在Django中,当出现"FOREIGN KEY constraint failed"错误时,通常是由于外键约束失败引起的。这个错误表示在数据库中插入或更新数据时,违反了外键约束。 外键是用来建立表与表之间关系的一种约束,它确保了数据的完整性和一致性。当我们在Django中定义了一个外键字段,并且尝试插入或更新数据时,Django会自动检查外...
32\lib\site-packages\django-2.1rc1-py3.7.egg\django\core\handlers\exception.py", line34,ininner response = get_response(request) File"C:\Users\Nikita Shuliak\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django-2.1rc1-py3.7.egg\django\core\handlers\base.py", line126,in_get...
'django.middleware.clickjacking.XFrameOptionsMiddleware'] Traceback: File"C:\Users\tymot\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\backends\base\base.py"in _commit239.returnself.connection.commit() The aboveexception(FOREIGN KEY constraint failed) was the direct cause ...
这是因为你在ForeignKey中遗漏了on_delete，这在新的Django版本中是必须的。
“foreign key constraint failed”错误的含义 “foreign key constraint failed”错误是一个数据库错误,表明在尝试插入、更新或删除数据时违反了外键约束。外键约束用于确保数据库中表之间的数据完整性和一致性,通过指定一个表中的字段(外键)必须是另一个表(父表)中某个字段(主键)的合法值。 可能导致“foreign key...
'OPTIONS': { "init_command": "SET foreign_key_checks = 0;", }, to database settings , the error becames: django.db.utils.OperationalError: (1825, "Failed to add the foreign key constraint on table 'levan_liveevent_notify_subscriptions'. Incorrect options in FOREIGN KEY constraint 'slip...
Cannot add or update a child row: a foreign key constraint fails 2019-03-31 21:29 −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 fai 2 ls (`cms`.`app01_book_a... ...
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 constraint fails (`mxonline`.`django_admin_log`, CONSTRAINT `django_admin_log_user_id_c564eba6_fk_auth_user_id` FORE...
That is to drop the foreign key constraint on the child table, run the DDL on both the child and the parent tables, and finally redefine the foreign key constraint. As you can see, the integrity constraint is compromised for the duration for this workaround. Be sure to keep the server ...
tpmentioned this issueMay 18, 2015 AutoMigrate should return an error when it skips newly added FK fields#493 Closed pedromorganadded#schemalabelsOct 26, 2015 jinzhumentioned this issueJan 3, 2016 jinzhuaddedtype:featureand removed#relationlabelsJan 4, 2016 ...