我有一個 spring 啟動程式，現在我的 PutMapping 功能似乎沒有按預期作業。現在，如果我在郵遞員中更新該欄位，它會顯示沒有錯誤，但是當我檢查更新是否發生時，則沒有任何更改。
控制器：
@PutMapping(path = "{bookingId}")
public void updateBooking (
@PathVariable("bookingId") Long bookingId,
@RequestParam(required = false) Integer tickets ) {
bookingService.updateBooking(bookingId, tickets);
}
服務：
public void updateBooking(Long bookingId, Integer tickets) {
// checks if event id exists
Booking booking = bookingRepository.findById(bookingId).orElseThrow(() -> new IllegalStateException(
"Booking with id " bookingId " does not exists. "));
if (tickets != null && !Objects.equals(booking.getTickets(), tickets)) {
booking.setTickets(tickets);
booking.setAmount(booking.getAmount());
}
else {
throw new IllegalStateException(
"The update was unsuccessful" );
}
}
模型：
public Integer getTickets() {
return tickets;
}
public void setTickets(Integer tickets) {
this.tickets = tickets;
}
uj5u.com熱心網友回復：
您沒有在資料庫中保存更新的物件。
public void updateBooking(Long bookingId, Integer tickets) {
// checks if event id exists
Booking booking = bookingRepository.findById(bookingId).orElseThrow(() -> new IllegalStateException(
"Booking with id " bookingId " does not exists. "));
if (tickets != null && !Objects.equals(booking.getTickets(), tickets)) {
booking.setTickets(tickets);
booking.setAmount(booking.getAmount());
// save the updated booking in the database
bookingRepository.save(booking)
}
else {
throw new IllegalStateException(
"The update was unsuccessful" );
}
}
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