以下是PostgreSQL中数据库表和约束的快照:
CREATE TABLE garage (
garage_id integer NOT NULL,
garage_name text,
garage_description text
);
CREATE TABLE auto (
auto_id serial PRIMARY KEY,
auto_name text,
auto_description text,
auto_price numeric(20,2),
auto_category text,
garage_id integer
);
ALTER TABLE ONLY auto
ADD CONSTRAINT auto_garage_id_fkey FOREIGN KEY (gerage_id)
REFERENCES gerage(gerage_id);
这里我使用Sequelize:
在nodejs中定义数据库对象var Auto = sequelize.define('auto', {
auto_id: {
type: Sequelize.INTEGER,
primaryKey: true,
autoIncrement: true
},
auto_name: Sequelize.STRING,
auto_description: Sequelize.STRING,
auto_price: Sequelize.NUMERIC,
auto_category: Sequelize.STRING,
garage_id: Sequelize.INTEGER
}, {freezeTableName: true,
tableName: "auto",
timestamps: false,
paranoid: false,
underscored: true});
function createAutos(auto_1,auto_2){
return sequelize.transaction().then(function(t){
return Auto.create(auto_1,
{fields: ['auto_name', 'auto_description', 'auto_price', 'auto_category', 'garage_id']},
{transaction: t}
).then(function(){
return Auto.create(auto_2,
{fields: ['auto_name', 'auto_description', 'auto_price', 'auto_category', 'garage_id']},
{transaction: t});
}).then(function(){
t.commit();
}).catch(function(err){
t.rollback();
});
});
}
这里我正在执行以下方法来测试事务性createAutos():
createAutos({
"auto_name": 'bmw',
"auto_description": 'sport',
"auto_price":4.95,
"auto_category": 'luxes',
"garage_id": 1 // Exists in the database
},{
"auto_name": 'SSSS',
"auto_description": 'sport',
"auto_price":4.95,
"auto_category": 'luxes',
"garage_id": 200 // Doesn't exist in the database.
});
执行时,我可以在控制台上看到以下输出日志:
Executing (bf8cb998-657b-49b7-b29e-957bcf770b40): START TRANSACTION;
Executing (bf8cb998-657b-49b7-b29e-957bcf770b40): SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;
Executing (bf8cb998-657b-49b7-b29e-957bcf770b40): SET autocommit = 1;
Executing (default): INSERT INTO "auto" ("auto_name","auto_description","auto_price","auto_category","garage_id") VALUES ('bmw','sport',4.95,'luxes',1) RETURNING *;
Executing (default): INSERT INTO "auto" ("auto_name","auto_description","auto_price","auto_category","garage_id") VALUES ('SSSS','sport',4.95,'luxes',200) RETURNING *;
Executing (bf8cb998-657b-49b7-b29e-957bcf770b40): ROLLBACK;
但是在数据库中,尽管整个事务的ROLLBACK,第一个自动“bmw”仍然被写入。
我使用PostgreSQL 9.3.10,Ubuntu,MySQL 5.5.46,sequelize 3.13.0& amp; 3.0.0
有没有人注意到代码中的错误或者它是一个错误......?
答案 0 :(得分:0)
在输出日志中,我们可以看到两个事务,一个是bf8cb998-657b-49b7-b29e-957bcf770b40,另一个是Default。第一个是回滚的,第二个不回滚,而且是你插入的地方。
您尝试将事务传递给Create函数,但看起来Sequelize并没有得到它。在一些版本发布之前,交易的语法已经改变,你可以尝试进行交易:t'属性在第二个对象而不是第三个?像这样:
Auto.create(auto_1,
{fields: ['auto_name', 'auto_description', 'auto_price', 'auto_category', 'garage_id'],
transaction: t}