bun.sh/docs/guides/ecosystem/prisma.md

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Get started using Prisma

Prisma works out of the box with Bun. First, create a directory and initialize it with bun init.

mkdir prisma-app
cd prisma-app
bun init

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Then add Prisma as a dependency.

bun add prisma

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We'll use the Prisma CLI with bunx to initialize our schema and migration directory. For simplicity we'll be using an in-memory SQLite database.

bunx prisma init --datasource-provider sqlite

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Open prisma/schema.prisma and add a simple User model.

  generator client {
    provider = "prisma-client-js"
  }

  datasource db {
    provider = "sqlite"
    url      = env("DATABASE_URL")
  }

+ model User {
+   id    Int     @id @default(autoincrement())
+   email String  @unique
+   name  String?
+ }

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Then generate and run initial migration.

This will generate a .sql migration file in prisma/migrations, create a new SQLite instance, and execute the migration against the new instance.

bunx prisma migrate dev --name init

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Prisma automatically generates our Prisma client whenever we execute a new migration. The client provides a fully typed API for reading and writing from our database.

It can be imported from @prisma/client.

import {PrismaClient} from "@prisma/client";

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Let's write a simple script to create a new user, then count the number of users in the database.

import { PrismaClient } from "@prisma/client";

const prisma = new PrismaClient();

// 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.`);

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Let's run this script with bun run. Each time we run it, a new user is created.

$ bun run index.ts
Created john-0.12802932895402364@example.com
There are 1 users in the database.
$ bun run index.ts
Created john-0.8671308799782803@example.com
There are 2 users in the database.
$ bun run index.ts
Created john-0.4465968383115295@example.com
There are 3 users in the database.

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That's it! Now that you've set up Prisma using Bun, we recommend referring to the official Prisma docs as you continue to develop your application.