Using Supabase in Node.js

  • Node.js
  • Gabriele Romanato

Supabase is a great open-source alternative to Firebase, based on PostgreSQL. It offers authentication, real-time database, storage, and much more. In this guide, we will see how to integrate it into a Node.js application.

Installation

To get started, install the Supabase client using npm:

npm install @supabase/supabase-js

Configuration

Once the package is installed, configure the Supabase client with your URL and API key. You can find this information in the Supabase dashboard.

const { createClient } = require('@supabase/supabase-js');

const SUPABASE_URL = 'https://your-project-url.supabase.co';
const SUPABASE_KEY = 'your-anon-key';

const supabase = createClient(SUPABASE_URL, SUPABASE_KEY);

Basic Operations

Insert Data

To insert data into a table, use the insert method:

async function insertData() {
  const { data, error } = await supabase
    .from('users')
    .insert([
      { name: 'Mario Rossi', email: 'mario@example.com' }
    ]);

  if (error) console.error(error);
  else console.log(data);
}

insertData();

Retrieve Data

To fetch data from a table, use the select method:

async function getData() {
  const { data, error } = await supabase
    .from('users')
    .select();

  if (error) console.error(error);
  else console.log(data);
}

getData();

Update Data

You can update data using the update method:

async function updateData() {
  const { data, error } = await supabase
    .from('users')
    .update({ name: 'Luigi Bianchi' })
    .eq('email', 'mario@example.com');

  if (error) console.error(error);
  else console.log(data);
}

updateData();

Delete Data

To delete a record, use the delete method:

async function deleteData() {
  const { data, error } = await supabase
    .from('users')
    .delete()
    .eq('email', 'mario@example.com');

  if (error) console.error(error);
  else console.log(data);
}

deleteData();

Authentication

Supabase also offers authentication with email and password. Here’s how to register a user:

async function signUp() {
  const { user, error } = await supabase.auth.signUp({
    email: 'test@example.com',
    password: 'password123'
  });

  if (error) console.error(error);
  else console.log(user);
}

signUp();

And to log in:

async function signIn() {
  const { user, error } = await supabase.auth.signInWithPassword({
    email: 'test@example.com',
    password: 'password123'
  });

  if (error) console.error(error);
  else console.log(user);
}

signIn();

Conclusion

Supabase greatly simplifies database and authentication management in a Node.js application. Thanks to its intuitive API, you can easily integrate advanced features without managing complex servers.

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