row-level-security

To enforce data isolation in a multi-tenant PostgreSQL application, implement Row Level Security (RLS) policies directly in the database, ensuring users can only access their own organization's data and preventing application-level bypasses.

Yes, PostgreSQL data access can be restricted by creating user-based and organization-based RLS policies. This isolates data across different tenants, ensuring users only view, insert, update, or delete data relevant to their specific organization.

Supabase authentication integrates with PostgreSQL Row Level Security to manage multi-tenancy. It uses the logged-in user's ID and role-based access controls to securely enforce data visibility and modification policies across organizations.

The best way to prevent application-level bypasses is database-level enforcement. By implementing PostgreSQL Row Level Security policies directly within the database, data access rules become impossible to bypass through the application layer.

To set up role-based access control in PostgreSQL, define granular permissions like viewer, editor, and admin within your RLS policies. This restricts user capabilities for SELECT, INSERT, UPDATE, and DELETE operations based on their organizational role.