类型不匹配所需列表找到 LiveData

Question

我在以下方面遇到类型不匹配错误：

 class LoginViewModel(application: Application) : AndroidViewModel(application) {
     private val authRepository = AuthRepository(database)

     private val _auth = MutableLiveData<List<AuthModel>>()
     val auth: LiveData<List<AuthModel>>
        get() = _auth

     private fun apiLogin(username: String, password: String) {
        viewModelScope.launch {
          try{
              **_auth.value = authRepository.login(username, password)**
            }
        }
    }

class AuthRepository(private val database: xdb) {

       val auth: LiveData<List<AuthModel>> =
        Transformations.map(database.authDao.getAuthInfo()) {
            it.asDomainModel()
        }

      suspend fun login(username: String, password: String): LiveData<List<AuthModel>> {
        withContext(Dispatchers.IO) {
            val auth = Network.retrofitInstance?.create(AuthService::class.java)
            val i = auth?.doLogin(username, password)?.await()
            if (i != null) {
                database.authDao.insertAuthInfo(*i.asDatabaseModel())
            }
        }
        return auth
    }
}


@Dao
interface AuthDao {
    @Query("SELECT * FROM auth")
    fun getAuthInfo(): LiveData<List<AuthEntities>>
}

为什么此代码返回类型不匹配 _auth.value = authRepository.login(username, password)？

确切的错误信息：

类型不匹配
必填清单？
找到 LiveData

Answer 1

_auth.value的数据类型为List<AuthModel>。

authRepository.login(username, password)的数据类型为LiveData<List<AuthModel>>。

它们是不同的。

试试：

_auth.value = authRepository.login(username, password).value