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Connect Hyperdrive to a Digital Ocean Postgres database instance.

This example shows you how to connect Hyperdrive to a Digital Ocean database instance.

1. Allow Hyperdrive access

To allow Hyperdrive to connect to your database, you will need to ensure that Hyperdrive has valid user credentials and network access.

DigitalOcean Dashboard

  1. Go to the DigitalOcean dashboard and select the database you wish to connect to.
  2. Go to the Overview tab.
  3. Under the Connection Details panel, select Public network.
  4. On the dropdown menu, select Connection string > show-password.
  5. Copy the connection string.

With the connection string, you can now create a Hyperdrive database configuration.

2. Create a database configuration

To configure Hyperdrive, you will need:

  • The IP address (or hostname) and port of your database.
  • The database username (for example, hyperdrive-demo) you configured in a previous step.
  • The password associated with that username.
  • The name of the database you want Hyperdrive to connect to. For example, postgres.

Hyperdrive accepts the combination of these parameters in the common connection string format used by database drivers:

postgres://USERNAME:PASSWORD@HOSTNAME_OR_IP_ADDRESS:PORT/database_name

Most database providers will provide a connection string you can directly copy-and-paste directly into Hyperdrive.

To create a Hyperdrive configuration with the Wrangler CLI, open your terminal and run the following command. Replace <NAME_OF_HYPERDRIVE_CONFIG> with a name for your Hyperdrive configuration and paste the connection string provided from your database host, or replace user, password, HOSTNAME_OR_IP_ADDRESS, port, and database_name placeholders with those specific to your database:

Terminal window
npx wrangler hyperdrive create <NAME_OF_HYPERDRIVE_CONFIG> --connection-string="postgres://user:password@HOSTNAME_OR_IP_ADDRESS:PORT/database_name"

This command outputs a binding for the Wrangler configuration file:

{
  "name": "hyperdrive-example",
  "main": "src/index.ts",
  "compatibility_date": "2024-08-21",
  "compatibility_flags": [
    "nodejs_compat"
  ],
  "hyperdrive": [
    {
      "binding": "HYPERDRIVE",
      "id": "<ID OF THE CREATED HYPERDRIVE CONFIGURATION>"
    }
  ]
}

3. Use Hyperdrive from your Worker

Install Postgres.js ↗:

Terminal window
# Postgres.js 3.4.5 or later is recommended
npm install postgres

Add the required Node.js compatibility flags and Hyperdrive binding to your wrangler.jsonc file:

{
  "compatibility_flags": [
    "nodejs_compat"
  ],
  "compatibility_date": "2024-09-23",
  "hyperdrive": [
    {
      "binding": "HYPERDRIVE",
      "id": "<your-hyperdrive-id-here>"
    }
  ]
}

Create a Worker that connects to your PostgreSQL database via Hyperdrive:

// filepath: src/index.ts
import postgres from "postgres";


export default {
  async fetch(
    request: Request,
    env: Env,
    ctx: ExecutionContext,
  ): Promise<Response> {
    // Create a database client that connects to your database via Hyperdrive
    // using the Hyperdrive credentials
    const sql = postgres(env.HYPERDRIVE.connectionString, {
      // Limit the connections for the Worker request to 5 due to Workers' limits on concurrent external connections
      max: 5,
      // If you are not using array types in your Postgres schema, disable `fetch_types` to avoid an additional round-trip (unnecessary latency)
      fetch_types: false,
    });


    try {
      // A very simple test query
      const result = await sql`select * from pg_tables`;


      // Clean up the client, ensuring we don't kill the worker before that is
      // completed.
      ctx.waitUntil(sql.end());


      // Return result rows as JSON
      return Response.json({ success: true, result: result });
    } catch (e: any) {
      console.error("Database error:", e.message);


      return Response.error();
    }
  },
} satisfies ExportedHandler<Env>;

Next steps