[err] 1452 - cannot add or update a child row: a foreign key constraint fail

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1452, 'Cannot add or update a child row: a foreign key constraint fails

https://my.oschina.net/u/4356012/blog/3443566

(1452, 'Cannot add or update a child row: a foreign key constraint fails (., CONSTRAINT FOREIGN KEY () REFERENCES ())')   这时候需要在setting文件的databases中添加以下代码取消外...

2019/08/01 00:00

Cannot add or update a child row: a foreign key constraint fails

https://my.oschina.net/u/4263502/blog/3591152

在使用Django添加用户时出现报错: 1 django.db.utils.IntegrityError: (1452, 'Cannot add or update a child row: a foreign key constraint fai2 ls (., CONSTRAINT FOREIG3 N KEY () REF...

0001/03/31 00:00

Mysql错误1452 - Cannot add or update a child row: a foreign key constraint fails 原因及解决方法

https://my.oschina.net/u/4438370/blog/4909886

Mysql错误1452 - Cannot add or update a child row: a foreign key constraint fails 原因及解决方法 参考文章: (1)Mysql错误1452 - Cannot add or update a child row: a foreign key ...

01/18 00:00

MySQL设置外键报错 #1452 - Cannot add or update a child row: a foreign key constraint fails 解决方法

https://my.oschina.net/u/4362549/blog/4122578

  MySQL数据库,当我尝试在A表中设置B表的主键为外键时,报出错误:#1452 - Cannot add or update a child row: a foreign key constraint fails      于是去搜索了一下 "#1452 - Can...

2020/03/21 00:00

admin添加用户时报错:(1452, 'Cannot add or update a child row: a foreign key constraint fails (`mxonl...

https://my.oschina.net/u/4397893/blog/4089308

在stackoverflow找到答案: DATABASES = {'default': { }} (According to the official doc) In previous versions of Django, fixtures with forward references (i.e. relations to rows ...

2019/04/19 00:00

数据库添加数据报错:Cannot add or update a child row: a foreign key constraint fails

https://my.oschina.net/u/4374409/blog/3563519

  在更新表数据时出现了以下报错信息:Cannot add or update a child row: a foreign key constraint fails (., CONSTRAINT FOREIGN KEY () REFERENCES ())   也就是说tbshop表中的涉及到...

2019/04/22 00:00

关于:cannot add or update a child row a foreign k...

https://my.oschina.net/u/814277/blog/85474

问题描述: cannot add or update a child row a foreign key constraint fails... 原因: 说白了就是:有A,B两张表,A的主键是B的一个外键,在向B插入一条新记录时,在A表中找不到这条新纪录...

2012/10/27 00:00

Mysql 主外键报错:Error 'Cannot add or update a child row: a foreign key constraint fails

https://my.oschina.net/u/4314965/blog/4243784

#参考博客:http://blog.csdn.net/garcon1986/article/details/5337336 1、报错:Error 'Cannot add or update a child row: a foreign key constraint fails (., CONSTRAINT FOREIGN KEY ()...

2018/02/27 00:00

解决ORM错误:django.db.utils.IntegrityError: (1452, 'Cannot add or update a child row: a foreign k...

https://my.oschina.net/u/4357584/blog/3345779

# 修改settings.pyDATABASES = { } # 添加以下代码,取消外键检查

2019/11/17 00:00

go-xorm使用外键报错(Cannot add or update a child row: a foreign key constraint fails)

https://my.oschina.net/u/3703365/blog/1817543

问题描述 使用mysql会经常遇到要使用外键的场景,go-xorm 作为一个orm的框架,在数据映射上使用非常方便,但在增添数据是经常碰到报错: Cannot add or update a child row: a foreign key c...

2018/05/23 00:00

java.sql.SQLIntegrityConstraintViolationException: Cannot add or update a child row: a foreign ke...

https://my.oschina.net/u/4359745/blog/3424624

HTTP Status 500 - Request processing failed; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statementtype Exception report message R...

2019/08/20 00:00

Mysql数据库报错:Cannot add or update a child row: a foreign key constraint fails(添加多对多关系)

https://my.oschina.net/u/4358980/blog/3632560

#创建班级表class Classes(models.Model): 创建老师表 class Teachers(models.Model): 创建学生表 class Student(models.Model): 只能写true和false    现在我想要在第三张关系表中添加数据...

2019/02/28 00:00

IntegrityError at /admin/users/userprofile/add/ (1452, 'Cannot add or update a child row: a ...

https://my.oschina.net/u/4317309/blog/3614227

报错现象 在执行 django 后台管理的时候添加数据导致 1452 错误 报错代码 IntegrityError at /admin/users/userprofile/add/ (1452, 'Cannot add or update a child row: a foreign key cons...

2019/03/14 00:00

1215 - Cannot add foreign key constraint

https://my.oschina.net/u/2763509/blog/1822067

产生:做主外键关联的时候出现的 原因:主要有三个原因: (1)外键对应的字段数据类型不一致 (2)设置外键时“删除时”设置为“SET NULL” (3)两张表的存储引擎不一致 解决办法:详情见参...

2018/05/31 00:00

1215 - Cannot add foreign key constraint

https://my.oschina.net/u/3866531/blog/2209684

参考网页 https://blog.csdn.net/yiwangxiblog/article/details/52269527 https://blog.csdn.net/ytm15732625529/article/details/53729155 原因--亲测 两张表的存储引擎不一致。主键所在表和...

2018/09/27 00:00

MySQL错误号1451-Cannot delete or update a parent row: a foreign key constraint fails

https://my.oschina.net/u/1045118/blog/718494

在SQLyog中删除一张表时候,出现 Error No. 1451Cannot delete or update a parent row: a foreign key constraint fails Cannot delete or update a parent row: a foreign key constraint ...

2016/07/26 00:00

Django 迁移错误 Cannot add foreign key constraint

https://my.oschina.net/u/4335884/blog/3367993

错误分析 更换数据库后 字符集错误 就是原来的库和新的库在外键的字符集上不一样 如图: 解决方案: 1.迁移先需要失败一次(既然出现了这个错误,说明已经迁移了一次) 2.修改当前表外键字段...

2019/10/19 00:00

Mysql - 删除表时出现: Cannot delete or update a parent row: a foreign key constraint fails

https://my.oschina.net/u/4283151/blog/4122984

现象 MySQL在删除一张表时出现 ERROR 1217 (23000): Cannot delete or update a parent row: a foreign key constraint fails 原因 可能是在Mysql中,删除的表和另一张表设置了foreign key的...

2020/03/27 00:00

Mysql - 删除表时出现: Cannot delete or update a parent row: a foreign key constraint fails

https://my.oschina.net/u/4840086/blog/4736195

MySQL在删除一张表时出现 ERROR 1217 (23000): Cannot delete or update a parent row: a foreign key constraint fails 原因 可能是在Mysql中,删除的表和另一张表设置了foreign key的关联,...

2020/03/27 00:00

a foreign key constraint fails

https://my.oschina.net/u/4366825/blog/3575449

可能由两种原因导致: 1、设置的外键和对应的另一个表的主键值不匹配。 解决方法: 找出不匹配的值修改。 或者清空两表数据。 2、字符集和排序规则的差异引起 如果确认外键和主键一致,使用如...

2019/04/13 00:00
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