HOWTOs for Ruby on Rails and JavaScript

How to: A thorough i18n completeness check in CI (Rails + i18n-tasks)

Rails i18n completeness can drift across tiers and locales; CI with i18n-tasks catches missing, unused, inconsistent, and normalized translation files.

Edit

An introduction to Hybrid search

Hybrid search combines vector retrieval and BM25 keyword search to catch paraphrases and exact terms, improving recall when either method alone misses relevant documents.

Edit

Optimizing images for LLM inference

Reducing image size and trimming whitespace lowers vision-token cost while keeping text readable; OCR-based strip slicing can keep dense pages within context limits.

Edit

How to define a table prefix for all Rails models in a namespace

Rails namespaces can produce doubled table prefixes when table_name_prefix is set on individual models. Defining it on the namespace module keeps nested model table names correct.

Edit

Devise: Don't forget to lock users with soft delete

Soft-deleted users can stay authenticated in Devise unless account activity checks are tied to the trash state. Customizing active_for_authentication? blocks sign-in and protects password reset flows.

github.com

Edit

Heads up: Quering array columns only matches equally sorted arrays

PostgreSQL array queries in Rails match element order, so [16, 17] and [17, 16] are different. Order-independent matching needs normalization or bidirectional containment.

Edit

A simpler default controller implementation

Rails controllers can stay short, testable and authorization-friendly by using a minimal shared blueprint for CRUD, strong params, scopes and optional HTTP caching.

Edit

How to write modular code

Reduce spaghetti code by splitting behavior into focused functions, service classes, form models, and value objects, while avoiding long parameter lists and excessive DRY.

Edit

Rails: Example on how to extract domain independent code from the `app/models` folder to the `lib/` folder

Move API-client code out of app/models into lib/ to separate domain logic from reusable infrastructure and keep Rails code more maintainable.

Edit

Use <input type="number"> for numeric form fields

Numeric form fields on mobile get digit-focused keyboards, locale-aware decimal display, and consistent point-based values in JavaScript and form submission.

Edit

Bash: How to count and sort requests by IP from the access logs

Count and sort request frequencies by client IP in access logs with a short awk pipeline for quick traffic checks and abuse spotting.

Edit

Don't use migrations to seed default data

Seeding rows in a Rails migration breaks tests that expect an empty database and creates maintenance pain. Use db/seed.rb or a script in lib/scripts for default application data.

Edit

Heads up: Byebug has problems with zeitwerk

Byebug 11.1.3 can trigger NameError with Rails 6 zeitwerk autoloading; binding.pry, eager loading, or another debugger avoid the issue.

Edit

ActiveRecord: When aggregating nested children, always exclude children marked for destruction

Nested form deletions can inflate aggregated totals when child records marked for removal are still counted. marked_for_destruction? filters them out before saving.

Edit

Passive event listeners may speed up your scroll and touch events

Passive listeners let the browser keep scrolling responsive by not waiting for touch or wheel handlers that never cancel default behavior.

github.com

Edit

CSP: Nonces are propagated to imports

Module scripts with a nonce automatically pass that trust to dynamic import(), enabling chunk loading under restrictive CSP without strict-dynamic.

Edit

How to update a single gem conservatively

Updating one gem with bundle update can pull in dependency upgrades and break existing code. Bundler --conservative limits changes to the targeted gem and avoids unnecessary transitive updates.

Edit

How to disable Chrome's save password bubble for Selenium tests

Chrome’s password-save bubble can clutter Selenium debugging when forms trigger credential prompts. Disabling the password manager via profile prefs or using Incognito suppresses it.

Edit