Error Supabase hosting: django.db.utils.OperationalError: Tenant or user not found

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04-10-2024

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Django and Supabase: Tackling the "Tenant or user not found" Error

When integrating your Django project with Supabase for database management, you might encounter the dreaded "django.db.utils.OperationalError: Tenant or user not found" error. This article aims to help you understand the root cause of this error and provide a clear solution.

The Scenario

Let's imagine you're setting up a Django project using Supabase as your backend database. You've configured your database settings and have ensured you're connected to the correct Supabase database. However, when you try to access your data in your Django views, you get hit with the "django.db.utils.OperationalError: Tenant or user not found" message.

Here's an example of what your Django settings might look like:

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': 'your_supabase_database',
        'USER': 'your_supabase_user',
        'PASSWORD': 'your_supabase_password',
        'HOST': 'your_supabase_host',
        'PORT': '5432',
    }
}

This error arises when your Django application attempts to connect to Supabase using the provided credentials, but the user or database specified in your settings isn't found.

Understanding the Error

The "Tenant or user not found" error in this context indicates that the Django application cannot establish a connection to the Supabase database using the credentials you have specified. This usually happens because of one or more of the following reasons:

• Incorrect credentials: You might have entered the wrong username, password, or database name in your Django settings. Double-check your settings and confirm that the values match the ones you use to access your Supabase database.
• Missing permissions: Your user might not have the necessary permissions to access the specified database. Ensure that your Supabase user has "read" and "write" permissions on the database you are trying to connect to.
• Database not created: You might be trying to access a database that hasn't been created yet in your Supabase project.
• Firewall limitations: Network firewalls might be blocking the connection. This is less common but worth considering if other connections are successful.

Troubleshooting and Solutions

1. Verify Credentials:

   • Carefully review your Django settings and ensure that the database name, username, and password are correct.
   • Check the settings in your Supabase project for the correct database name, username, and password.
   • Double-check that the HOST value in your settings points to the correct Supabase host URL.

2. Check Permissions:

   • Log in to your Supabase dashboard and verify that the user specified in your settings has the appropriate permissions to access the database.
   • If your user doesn't have the necessary permissions, grant them access in the Supabase dashboard.

3. Create the Database:

   • If you haven't already, create the database in your Supabase project. You can do this through the Supabase dashboard.

4. Check Firewall Settings:

   • Review your firewall settings and ensure that the port used by Supabase (usually port 5432) is allowed for incoming connections.

5. Restart Supabase:

   • Sometimes restarting your Supabase project can resolve temporary connection issues.

6. Clear Database Cache:

   • Clearing the database cache in your Django application can sometimes resolve issues related to stale connection information.

7. Restart Django Server:

   • Ensure your Django server is restarted after making changes to your settings.

Additional Tips

• Consider using a tool like psql (the PostgreSQL command-line interface) to test your database credentials directly. This can help isolate whether the issue is with your Django application or with your Supabase connection.
• If you're using a tool like docker to run your Django application, make sure that the container has access to the Supabase database.

By following these steps, you should be able to resolve the "Tenant or user not found" error and successfully connect your Django application to your Supabase database. Remember to review your settings, check for permissions, and test your connections diligently to ensure a smooth integration.