Production threw a cryptic error. Logs were quiet. I blamed custom error pages and routing first. The real bug was an old gem that no longer matched the framework.
7 min readA subtle but painful bug: a route gets removed (or commented out), a URL helper in the sitemap view breaks, the app starts returning 500 in production — and the test suite stays green. Here is how that happens and how to prevent it.
6 min readRuby namespace syntax can look equivalent, but `module A::B::C` and nested `module A; module B; module C; end; end; end` do not behave the same when parent constants are missing. This is a practical walkthrough of how Ruby resolves constants and why load order matters.
3 min readNeed a website fast, but not sure whether to build a simple one-page site or a full platform? Here is the practical decision framework I use with clients: Astro for speed and conversion-focused pages, Rails for products that need accounts, workflows, and long-term scalability.
4 min readStarting Rails can feel overwhelming when you are choosing between tutorials, videos, and outdated guides. This is the beginner roadmap I recommend to go from your first app to a real deployment, including the one book I consistently suggest: Hurtls' From Zero to Deploy.
5 min readMost Rails apps are not slow because of Ruby itself. They are slow because of repeatable bottlenecks: N+1 queries, over-fetching, missing indexes, and expensive work in the request cycle. Here is the practical playbook I use to make Rails apps feel fast without premature optimization.
6 min readOne slow template, one oversized script, one forgotten redirect—and suddenly your Core Web Vitals slip across hundreds of URLs. Unlighthouse is the fastest way I’ve found to run Lighthouse across an entire site, prioritize fixes by business impact, and turn performance work into an SEO growth lever instead of a never-ending backlog.
8 min readRails magic is powerful—until it isn't. Discover why `find_or_create_by` can sometimes bypass your validations and trigger 500 errors, and learn the clean, one-line fix to keep your database integrity rock-solid.
3 min readEver had a test fail despite the data looking perfect? When dealing with Elasticsearch and RSpec, the standard debugging flow often isn't enough. In this post, I walk through how I mirrored my test environment in a manual browser session to uncover a subtle bug involving `ActionController::Parameters` and indifferent access.
3 min readDiscover the most efficient way to fetch random records in Rails — from ActiveRecord to SQL. Using built-in database features together with my gem, RandomRails.
1 min readLearn how to verify the Monobank Acquiring API webhook sign using a Ruby script. This script demonstrates a simple yet effective method to validate the webhook sign using the shared secret key.
3 min read