随笔分类 -  mysql

change column to bigint
摘要：今天存储数据的时候报错，发现是3435065640超出了常规int的存储长度， RangeError (3435065640 is out of range for ActiveRecord::Type::Integer with limit 4) http://dev.mysql.com/doc/ 阅读全文
posted @ 2016-05-24 16:56 冰凌花花～ 阅读(464) 评论(0) 推荐(0)
关联表级联删除
摘要：Mysql2::Error: Cannot delete or update a parent row: a foreign key constraint fails (`todo_list_development`.`todo_items`, CONSTRAINT `fk_rails_d913ce 阅读全文
posted @ 2016-04-19 09:51 冰凌花花～ 阅读(160) 评论(0) 推荐(0)