CachePut如何获取返回值和返回值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将其作为键放入。

Answer 1

带#result的SpeL可以访问返回的对象，您可以使用.和字段名来访问对象参数。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));
}

使用您的DishResponseDTO字段名更改.id。