Tbh I had no idea this was even a thing until recently. I've been working with Rails for a while now and somehow never came across it. So let me explain it the way I understood it. You know how we normally do associations in Rails, User has many Posts, Post belongs to User. Two different models, two different tables. Simple. But what if a model needs to reference itself? Like same table, same mode
It was 2:47 AM when the alerts started. A seemingly straightforward database migration had triggered a cascading failure across three downstream services, and our payment processing pipeline was dropping roughly 12% of transactions. The on-call engineer didn't need to wake anyone, locate a rollback script, or wait for a CI pipeline to churn through another deploy. She opened the LaunchDarkly dashb