sqlite3.IntegrityError: FOREIGN KEY constraint failed 错误的含义 sqlite3.IntegrityError: FOREIGN KEY constraint failed 错误表明在执行数据库操作时,违反了SQLite数据库中定义的外键约束。外键约束用于确保一个表中的数据与另一个表中的数据保持一致性和完整性。当尝试插入或更新数据时,如果违反了外键约束(例如,尝试...
SQLite Error 19: 'FOREIGN KEY constraint failed'. exception is thrown in case of foreign key constraint is configured in base class's EntityTypeConfiguration · Issue #34761 · dotnet/efcore
sqlite外键约束中。restrict约束:如果要删除父表,则子表需空。 如果没有定义约束。会报错,需设置一个约束。
type User struct { //Main columns UserId uint `gorm:"primaryKey;autoIncrement" json:"userId"` UserFirstName string `gorm:"not null;default:NULL" json:"userFirstName"` UserLastName string `gorm:"not null;default:NULL" json:"userLastName"` UserUsername string `gorm:"not null;default:NULL...
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。
sqlite> INSERT INTO track VALUES(14, 'Mr. Bojangles', 3); SQL error: foreign key constraint failed //track表中trackartist=3有问题,track(trackartist) 关联artist(artistid),artistid只有俩条数据 //(artistid=1和artistid=2) ,应该首先给artist 插入一条artistid=3的数据就没问题了.如下 ...
PRAGMA foreign_keys=ON;/*Error: near line 13: FOREIGN KEY constraint failed 要能成功删掉,tom就不再是人了。*/DELETEFROMpersonWHEREname='tom';--rm -f t.db; sqlite3 t.db <t.sql 不是primary key可以当foreign key; 可以同时是primary和foreign key ...
Rails迁移被"foreign key constraint failed"阻塞,意味着在数据库中存在外键约束导致迁移无法完成。当尝试修改数据库表结构时,如果该表的外键约束引用了其他表中不存在的键,或者有关联的数据存在时,数据库会拒绝进行迁移操作并报错"foreign key constraint failed"。
PostgreSQL 9.4 does not create the index on the child table and correctly enforces the constraint. The same is true for SQLite3. fktest=# create table t1 (id int not null primary key, name varchar(100) not null); CREATE TABLE fktest=# create table t2 (id int not null primary key,...
{ "errors": [ { "message": "DROP TABLE \"C2\" - SQLITE_CONSTRAINT: FOREIGN KEY constraint failed", "extensions": { "code": "INTERNAL_SERVER_ERROR" } } ] } What version of Directus are you using? 9.4.2 What version of Node.js are you using? 16.13.1 What database are you ...