jarle/Bun Use Drizzle ORM with Bun

Use Drizzle ORM with Bun

Drizzle is an ORM that supports both a SQL-like "query builder" API and an ORM-like Queries API. It supports the bun:sqlite built-in module.

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Let's get started by creating a fresh project with bun init and installing Drizzle.

bun init -y
bun add drizzle-orm
bun add -D drizzle-kit

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Then we'll connect to a SQLite database using the bun:sqlite module and create the Drizzle database instance.

import { drizzle } from "drizzle-orm/bun-sqlite";
import { Database } from "bun:sqlite";

const sqlite = new Database("sqlite.db");
export const db = drizzle(sqlite);

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To see the database in action, add these lines to index.ts.

import { db } from "./db";
import { sql } from "drizzle-orm";

const query = sql`select "hello world" as text`;
const result = db.get<{ text: string }>(query);
console.log(result);

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Then run index.ts with Bun. Bun will automatically create sqlite.db and execute the query.

bun run index.ts

{
  text: "hello world"
}

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Lets give our database a proper schema. Create a schema.ts file and define a movies table.

import { sqliteTable, text, integer } from "drizzle-orm/sqlite-core";

export const movies = sqliteTable("movies", {
  id: integer("id").primaryKey(),
  title: text("name"),
  releaseYear: integer("release_year"),
});

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We can use the drizzle-kit CLI to generate an initial SQL migration.

bunx drizzle-kit generate --dialect sqlite --schema ./schema.ts

---

This creates a new drizzle directory containing a .sql migration file and meta directory.

drizzle
├── 0000_ordinary_beyonder.sql
└── meta
    ├── 0000_snapshot.json
    └── _journal.json

---

We can execute these migrations with a simple migrate.ts script.

This script creates a new connection to a SQLite database that writes to sqlite.db, then executes all unexecuted migrations in the drizzle directory.

import { migrate } from "drizzle-orm/bun-sqlite/migrator";

import { drizzle } from "drizzle-orm/bun-sqlite";
import { Database } from "bun:sqlite";

const sqlite = new Database("sqlite.db");
const db = drizzle(sqlite);
migrate(db, { migrationsFolder: "./drizzle" });

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We can run this script with bun to execute the migration.

bun run migrate.ts

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Now that we have a database, let's add some data to it. Create a seed.ts file with the following contents.

import { db } from "./db";
import * as schema from "./schema";

await db.insert(schema.movies).values([
  {
    title: "The Matrix",
    releaseYear: 1999,
  },
  {
    title: "The Matrix Reloaded",
    releaseYear: 2003,
  },
  {
    title: "The Matrix Revolutions",
    releaseYear: 2003,
  },
]);

console.log(`Seeding complete.`);

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Then run this file.

bun run seed.ts

Seeding complete.

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We finally have a database with a schema and some sample data. Let's use Drizzle to query it. Replace the contents of index.ts with the following.

import * as schema from "./schema";
import { db } from "./db";

const result = await db.select().from(schema.movies);
console.log(result);

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Then run the file. You should see the three movies we inserted.

bun run index.ts

[
  {
    id: 1,
    title: "The Matrix",
    releaseYear: 1999
  }, {
    id: 2,
    title: "The Matrix Reloaded",
    releaseYear: 2003
  }, {
    id: 3,
    title: "The Matrix Revolutions",
    releaseYear: 2003
  }
]

---

Refer to the Drizzle website for complete documentation.