问题描述
我正在开发带有续集的Expressjs应用程序。我想了解一些用续集处理交易的事情
以下是两种情况。
场景1
所有都是选择查询。即使没有插入/更新/删除操作,如果在这里使用事务处理也会有什么影响?
public async Process() {
const _transaction = await sequelize.transaction();
try {
const person = await sequelize.query({
query: <Select query>,},{
type: sqlConnection.QueryTypes.SELECT,transaction: _transaction
});
const department = await sequelize.query({
query: <Select query>,transaction: _transaction
});
// ....other operations
await transaction.commit();
} catch (error) {
if (transaction) {
await transaction.rollback();
}
throw error;
}
}
场景2
public async Process() {
const _transaction = await sequelize.transaction();
try {
const person = await sequelize.query({
query: <Select query>,transaction: _transaction
});
const department = await sequelize.query({
query: <Insert query>,{
type: sqlConnection.QueryTypes.INSERT,transaction: _transaction
});
const value = await sequelize.query({
query: <Insert query>,transaction: _transaction
});
// No transaction
const result = await sequelize.query({
query: <Select query>,{
type: sqlConnection.QueryTypes.SELECT
});
await transaction.commit();
} catch (error) {
if (transaction) {
await transaction.rollback();
}
throw error;
}
}
解决方法
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