Recently we detected a memory leak in one of our applications. Hunting it down, we found that the memory leak...
The linked content includes a few design patterns implemented with Ruby on Rails. What is the card indented to achieve...
This should be fixed in the latest LTS-branches of our mysql2 fork, 0.2.x-lts and 0.3.x-lts...
To read the Rails session from a Rack middleware, use env['rack.session']. It's an ActionDispatch::Request::Session object.
Issue: You have an app using jsbundling-rails and esbuild. After deploy, the assets built by esbuild are missing in...
While working on a Rails application, your code base will grow a collection of different file types including: Ruby (business...
In case you have trouble with the zeitwerk autoloader, you can check out the documentation Autoloading and Reloading Constants and...
Instead of using Puppet exported resources you can use the puppetdb_query feature. This can result in more complex code...
tl;dr Since Rails 6.1+ you can use .compact_blank or .compact_blank! to remove blank values from collections (e.g...
When paginating records, we usually need to know the number of total records in order to render pagination links. Popular...
I recently wanted to add a model for address information but also wanted to add a unique index to those...
Imagine these models and associations: class Deck < ApplicationRecord has_many :cards end class Card < ApplicationRecord belongs_to :deck, optional: true...
When changing code in mailers, updating the corresponding mailer preview can be forgotten very easily. Mailer previews can be tested...
When redirecting you should take care to use the right HTTP status code. From controllers When redirecting from a controller...
Recent IRB versions include a multi-line autocomplete which may be helpful to novice users but can be distracting.
It might sometimes be useful to check whether your Rails application accesses the file system unnecessarily, for example if your...
While verifying doubles in RSpec is a good default, it is limited in the amount of methods it actually is...
There is a way to use multiple databases in Rails. You may have asked yourself how you're able to...
tl;dr You can use attribute? as shorthanded version of attribute.present?, except for numeric attributes and associations. Technical Details
Due to the way we setup Jasmine tests in our projects, you may run into various errors when Jasmine boots...
This card explains how to generate an entity relationship diagram for your Rails application. We also show how to limit...
This are the steps I needed to do to add esbuild to an application that used the vanilla rails asset...
We use foreman to start all necessary processes for an application, which are declared in a Procfile. This is very...
Building application assets with esbuild is the new way to do it, and it's great, especially in combination with...