Query D1 from Hono

Hono is a fast web framework for building API-first applications, and it includes first-class support for both Workers and Pages.

When using Workers:

Ensure you have configured your Wrangler configuration file to bind your D1 database to your Worker.
You can access your D1 databases via Hono's Context ↗ parameter: bindings ↗ are exposed on context.env. If you configured a binding named DB, then you would access D1 Workers Binding API methods via c.env.DB.
Refer to the Hono documentation for Cloudflare Workers ↗.

If you are using Pages Functions:

Bind a D1 database to your Pages Function.
Pass the --d1 BINDING_NAME=DATABASE_ID flag to wrangler dev when developing locally. BINDING_NAME should match what call in your code, and DATABASE_ID should match the database_id defined in your Wrangler configuration file: for example, --d1 DB=xxxx-xxxx-xxxx-xxxx-xxxx.
Refer to the Hono guide for Cloudflare Pages ↗.

The following examples show how to access a D1 database bound to DB from both a Workers script and a Pages Function:

import { Hono } from "hono";

// This ensures c.env.DB is correctly typed
type Bindings = {
	DB: D1Database;
};

const app = new Hono<{ Bindings: Bindings }>();

// Accessing D1 is via the c.env.YOUR_BINDING property
app.get("/query/users/:id", async (c) => {
	const userId = c.req.param("id");
	try {
		let { results } = await c.env.DB.prepare(
			"SELECT * FROM users WHERE user_id = ?",
		)
			.bind(userId)
			.run();
		return c.json(results);
	} catch (e) {
		return c.json({ err: "Failed to query user" }, 500);
	}
});

// Export our Hono app: Hono automatically exports a
// Workers 'fetch' handler for you
export default app;

import { Hono } from "hono";
import { handle } from "hono/cloudflare-pages";

// This ensures c.env.DB is correctly typed
type Bindings = {
	DB: D1Database;
};

const app = new Hono<{ Bindings: Bindings }>().basePath("/api");

// Accessing D1 is via the c.env.YOUR_BINDING property
app.get("/query/users/:id", async (c) => {
	const userId = c.req.param("id");
	try {
		let { results } = await c.env.DB.prepare(
			"SELECT * FROM users WHERE user_id = ?",
		)
			.bind(userId)
			.run();
		return c.json(results);
	} catch (e) {
		return c.json({ err: "Failed to query user" }, 500);
	}
});

// Export the Hono instance as a Pages onRequest function
export const onRequest = handle(app);