RailsConf 2022 - Reflecting on Active Record Associations by Daniel Colson

Active Record associations seem magical-add a has_many here, a belongs_to there, and suddenly your models are loaded with behavior. Could it be magic, or is it plain old Ruby with some thoughtful design and a bit of metaprogramming? In this talk we'll study Active Record associations by writing our own belongs_to and has_many macros. We'll dynamically define methods, cache query results, replace a a Relation with a CollectionProxy, and automatically prevent N+1 queries with inverses. You'll leave with a deeper understanding of associations, and a new appreciation for their magic.
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[@DanDanilyuk]

Great talk. Bonus points for making it hilarious.

[@FF-ne2qz]

Daniel, thank you very much for this presentation. That was the only one I was waiting for and it helped a lot.

[@een_schildpad]

Awesome talk!!! I've always struggled to understand things like collection proxies and how it all works together, so it was fun to see it deconstructed in a way that was simpler to comprehend 🎉

[@ankk98]

So many great concepts explained so well.
I will watch a few more times and try to implement these concepts in a case where rails magic is needed.