# Repository

`Repository` is just like `EntityManager` but its operations are limited to a concrete entity. You can access the repository via EntityManager.

Example:

```
import { User } from "./entity/User"



const userRepository = dataSource.getRepository(User)

const user = await userRepository.findOneBy({

    id: 1,

})

user.name = "Umed"

await userRepository.save(user)
```

There are 3 types of repositories:

* `Repository` - Regular repository for any entity.
* `TreeRepository` - Repository, extensions of `Repository` used for tree-entities (like entities marked with `@Tree` decorator). Has special methods to work with tree structures.
* `MongoRepository` - Repository with special functions used only with MongoDB.