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...
It might sometimes be useful to check whether your Rails application accesses the file system unnecessarily, for example if your...
Testing file download links in an end-to-end test can be painful, especially with Selenium. The attached download_helpers.rb provides...
While verifying doubles in RSpec is a good default, it is limited in the amount of methods it actually is...
I recently had the problem that embedded code boxes crashed my layout. It turned out that pres break out of...
You'll need openssl-3 or newer for servers running 22.04 Ruby version 3.1 uses by default the gem openssl...
When you are working with SVG files and ImageMagick you can get different results on different machines depending on which...
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
When you need information about a gem (like version(s) or install path(s)), you can use the gem binary...
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...
Redis.current will be removed without replacement in redis-rb 5.0. Version 4.6.0 adds deprecation warnings for Redis.current and Redis.current=: `Redis.current...
This are the steps I needed to do to add esbuild to an application that used the vanilla rails asset...
In SQL, NULL represents an "unknown" value. Because of this, it does not behave like a standard piece of data...
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...
Attaching files to a field that is handled by Carrierwave uploaders (or maybe any other attachment solution for Rails) in...
You want to deploy new features but the latest commits are not ready for production? Then use git merge master...
When Capybara locates elements in the DOM, by default it allows only accessing visible elements -- when you are using a...
One really simple way to check whether JavaScript Sentry integration was successful (raven-js or @sentry/browser), is to create an...
RSpec Rails can automatically mix in different behaviors to your tests based on their type tag, for example enabling you...