Trying to insert a list of items and Room is throwing the following error : `error: Not sure how to ...

# android

[Sivan]

Trying to insert a list of items and Room is throwing the following error :
error: Not sure how to handle insert method's return type.

Kotlin version : 1.6.0
Room version : 2.4.2

Here is my DAO :

@Dao
interface UserDao {
   .....

    @Insert(onConflict = OnConflictStrategy.IGNORE)
    fun loadUsers(userCacheEntities: List<UserCacheEntity>): Long

   .....
}

[tseisel]

Your function should probably be declared as suspend, otherwise request would have blocked a thread

[Sivan]

Tried that. Doesn't work. The error is thrown during gradle build so the app doesn't even run.

[Adrijan Rogan]

You are inserting a list of values, therefore you cannot return a single long value -- return Unit or a list of longs or LongArray instead, depending on your needs

[Sivan]

Bingo! That works. Makes sense. Thanks a lot for this 🙂