# Use Prisma with Bun

<Note>
  Prisma's dynamically loaded subcommands, such as `prisma dev`, require npm to be installed alongside Bun. The commands
  used in this guide (`prisma init`, `prisma migrate`, and `prisma generate`) are built into the CLI. Generated code
  works with Bun using the `prisma-client` generator.
</Note>

<Steps>
	<Step title="Create a new project">
		Create a directory and initialize it with `bun init`.

    	```bash terminal icon="terminal"
    	mkdir prisma-app
    	cd prisma-app
    	bun init
    	```
    </Step>

    <Step title="Install Prisma dependencies">
    	Then install the Prisma CLI (`prisma`), Prisma Client (`@prisma/client`), and the LibSQL adapter as dependencies.

    	```bash terminal icon="terminal"
    	bun add -d prisma
    	bun add @prisma/client @prisma/adapter-libsql
    	```
    </Step>

    <Step title="Initialize Prisma with SQLite">
    	Use the Prisma CLI with `bunx` to initialize the schema and migration directory. This guide uses a local SQLite database file. `prisma init` writes its connection string, `DATABASE_URL="file:./dev.db"`, to `.env`.

    	```bash terminal icon="terminal"
    	bunx --bun prisma init --datasource-provider sqlite
    	```

    	This creates a basic schema. Open `prisma/schema.prisma`, update the generator block to use the Rust-free client with the `bun` runtime, and add a `User` model.

    	```prisma prisma/schema.prisma icon="/icons/ecosystem/prisma.svg"
    	  generator client {
    	    provider = "prisma-client"
    	    output = "../generated/prisma" // [!code --]
    	    output = "./generated" // [!code ++]
    	    engineType = "client" // [!code ++]
    	    runtime = "bun" // [!code ++]
    	  }

    	  datasource db {
    	    provider = "sqlite"
    	  }

    	  model User { // [!code ++]
    	    id    Int     @id @default(autoincrement()) // [!code ++]
    	    email String  @unique // [!code ++]
    	    name  String? // [!code ++]
    	  } // [!code ++]
    	```
    </Step>

    <Step title="Create and run database migration">
    	Generate and run the initial migration. The command writes a `.sql` migration file to `prisma/migrations`, creates a new SQLite database, and runs the migration against it. Bun [does not load `.env` automatically](/runtime/environment-variables) when it runs a CLI with `--bun`. The `prisma.config.ts` generated by `prisma init` reads `DATABASE_URL` from the environment, so pass `--env-file=.env` explicitly.

    	```bash terminal icon="terminal"
    	 bun run --bun --env-file=.env prisma migrate dev --name init
    	 ```
    	 ```txt
    	Loaded Prisma config from prisma.config.ts.

    	Prisma schema loaded from prisma/schema.prisma.
    	Datasource "db": SQLite database "dev.db" at "file:./dev.db"

    	SQLite database dev.db created at file:./dev.db

    	Applying migration `20251014141233_init`

    	The following migration(s) have been created and applied from new schema changes:

    	prisma/migrations/
    	  └─ 20251014141233_init/
    	    └─ migration.sql

    	Your database is now in sync with your schema.
    	```
    </Step>

    <Step title="Generate Prisma Client">
    	`prisma migrate dev` does not generate the _Prisma client_, so generate it with the Prisma CLI. The client provides a fully typed API for reading and writing to your database.

    	```sh terminal icon="terminal"
    	bun run --bun --env-file=.env prisma generate
    	```
    </Step>

    <Step title="Initialize Prisma Client with LibSQL">
    	Create a new file `prisma/db.ts` that initializes the PrismaClient with the LibSQL adapter.

    	```ts prisma/db.ts icon="/icons/typescript.svg"
    	import { PrismaClient } from "./generated/client";
    	import { PrismaLibSql } from "@prisma/adapter-libsql";

    	const adapter = new PrismaLibSql({ url: process.env.DATABASE_URL || "" });
    	export const prisma = new PrismaClient({ adapter });
    	```
    </Step>

    <Step title="Create a test script">
    	Write a script that creates a new user, then counts the users in the database.

    	```ts index.ts icon="/icons/typescript.svg"
    	import { prisma } from "./prisma/db";

    	// create a new user
    	await prisma.user.create({
    	  data: {
    	    name: "John Dough",
    	    email: `john-${Math.random()}@example.com`,
    	  },
    	});

    	// count the number of users
    	const count = await prisma.user.count();
    	console.log(`There are ${count} users in the database.`);
    	```
    </Step>

    <Step title="Run and test the application">
    	Run the script with `bun run`. Each run creates a new user.

    	```bash terminal icon="terminal"
    	bun run index.ts
    	```
    	```txt
    	There are 1 users in the database.
    	```

    	```bash terminal icon="terminal"
    	bun run index.ts
    	```
    	```txt
    	There are 2 users in the database.
    	```

    	```bash terminal icon="terminal"
    	bun run index.ts
    	```
    	```txt
    	There are 3 users in the database.
    	```
    </Step>

</Steps>

---

Prisma is now set up with Bun. See the [Prisma docs](https://www.prisma.io/docs/orm/prisma-client) as you build out your application.