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Building Production-Grade Web Applications with Supabase

You're reading from   Building Production-Grade Web Applications with Supabase A comprehensive guide to database design, security, real-time data, storage, multi-tenancy, and more

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Product type Paperback
Published in Aug 2024
Publisher Packt
ISBN-13 9781837630684
Length 534 pages
Edition 1st Edition
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Author (1):
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David Lorenz David Lorenz
Author Profile Icon David Lorenz
David Lorenz
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Table of Contents (20) Chapters Close

Preface 1. Part 1:Creating the Foundations of the Ticket System App
2. Chapter 1: Unveiling the Inner Workings of Supabase and Introducing the Book’s Project FREE CHAPTER 3. Chapter 2: Setting Up Supabase with Next.js 4. Chapter 3: Creating the Ticket Management Pages, Layout, and Components 5. Part 2: Adding Multi-Tenancy and Learning RLS
6. Chapter 4: Adding Authentication and Application Protection 7. Chapter 5: Crafting Multi-Tenancy through Database and App Design 8. Chapter 6: Enforcing Tenant Permissions with RLS and Handling Tenant Domains 9. Chapter 7: Adding Tenant-Based Signups, including Google Login 10. Part 3: Managing Tickets and Interactions
11. Chapter 8: Implementing Dynamic Ticket Management 12. Chapter 9: Creating a User List with RPCs and Setting Ticket Assignees 13. Chapter 10: Enhancing Interactivity with Realtime Comments 14. Chapter 11: Adding, Securing, and Serving File Uploads with Supabase Storage 15. Part 4: Diving Deeper into Security and Advanced Features
16. Chapter 12: Avoiding Unwanted Data Manipulation and Undisclosed Exposures 17. Chapter 13: Adding Supabase Superpowers and Reviewing Production Hardening Tips 18. Index 19. Other Books You May Enjoy

Understanding safe-guarded API updates or deletion

In SQL, when you run a query such as DELETE FROM table or UPDATE table, it will obviously complete this for all rows if no WHERE clause is provided – you have admin rights. However, Supabase prevents you from using unlimited deletions or updates of rows when using the Supabase API (using the Supabase client, hence using PostgREST).

You can ensure that this setting is on by running this statement:

SELECT useconfig FROM pg_shadow WHERE usename = 'authenticator';

Inside the returned useconfig value, safeupdate should show up within the session_preload_libraries setting.

At this link, you can find out how to activate this extension for specific roles: https://supabase.com/docs/guides/database/extensions/pg-safeupdate#enable-the-extension. Now, I would love to activate this for the postgres admin role to avoid accidentally running DELETE expressions without a WHERE clause, but unfortunately, this cannot be enabled...

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