# What is 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)

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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.