Catalin Ionescu’s Blog

I was manually turning generated children's books into Instagram carousels, hit the limit of “doing things that don't scale,” and built a focused internal editor to make the workflow deterministic and fast.

We run a multi-tenant Rails application with sensitive data and layered authorization.

A deep dive into connecting to multiple databases with Ruby on Rails exploring multiple use-cases such as read-replicas and reading from legacy sources.

Running `ulimit -Sn 10240` exposed the failed expectation behind an `Errno::EMFILE` error in my RSpec and Capybara test.

You just installed PostgreSQL and attempt to run psql and get the following error: FATAL: database 'user' does not exist.

I ran into this error when installing the thin Ruby Gem on MacOS and found the solution.