```

@Insert(onConflict = IGNORE)

abstract suspend fun insert(comic: ComicEntity): Long

@Transaction

open suspend fun upsert(comic: ComicEntity) {

insert(comic)

.takeIf { it == -1L }

?.let { update(comic) }

}

```

https://github.com/hoc081098/ComicReaderApp_MVI_Coroutine_RxKotlin_Jetpack/blob/master/app/src/main/java/com/hoc/comicapp/data/local/dao/ComicDao.kt