My scenario
I use Coroutines and Room to save my app's user profile data. I have CompleteProfileActivity :in that User fill their information and confirm it( Confirm button ). I send them to server and observe response. If response is success. I save them to my ProfileDatabase.
My question How can I know my database is updated or my insertion is complete, my deletion is completed not by getting the size? @Insert @Delete is void return methods. So how can I know except the database size?
@Dao
interface ProfileDao {
@Insert(onConflict = OnConflictStrategy.IGNORE)
fun saveProfile(model:Profile)
@Query("SELECT * FROM profile_table")
fun getProfile():Deferred<Profile>
}
If the method call succeeded for insert, then it was succesful, otherwise you'd get an exception.
Also, these don't have to be void-returning methods.
You can have @Insert return the type of the primary key in the table, which will be the key of the newly inserted record.
@Insert(onConflict = OnConflictStrategy.IGNORE)
fun saveProfile(model: Profile): Int
In case of @Delete, it will return the number of rows deleted if you return an Int:
@Delete
fun deleteProfiles(profiles: List<Profile>): Int
Same goes for a more manual implementation using @Query, returns the number of rows affected if you return an Int:
@Query("DELETE FROM profiles")
fun deleteAllProfiles(): Int