Capybara and most assistive technology will fail to find tags that are missing an href attribute. This will probably happen...
...file. Note that this is # not guaranteed to be 100% accurate. It performs a "best guess" based # on a simple test of the first +File.blksize+ characters. # # Example: # # File.binary?('somefile.exe') # => true...
...DateTime.strptime is not what you want You may eventually encounter DateTime.strptime. It's a "better" Time.parse where you can actually define the date format to parse, e.g. >> DateTime.strptime...
...If you use Rails' time_zone_select, you will be juggling zone names like "Berlin" which are actually unsupported. Unsupported zone identifiers are silently discarded and you'll end up...
Rails 7.1 added the normalizes method which can be used to normalize user input. It lets you define the fields...
Software engineering principles Read about the following software engineering principles and code smells: Single Responsibility Principle Law of Demeter
...component is using this class to render and modify some html, it may fastly become boilerplate to define every call of the method. Here callFake comes in handy, because it...
...of any dependent on the received arguments without having to know the exact arguments beforehand: spyOn(Random, 'shuffle').and.callFake((array) => array.reverse()) Now you can just assume any result of your...
Development environment setup Rails Composer Basically a comprehensive Rails Template. Prepares your development environment and lets you select web server...
In modern default RSpec configurations, your tests are usually run in random order. This helps to detect "flickering" tests that...
When using Rails to truncate strings, you may end up with strings that are still too long for their container...
...to be performed around a deploy. Be it to notify operations about changed application behavior, be it to run a little oneline script after the deploy. Most database-related stuff...
} Enumerable#index_with (Rails 6+) To generate a hash where array elements become hash keys, and values are calculated from them, use index_with. users = User.all
tl;dr The :is() pseudo selector - specificity of its most specific argument - matches against a comma-separated list of selectors...
use Postgres' lower() function add an index on lower(email) Probably the best approach is to just convert emails (and usernames) to lowercase within Rails. Popular authentication libraries...
The sidekiq-rate-limiter gem allows rate-limiting Sidekiq jobs and works like a charm. However, it needs to be...
While debugging a SPF record I found spf-record.de to be very helpful. it lists all IPs that are covered by...
You can not use the hash_including argument matcher with a nested hash: describe 'user' do let(:user) { {id: 1...
tl;dr The :where() pseudo selector - zero specificity - matches against a comma-separated list of selectors. Example Compound selectors like...
This may be awkward to set up, but will work once you're done. Fun facts:
Recently we detected a memory leak in one of our applications. Hunting it down, we found that the memory leak...
s keeps saturation unchanged. calc(100 - l) inverts lightness. For example, 0% becomes 100%, and 100% becomes 0%. Example usage .demo { --inverted-color: hsl(from currentColor calc(h...
In some projects we have issues with flaky tests. The best default is to fix them all. But in some cases it might be a pragmatic way to retry them...
This page lists many query methods and options in ActiveRecord which do not sanitize raw SQL arguments and are not...
Rails offers a way to prepend (or append) view paths for the current request. This way, you can make the...
Authentication is a special part of web applications. On the one hand, it usually is a crucial security mechanism restrict...