOutUser(apiKey: String, userId: Int, status: String, latitude: Double, longitude: Double, checkedOn: Long): LiveData<Resource<BaseResponse>> = liveData {
        emit(Resource.Loading())
        try {
            val response: Response<BaseResponse> = ApiClient.coachApi.checkInCheckOutUser(apiKey, userId, status, latitude, longitude, checkedOn)
            if (response.isSuccessful && response.body() != null) {
                if (response.body()!!.isValidKey && response.body()!!.success) {
                    emit(Resource.Success(response.body()!!))
                } else {
                    emit(Resource.Failure(response.body()!!.message))
                }
            } else {
                emit(Resource.Failure())
            }
        } catch (e: Exception) {
            emit(Resource.Failure())
        }
    }

and

ViewModel

class CheckInMapViewModel : ViewModel() {
    val checkInResponse: LiveData<Resource<BaseResponse>> = MutableLiveData()

    fun checkInCheckOut(apiKey: String, userId: Int, status: String, latitude: Double, longitude: Double, checkedOn: Long): LiveData<Resource<BaseResponse>>  {
        return repository.checkInCheckOutUser(apiKey,userId,status,latitude,longitude,checkedOn)
    }
}

Main problem is I want to observe

checkInResponse

but don't know how to pass repository's livedata same as I did with my post request above using

Transformations.switchMap

. Can anyone help me with this case?

You could write your VM as

class CheckInMapViewModel : ViewModel() {
    val _checkInResponse = MutableLiveData()

val checkInResponse: LiveData<Resource<BaseResponse>
    get() = _checkInResponse

    fun checkInCheckOut(apiKey: String, userId: Int, status: String, latitude: Double, longitude: Double, checkedOn: Long)  {
        _checkInResponse.value = repository.checkInCheckOutUser(apiKey,userId,status,latitude,longitude,checkedOn)
    }
}

and in

Activity

checkInMapViewModel.checkInResponse(this) { /* observe */}

checkInMapViewModel.checkInCheckOut(...) // Refreshes livedata

@pavi2410 Thanks for reply. As you can see my repository function emits a live data but with your approach it expecting

Resource<BaseResponse>

. I simply can not do

_checkInResponse.value = repository.checkInCheckOutUser(apiKey,userId,status,latitude,longitude,checkedOn)

because of this.

in my experience, repositories must not return livedata, your viewmodel validate repository's response and emit into livedata

Yeah, repository should be only for retrieving data, not observing them

what if you create mediator live data in view model and set returned liveData from repository as its source somethings like this. I'm facing same problem rn and I cant come up with better idea yet