November 2017
Intermediate to advanced
1084 pages
28h 41m
English
Content preview from The Rails 5 Way, Fourth Edition
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Chapter 7 Active Record Associations
Any time you can reify something, you can create something that embodies a concept, it gives you leverage to work with it more powerfully. That’s exactly what’s going on with has_many :through.
—Josh Susser
Active Record associations let you declaratively express relationships between model classes. The power and readability of the Associations API is an important part of what makes working with Rails so special.
This chapter covers the different kinds of Active Record associations available while highlighting use cases and available customizations for each of them. We also take a look at the classes that give us access to relationships themselves.
7.1 The Association Hierarchy
Associations typically appear ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.