Cannot add or update a child row 数据库错误
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异常处理:
错误代码:1452
Cannot add or update a child row: a foreign key constraint fails (`1go`.`#sql-16ec_1f`, CONSTRAINT `fk_999` FOREIGN KEY (`goods_id`) REFERENCES `goods` (`id`) ON DELETE CASCADE ON UPDATE CASCADE)
错误原因:数据库中存在着外键约束,可能在实体类中某一个属性添加时,没有外键主体的属性值,看下自己的代码,有没有设置值错误的
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