---
title: Backend Commands
icon: TbTerminal
image: /images/user-guide/kanban-views/kanban.png
---

## Useful commands

These commands should be executed from packages/twenty-server folder.
From any other folder you can run `npx nx <command> twenty-server` (or `npx nx run twenty-server:<command>`).

### First time setup

```
npx nx database:reset twenty-server # setup the database with dev seeds
```

### Starting the server

```
npx nx run twenty-server:start
```

### Lint

```
npx nx run twenty-server:lint # pass --fix to fix lint errors
```

### Test

```
npx nx run twenty-server:test:unit          # run unit tests
npx nx run twenty-server:test:integration   # run integration tests
```
Note : you can run `npx nx run twenty-server:test:integration:with-db-reset` in case you need to reset the database before running the integration tests.

### Resetting the database

If you want to reset and seed the database, you can run the following command:

```bash
npx nx run twenty-server:database:reset
```

### Migrations

#### For objects in Core/Metadata schemas (TypeORM)

```bash
npx nx run twenty-server:typeorm --migration:generate src/database/typeorm/metadata/migrations/nameOfYourMigration -d src/database/typeorm/metadata/metadata.datasource.ts # replace by core data source if necessary
```

#### For Workspace objects

There are no migrations files, migration are generated automatically for each workspace,
stored in the database, and applied with this command

```bash
npx nx run twenty-server:command workspace:sync-metadata -f
```

<ArticleWarning>

This will drop the database and re-run the migrations and seed.

Make sure to back up any data you want to keep before running this command.

</ArticleWarning>

## Tech Stack

Twenty primarily uses NestJS for the backend. 

Prisma was the first ORM we used. But in order to allow users to create custom fields and custom objects, a lower-level made more sense as we need to have fine-grained control. The project now uses TypeORM. 

Here's what the tech stack now looks like. 


**Core**
- [NestJS](https://nestjs.com/)
- [TypeORM](https://typeorm.io/)
- [GraphQL Yoga](https://the-guild.dev/graphql/yoga-server)

**Database**
- [Postgres](https://www.postgresql.org/)

**Third-party integrations**
- [Sentry](https://sentry.io/welcome/) for tracking bugs

**Testing**
- [Jest](https://jestjs.io/)

**Tooling**
- [Yarn](https://yarnpkg.com/)
- [ESLint](https://eslint.org/)

**Development**
- [AWS EKS](https://aws.amazon.com/eks/) 

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