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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

Working with complex table joins

We’ve learned about joining related tables by using nested select strings (for example, fetching related comments in tickets), but with Supabase, you can do the following:

  • Resolve ambiguous joins, to avoid errors, explicitly
  • Rename joined tables on the fly
  • Create inner joins to only return data where related data exists
  • Combine the renaming feature with the inner join feature

Let me show you a few practical examples.

In our tickets table, we have two user references: created_by -> public.service_users and assignee -> public.service_users. I want to retrieve both user objects with a join. We do so by nesting the related table like so:

supabase.from("tickets").select("*, service_users(*)");

This will fail – since there are two pointers pointing to service_users, it will not know which one to resolve.

However, you can also resolve this another way, by declaring two explicit joins...

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