# @eggjs/tegg-transaction-decorator

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[![Known Vulnerabilities][snyk-image]][snyk-url]
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[npm-url]: https://npmjs.org/package/@eggjs/tegg-transaction-decorator
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[download-url]: https://npmjs.org/package/@eggjs/tegg-transaction-decorator

事务注解

## Usage

### 传播机制

```ts
export class Foo {
  @Transactional({ propagation: PropagationType.ALWAYS_NEW })
  async bar() {
    await this.foo();
  }

  @Transactional({ propagation: PropagationType.REQUIRED })
  async foo(msg) {
    console.log('has msg: ', msg);
  }
}
```

### 数据源

```ts
export class Bar {
  @Transactional({ dataSourceName: 'xx' })
  async bar() {
    await this.foo();
  }
}
```

Foo.bar 始终会在一个独立的事务中执行，而 Foo.foo 会在 Foo.bar 的事务中执行