> ## Documentation Index
> Fetch the complete documentation index at: https://bun-1dd33a4e-farm-ad2450b3-transpiler-cache-version-namespa.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.
# Use Prisma Postgres with Bun
Prisma needs Node.js to run certain generation code, so make sure Node.js is installed in the environment where you
run `bunx prisma` commands.
First, create a directory and initialize it with `bun init`.
```bash terminal icon="terminal" theme={"theme":{"light":"github-light","dark":"dracula"}}
mkdir prisma-postgres-app
cd prisma-postgres-app
bun init
```
Then install the Prisma CLI (`prisma`), Prisma Client (`@prisma/client`), and the accelerate extension as dependencies.
```bash terminal icon="terminal" theme={"theme":{"light":"github-light","dark":"dracula"}}
bun add -d prisma
bun add @prisma/client @prisma/extension-accelerate
```
Use the Prisma CLI with `bunx` to initialize the schema and migration directory, with PostgreSQL as the database.
```bash terminal icon="terminal" theme={"theme":{"light":"github-light","dark":"dracula"}}
bunx --bun prisma init --db
```
This creates a basic schema. Update it to use the Rust-free client optimized for Bun: open `prisma/schema.prisma` and modify the generator block, then add a `User` model.
```prisma prisma/schema.prisma icon="https://mintcdn.com/bun-1dd33a4e-farm-ad2450b3-transpiler-cache-version-namespa/pVrMBuZvntvIe2NO/icons/ecosystem/prisma.svg?fit=max&auto=format&n=pVrMBuZvntvIe2NO&q=85&s=78344fc1befa44c21130a5cb0e965d8e" theme={"theme":{"light":"github-light","dark":"dracula"}}
generator client {
provider = "prisma-client"
output = "./generated" // [!code ++]
engineType = "client" // [!code ++]
runtime = "bun" // [!code ++]
}
datasource db {
provider = "postgresql"
url = env("DATABASE_URL")
}
model User { // [!code ++]
id Int @id @default(autoincrement()) // [!code ++]
email String @unique // [!code ++]
name String? // [!code ++]
} // [!code ++]
```
Set up your Postgres database URL in the `.env` file.
```ini .env icon="settings" theme={"theme":{"light":"github-light","dark":"dracula"}}
DATABASE_URL="postgresql://username:password@localhost:5432/mydb?schema=public"
```
Then generate and run the initial migration.
The command writes a `.sql` migration file to `prisma/migrations` and executes it against your Postgres database.
```bash terminal icon="terminal" theme={"theme":{"light":"github-light","dark":"dracula"}}
bunx --bun prisma migrate dev --name init
```
```txt theme={"theme":{"light":"github-light","dark":"dracula"}}
Environment variables loaded from .env
Prisma schema loaded from prisma/schema.prisma
Datasource "db": PostgreSQL database "mydb", schema "public" at "localhost:5432"
Applying migration `20250114141233_init`
The following migration(s) have been created and applied from new schema changes:
prisma/migrations/
└─ 20250114141233_init/
└─ migration.sql
Your database is now in sync with your schema.
✔ Generated Prisma Client (6.17.1) to ./generated in 18ms
```
As the output shows, Prisma re-generates the *Prisma client* whenever you run a new migration. The client provides a fully typed API for reading and writing to the database. To re-generate the client manually, use the Prisma CLI.
```sh terminal icon="terminal" theme={"theme":{"light":"github-light","dark":"dracula"}}
bunx --bun prisma generate
```
Create a new file `prisma/db.ts` that initializes the PrismaClient with the Postgres adapter.
```ts prisma/db.ts icon="https://mintcdn.com/bun-1dd33a4e-farm-ad2450b3-transpiler-cache-version-namespa/pVrMBuZvntvIe2NO/icons/typescript.svg?fit=max&auto=format&n=pVrMBuZvntvIe2NO&q=85&s=81fcaf3ac2cead5d758f3588a492f46a" theme={"theme":{"light":"github-light","dark":"dracula"}}
import { PrismaClient } from "./generated/client";
import { withAccelerate } from '@prisma/extension-accelerate'
export const prisma = new PrismaClient().$extends(withAccelerate())
```
Write a script that creates a new user, then counts the users in the database.
```ts index.ts icon="https://mintcdn.com/bun-1dd33a4e-farm-ad2450b3-transpiler-cache-version-namespa/pVrMBuZvntvIe2NO/icons/typescript.svg?fit=max&auto=format&n=pVrMBuZvntvIe2NO&q=85&s=81fcaf3ac2cead5d758f3588a492f46a" theme={"theme":{"light":"github-light","dark":"dracula"}}
import { prisma } from "./prisma/db";
// create a new user
await prisma.user.create({
data: {
name: "John Dough",
email: `john-${Math.random()}@example.com`,
},
});
// count the number of users
const count = await prisma.user.count();
console.log(`There are ${count} users in the database.`);
```
Run the script with `bun run`. Each run creates a new user.
```bash terminal icon="terminal" theme={"theme":{"light":"github-light","dark":"dracula"}}
bun run index.ts
```
```txt theme={"theme":{"light":"github-light","dark":"dracula"}}
There are 1 users in the database.
```
```bash terminal icon="terminal" theme={"theme":{"light":"github-light","dark":"dracula"}}
bun run index.ts
```
```txt theme={"theme":{"light":"github-light","dark":"dracula"}}
There are 2 users in the database.
```
```bash terminal icon="terminal" theme={"theme":{"light":"github-light","dark":"dracula"}}
bun run index.ts
```
```txt theme={"theme":{"light":"github-light","dark":"dracula"}}
There are 3 users in the database.
```
***
Prisma Postgres is now set up with Bun. Refer to the [official Prisma Postgres docs](https://www.prisma.io/docs/postgres) as you continue to develop your application.