CachePut如何获取返回值的Id？

Question

@CachePut(value = "dishDTOs", key = "IDOFTHERETURNEDVALUE")
@CacheEvict(cacheNames = "dishDTOList", allEntries = true)
public DishResponseDTO createDish(DishCreationDTO dishCreationDTO) {
    int restaurantId = dishCreationDTO.getRestaurantId();
    var restaurant = restaurantRepository.getById(restaurantId);

    var dish = DishMapper.toDish(dishCreationDTO, restaurant);
    return toDishResponseDTO(dishRepository.save(dish));
}

Id 是由 DB 分配的，所以我需要以某种方式获取它作为键。

Answer 1

SpeL 可以使用 #result 访问返回的对象，您可以使用 . 和字段名称访问对象参数。例如

@CachePut(value = "dishDTOs", key = "#result.id)
@CacheEvict(cacheNames = "dishDTOList", allEntries = true)
public DishResponseDTO createDish(DishCreationDTO dishCreationDTO) {
    int restaurantId = dishCreationDTO.getRestaurantId();
    var restaurant = restaurantRepository.getById(restaurantId);

    var dish = DishMapper.toDish(dishCreationDTO, restaurant);
    return toDishResponseDTO(dishRepository.save(dish));
}

将 .id 更改为您的 DishResponseDTO 字段名称。

CachePut如何获取返回值的Id？

CachePut how to get and Id of returned value?

java

spring

caching