@loopback/docs/site/apidocs/repository.defaulttransactionalrepository.begintransaction.md

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---
lang: en
title: 'API docs: repository.defaulttransactionalrepository.begintransaction'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
sidebar: lb4_sidebar
editurl: https://github.com/loopbackio/loopback-next/tree/master/packages/repository
permalink: /doc/en/lb4/apidocs.repository.defaulttransactionalrepository.begintransaction.html
---

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[Home](./index.md) &gt; [@loopback/repository](./repository.md) &gt; [DefaultTransactionalRepository](./repository.defaulttransactionalrepository.md) &gt; [beginTransaction](./repository.defaulttransactionalrepository.begintransaction.md)

## DefaultTransactionalRepository.beginTransaction() method

**Signature:**

```typescript
beginTransaction(options?: IsolationLevel | Options): Promise<Transaction>;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  options | [IsolationLevel](./repository.isolationlevel.md) \| [Options](./repository.options.md) | _(Optional)_ |

**Returns:**

Promise&lt;[Transaction](./repository.transaction.md)<!-- -->&gt;