08-02-2023, 03:39 PM
By using the hibernate `@Transactional` annotation, if you get an object from the database with lazy fetched attributes, you can simply get these by fetching these attributes like this :
@Transactional
public void checkTicketSalePresence(UUID ticketUuid, UUID saleUuid) {
Optional<Ticket> savedTicketOpt = ticketRepository.findById(ticketUuid);
savedTicketOpt.ifPresent(ticket -> {
Optional<Sale> saleOpt = ticket.getSales().stream().filter(sale -> sale.getUuid() == saleUuid).findFirst();
assertThat(saleOpt).isPresent();
});
}
Here, in an Hibernate proxy-managed transaction, the fact of calling `ticket.getSales()` do another query to fetch sales because you explicitly asked it.
@Transactional
public void checkTicketSalePresence(UUID ticketUuid, UUID saleUuid) {
Optional<Ticket> savedTicketOpt = ticketRepository.findById(ticketUuid);
savedTicketOpt.ifPresent(ticket -> {
Optional<Sale> saleOpt = ticket.getSales().stream().filter(sale -> sale.getUuid() == saleUuid).findFirst();
assertThat(saleOpt).isPresent();
});
}
Here, in an Hibernate proxy-managed transaction, the fact of calling `ticket.getSales()` do another query to fetch sales because you explicitly asked it.