When your public-facing application has a longer downtime for server maintenance or long migrations, it's nice to setup...
Slides for Henning's talk on Sep 21st 2017. Understanding sync vs. async control flow Talking to synchronous (or "blocking...
You need to set the :inverse_of option manually for relations that have an association to a polymorphic model. Otherwise...
After loading a staging dump into development, you might get an ActiveRecord::EnvironmentMismatchError when trying to replace the database (like...
When localizing model attributes via I18n you may run into errors like this: I18n::InvalidPluralizationData: translation data {...
...} can not be...
If another session is accessing your database you are trying to reset or drop you might have seen the following...
I frequently find myself needing a combination of group_by, count and sort for quick statistics. Here's a method...
before(:all) runs the block once before all of the examples. before(:each) runs the block once before each...
There are many approaches out there how you can import data from a legacy application to a new application. Here...
Scope is all about where something is visible. It’s all about what (variables, constants, methods) is available to you...
You should prefer native promises to jQuery's Deferreds. Native promises are much faster than their jQuery equivalent. Native promises...
Native promises have no methods to inspect their state. You can use the promiseState function below to check whether a...
Use Traim to build a RESTful API for your ActiveRecord models with very little code. Traim assumes your API resources...
Sometimes you add Paperclip image styles, sometimes you remove some. In order to only keep the files you actually need...
You can not use the hash_including argument matcher with a nested hash: describe 'user' do let(:user) { {id: 1...
ActiveRecord::RecordNotFound errors provide quite meaningful error messages that can provide some insight on application details. Consider the following:
select2 is a great jQuery library to make (large) fields more usable. For Bootstrap 3 there is select2-bootstrap-theme...
I needed to make sure that an element is visible and not overshadowed by an element that has a higher...
This card will show you a cool way to define a class using Struct.new. A common usecase for Structs are...
When using GROUP BY, MySQL now complains if the SELECT includes columns which are not part of the GROUP BY...
Since Rails 5, domain models inherit from ApplicationRecord by default. This is the place to put code that should be...
Rails supports time zones, but there are several pitfalls. Most importantly because Time.now and Time.current are completely different things and...
Webmocks hash_including is similar to RSpec::Mocks::ArgumentMatchers#hash_including. Be aware that hash_including (webmock v3.0.1) doesn't...
Typhoeus has a different way of representing array params in a get request than RestClient. Typhoeus: http://example.com/?foo[0]=1&foo[1]=2&foo[2]=3