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...

If you already selected an element and want to get its parent, you can call find(:xpath, '..') on it.

If you use awesome and make a Slack call, you'll constantly have an overlay window pop up taking over...

When an Rspec example fails, I usually investigate by running that example again using rspec . However, this does not work...

An end-to-end test (E2E test) is a script that remote-controls a web browser with tools like Selenium...

Slides for Henning's talk on Sep 21st 2017. Understanding sync vs. async control flow Talking to synchronous (or "blocking...

If you are using PDFKit / wkhtmltopdf, you might as well want to use custom fonts in your stylesheets. Usually this...

You need to set the :inverse_of option manually for relations that have an association to a polymorphic model. Otherwise...