When your Rails controller calls render, you can pass a :status option for the HTTP status code: render 'results', status...
When a Rails controller action should handle both HTML and JSON responses, do not use request.xhr? to decide that. Use...
Note netstat has mostly been superseeded by its more modern rewrite ss which nowadays comes pre-installed rather than netstat...
When installing gems, a lot of time is spent building locally installed documentation that you probably never use.
When you have a pending Cucumber step (or feature) that also uses an existing VCR cassette, your pending test may...
Katapult 0.3.0 brings Rails 5 and Ruby 2.5 support with a new design, plus a ton of smaller features, fixes...
Enumerable#all? returns true for an empty collection. This totally makes sense but you have to think about it when...
ActiveSupport::Dependencies takes care of auto-loading any classes in development. This is usually useful, but when you run into...
TL;DR Use user.update!(remove_avatar: true) to delete attachments outside of forms. This will have the same behavior as...
To check which elements an ActiveRecord relation contains use the contain_exactly matcher. describe User do let!(:admin) { create(:user...
This article will show you how to use throw and catch. It's a nice tool to break out of...
The issue: You are using stub_const to change a constant value for your test. stub_const "SomeClass::CONST", 'test...
Rails applications and ruby gems should have a README that gives the reader a quick overview of the project. Its...
You should avoid using application models in your migrations. But how else could you create records in a migration?
To check if a method has been called in Jasmine, you first need to spy on it: let spy = spyOn...
Situation: You want to write a spec for a function inside an Angular service. This function at some point makes...
By default, browsers will not wrap text at syllable boundaries. Text is wrapped at word boundaries only. This card explains...
When writing XLSX files, there are gems like rubyXL or axlsx. While they do offer features like formatting or graphs...
PostgreSQL's Common Table Expressions (CTEs) can be used to extract sub-queries from bulky SQL statements into a temporary...
PostgreSQL supports the SQL OVERLAPS operator. You can use it to test if two date ranges overlap: => SELECT ('2001-02...
When attempting to update RubyGems, depending on updates your previously performed, you might run into an error ERROR: While executing...
A common pattern in Ruby is to to require all files in a specific diretory, using something like Dir.glob(Rails.root.join...
Checking if a JavaScript value is of a given type can be very confusing: There are two operators typeof and...
RSpec allows you to mark a single Example/ExampleGroup so that only this will be run. This is very useful when...