## Example app using Knex

[Knex](https://knexjs.org/) is a SQL query builder that works with a variety of SQL databases including Postgres and MySQL. This example shows you how to use Knex with Next.js to connect and query a Postgres database. The same code can also connect to all other databases supported by Knex.

## Deploy your own

[![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/clone?repository-url=https://github.com/vercel/next.js/tree/canary/examples/with-knex&project-name=with-knex&repository-name=with-knex&env=PG_URI&envDescription=Required%20to%20connect%20the%20app%20with%20Postgres)

## How to use

Execute [`create-next-app`](https://github.com/vercel/next.js/tree/canary/packages/create-next-app) with [npm](https://docs.npmjs.com/cli/init), [Yarn](https://yarnpkg.com/lang/en/docs/cli/create/), or [pnpm](https://pnpm.io) to bootstrap the example:

```bash
npx create-next-app --example with-knex with-knex-app
```

```bash
yarn create next-app --example with-knex with-knex-app
```

```bash
pnpm create next-app --example with-knex with-knex-app
```

## Configuration

### Install dependencies

```bash
npm install
# or
yarn
# or
pnpm install
```

### Set up a Postgres database

Set up a Postgres database locally or use a DBaaS provider such as AWS or Digital Ocean

### Configure environment variables

Copy the `.env.local.example` file in this directory to `.env.local` (this will be ignored by Git):

```bash
cp .env.local.example .env.local
```

Set the `PG_URI` variable in `.env.local` to the connection uri of your postgres database.

### Apply migrations

You can create, apply and rollback migrations using the scripts in `package.json`. For now we will run the example migrations in the `knex/migrations` folder, which will add some Todos to the database.

```bash
npm run migrate:latest
# or
yarn migrate:latest
# or
pnpm migrate:latest
```

### Start Next.js in development mode

```bash
npm run dev
# or
yarn dev
# or
pnpm dev
```

Your app should now be up and running on [http://localhost:3000](http://localhost:3000)! If it doesn't work, post on [GitHub discussions](https://github.com/vercel/next.js/discussions).

You should now see a list of Todos that were fetched from the database via the API Route defined in `/pages/api/todos.js`.

## Deploy on Vercel

You can deploy this app to the cloud with [Vercel](https://vercel.com?utm_source=github&utm_medium=readme&utm_campaign=next-example) ([Documentation](https://nextjs.org/docs/deployment)).

#### Deploy Your Local Project

To deploy your local project to Vercel, push it to GitHub/GitLab/Bitbucket and [import to Vercel](https://vercel.com/new?utm_source=github&utm_medium=readme&utm_campaign=next-example).

**Important**: When you import your project on Vercel, make sure to click on **Environment Variables** and set them to match your `.env.local` file.

#### Deploy from Our Template

Alternatively, you can deploy using our template by clicking on the Deploy button below.

[![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/clone?repository-url=https://github.com/vercel/next.js/tree/canary/examples/with-knex&project-name=with-knex&repository-name=with-knex&env=PG_URI&envDescription=Required%20to%20connect%20the%20app%20with%20Knex)