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...
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。
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 设为primary key则数据库自动为它创建index pri...
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
A foreign key constraint that's classified as deferred (see SQLite docs here) breaks the transaction state. Example program: package main import ( "database/sql" "fmt" _ "github.com/mattn/go-sqlite3" ) func main() { db, _ := sql.Open("sqlite3", "file::memory:") db.Exec(`PRAGMA...
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,...
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 ...
FOREIGN KEY (CustomerID) REFERENCES Customers(CustomerID) ); 这段代码在创建Orders表的同时,定义了CustomerID作为外键,引用Customers表中的CustomerID。也可以使用ALTER TABLE语句为已有表添加外键: ALTER TABLE Orders ADD CONSTRAINT fk_customer FOREIGN KEY (CustomerID) REFERENCES Customers(CustomerID); ...
{ "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 ...