CachePut如何获取返回值和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 由数据库分配，因此我需要以某种方式将其作为键。

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));
}

用您的 DishResponseDTO 字段名称更改 .id。