Lucas Mendelowski
@lmendelowski
Developer focused on building web-applications.
Who am I going to meet at #railsworld this year in Amsterdam?
Another idea inspired by the Ash Framework book: my journey into the pin operator and macros in #Elixir. Check it out: mendelowski.com/blog/2025/03/u… I'm not an Elixir expert, so I welcome feedback from more experienced Elixir folks. Hope you enjoy it!
Terminal enthusiasts who use ClaudeCode and Neovim, check this plugin: github.com/coder/claudeco… I've just started using it and it looks promising!
Missed our last KRUG meetup? It's been 2 weeks, but you can still catch up! 🙌 Photos: facebook.com/share/p/1Sh7VU… Slides: github.com/Krakow-Ruby-Us… Thanks to @rubycentralorg, @fastly & Forte Digital! ❤️
Next KRUG meetup is on June 10 at 18:00 at Forte Space (Krupnicza 3, Kraków). Powered by @rubycentralorg & @fastly. Talks: - Michał Papis: Code UnCov i Pluginator - José Valim: Livebook: where Web, AI & Concurrency meet RSVP 👉 lu.ma/krug See you there! 🚀
Missed the last KRUG meetup? Here’s the recap 👇 📸 Photos: facebook.com/photo/?fbid=71… 🖥️ Slides: github.com/Krakow-Ruby-Us… Next KRUG: June 10th – see you there! Thanks to our amazing speakers! 🙌
Hello Ruby Enthusiasts! We’re back with another Kraków Ruby Users Group (KRUG) meetup, and this time we're thrilled to partner with Forte Digital (fortedigital.com/pl), who offered their Forte Space to host us. 📅 May 13, 2025, at 18:00 More info: lu.ma/pnamdg3o
Hello Ruby Enthusiasts! We’re back with another Kraków Ruby Users Group (KRUG) meetup, and this time we're thrilled to partner with Forte Digital (fortedigital.com/pl), who offered their Forte Space to host us. 📅 May 13, 2025, at 18:00 More info: lu.ma/pnamdg3o
For those who couldn't join us, here are the recordings of the presentations: youtu.be/n0vlESnSjy4 youtu.be/q9059wVh4GE youtu.be/iKKRLHm1OxU Thank you @visualitypl for recording them!
KRUG #1 2025 is here! Featuring three fantastic talks. The event powered by Zendesk and serving as the unofficial kickoff to Ruby Community Conference. 📅 Feb 27, 2025 – 17:30 📍 Marii Konopnickiej 29, Kraków 🔗 More details here: lu.ma/dow2zgc5
Huge thanks to @jonatasdp, @halaszdavid, and @segiddins for their amazing talks! It was great to host you here in Kraków - you made the whole experience special!
The KRUG #1 2025 meetup was truly amazing. The synergy between the KRUG and the conference was a one-of-a-kind experience! A huge thank you to @Zendesk for their support, and to @KozieMariusz and the @visualitypl team! Recap: youtube.com/watch?v=E1qCcc…
The KRUG #1 2025 meetup was truly amazing. The synergy between the KRUG and the conference was a one-of-a-kind experience! A huge thank you to @Zendesk for their support, and to @KozieMariusz and the @visualitypl team! Recap: youtube.com/watch?v=E1qCcc…
KRUG #1 2025 is here! Featuring three fantastic talks. The event powered by Zendesk and serving as the unofficial kickoff to Ruby Community Conference. 📅 Feb 27, 2025 – 17:30 📍 Marii Konopnickiej 29, Kraków 🔗 More details here: lu.ma/dow2zgc5
Great time at the Ruby Community Conference here in Krakow, Poland. Thanks to the organizers, speakers and sponsors 🙏
🚀 KRUG Meetup & Ruby Community Conference workshops sign-ups open on February 20! 🔥 Get ready! Spots are limited! KRUG is open to all, but workshops are only for conference attendees. Secure your seat before it’s too late! 🔥 👉 rubycommunityconference.konfeo.com
Recently, I started reading the "Ash Framework" book. While building the example app, I spotted an area for improvement - leading to my first-ever contribution to the 🧪 Elixir ecosystem! My changes to @AshFramework and `ash_postgres` are ready for release! 🚀 #MyElixirStatus
Come for the talks, stay for the community. We can't wait to see you there! 🚀
KRUG #1 2025 is here! Featuring three fantastic talks. The event powered by Zendesk and serving as the unofficial kickoff to Ruby Community Conference. 📅 Feb 27, 2025 – 17:30 📍 Marii Konopnickiej 29, Kraków 🔗 More details here: lu.ma/dow2zgc5
Another great article by @maciejmensfeld. Make your apps safer by upgrading Bundler and enabling checksum verifications. Start 2025 with stronger security!
🔐 I wrote about Bundler 2.6's game-changing checksum verification - a silent guardian for your applications. Learn how to secure your dependencies with just a few commands. Check it out 👇 mensfeld.pl/2025/01/the-si… #ruby #rubyonrails #security
Wow... What a surprise! Look what I found in my mailbox. Thank you so much, @inazarova ! That’s so kind of you. PS. It’s also my birthday today, so you couldn’t have picked a better day!

If one of your 2025 resolutions is to explore modern front-end solutions for #rails, I’ve got you covered. Check out my blog post and repo comparing #Hotwire, @htmx_org , @unpolyjs and @inertiajs. github.com/lcmen/hotwire-… mendelowski.com/blog/2024/11/h…
I know that no one asked for it, but I've added @inertiajs to the mix (with React without JSX transpilation!). Compare it with #hotwire, @htmx_org, and @unpolyjs. The same principle as before: single controller, no build, importmap, and propshaft.
Recently, I've built a simple TODO app with Rails to compare #hotwire @htmx_org and @unpolyjs . It follows progressive enhancement spirit (the same controller is used for all the variants). You can check it here: github.com/lcmen/hotwire-…
#TIL that #postgresql allows you to create custom aggregate functions cybertec-postgresql.com/en/writing-you… Nice!