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Home Backend Development PHP Tutorial 关于数据库事物和外键

关于数据库事物和外键

Jun 06, 2016 pm 08:17 PM
mariadb mysql php sql

情况是这样的:

表A
id int(11)

表B
a_id int(11)

表B的a_id是表A主键的外键

----------- 万恶的分割线 ------------

我开启了mysql的事物,然后某个操作需要先插入一条数据到表A(以下简称操作一),再插入数据到表B(以下简称操作二)。

操作二依赖操作一插入成功后返回的ID

在开启了事物的情况下,操作一成功之后,往表B插入数据,这时候会检测外键,虽然操作一成功了,但是由于事物还没有提交,所以表A里还没有那条数据,所以操作二会报错。。。

大家是怎么解决这个问题的(我目前的解决办法是取消外键索引!!!)?

回复内容:

情况是这样的:

表A
id int(11)

表B
a_id int(11)

表B的a_id是表A主键的外键

----------- 万恶的分割线 ------------

我开启了mysql的事物,然后某个操作需要先插入一条数据到表A(以下简称操作一),再插入数据到表B(以下简称操作二)。

操作二依赖操作一插入成功后返回的ID

在开启了事物的情况下,操作一成功之后,往表B插入数据,这时候会检测外键,虽然操作一成功了,但是由于事物还没有提交,所以表A里还没有那条数据,所以操作二会报错。。。

大家是怎么解决这个问题的(我目前的解决办法是取消外键索引!!!)?

我试了下。操作二不会报错。你再找找别的原因吧

2个操作分别开启2个事务即可。

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