Yeah there's nothing wrong with using sequential integer IDs in the database. But objects should be assigned random unique IDs as well, which is how they are referenced by and presented to the outside world. The random ID is what is presented to the frontend/user. I'm not sure what the issue you had with generating random integers for primary keys was, it seems like that should work fine. Is it because the index has to be rebuilt when an value is inserted into the middle of the ordered sequence?