删除之前触发不触发 - MySQL

Question

以下是我在尝试从“收藏夹”中删除记录之前尝试编写的触发器。表，基本上检查是否a）我想删除的景点甚至在数据库中表示，b）如果吸引力甚至被用户所喜爱，则最喜欢的是。问题是，由于某种原因，触发器似乎没有被触发（我试图看看它是否在＆＃39;插入评论＆＃39;部分）。有谁看到了原因？

DELIMITER //
CREATE TRIGGER checkFavoritesBeforeDeleting 
BEFORE DELETE 
ON favorites
FOR EACH ROW

BEGIN
DECLARE attExists INT;
DECLARE attNotFavorited INT;

-- insert into review values (5, 1, 'tester');

SELECT count(*) into attExists from attraction where attraction_id = old.attraction_id;
SELECT count(*) into attNotFavorited from favorites where account_id = 
    old.account_id and attraction_id = old.attraction_id;

IF attExists = 0 OR attExists IS NULL then 
    signal sqlstate '45000' set message_text = 'Sorry, but the attraction you wanted to delete does not exist in our database.';
ELSEIF attNotFavorited < 1 then
    signal sqlstate '45000' set message_text = 'Sorry, but the favorited attraction you wanted to delete was not even in your list of favorites!';
END IF;
END //
DELIMITER ;