Instant Multi-Tenant GraphQL APIs with PostGraphile, RLS, and PropelAuth

GraphQL provides a flexible API interface that returns precisely requested data, and the tutorial demonstrates how to build a secure multi-tenant wiki application using PostGraphile, PropelAuth, PostgreSQL Row Level Security, React, and Apollo. PostGraphile automatically generates a GraphQL API from a PostgreSQL schema, while PropelAuth supplies user authentication, organization membership, invitations, and role management. Authentication middleware validates access tokens and organization membership, then passes user, organization, and role information into PostgreSQL settings so Row Level Security policies can ensure users can read or modify only records belonging to their organization and create pages only under their own identity. On the frontend, React authentication and Apollo providers automatically attach access tokens and selected organization IDs to GraphQL requests, enabling authenticated queries and mutations. The approach also highlights the need to limit exposed database schema through namespaces, views, and PostGraphile smart tags, while supporting expanded role-based permissions through multiple PostgreSQL roles and policies.

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