When your Rails application offers downloading a bunch of files as ZIP archive, you basically have two options:
You can use nmap to find out what service is running behind a given port, and most often see some details about it. This can be helpful if...
When internationalizing your Rails app, you'll be replacing strings like 'Please enter your name' with t('.name_prompt'). You...
...often show or hide elements based on viewport dimensions, or may have components that behave differently (like mobile vs desktop navigation menus). Since you want your integration tests to behave...
...metrics". This allows you to configure dimensions larger than your display and enable/disable touch behavior. Simply use register_driver to set up a driver that you then connect to Capybara...
...nesting level of elements. When it comes to white-space preserving content, this may become a problem: the content will be rendered including the HTML indentation. Problematic: Preserved Indentation
%pre = content Reference Hello World Better: Without Extra Indentation Render with tilde ~ instead of equals = to keep Haml from indenting content: .nest %span Reference %pre ~ content Reference
Let's say you have a gem which has the following module: module SuperClient def self.foo 'Foo' end
In the discussion of the difference between include and extend in Ruby, there is a misconception that extend would add...
Bundler allows you to specify the name of the Gemfile you want to bundle with the BUNDLE_GEMFILE environment variable...
Authentication is hard: there are many edge cases, and most users (including yourself) usually only go the "happy path" once...
...the HTML required attribute. We usually turn it off due to difficulties controlling its behavior and appearance. Instead we only mark required fields with an asterisk (*) next to its label...
...after submitting the form due to the now displayed error messages. A compromise with better accessibility is to add the aria-required attribute in this case. This allows screen readers...
before(:all) runs the block once before all of the examples. before(:each) runs the block once before each...
When changing code in mailers, updating the corresponding mailer preview can be forgotten very easily. Mailer previews can be tested...
...the file system. Since load order can be important, this may lead to different behavior on different machines which are hard to debug. Simply add a .sort: Dir.glob(Rails.root.join('lib/ext...
In RSpec you can tag examples or example groups with any tags you like simply by saying describe ReportCreator, slow...
While debugging an intricate issue with failed HTTP requests I have come to appreciate the more advanced features of the...
In Rails 8 the behavior of the rails db:migrate command has changed for fresh databases (see PR #52830). Before Rails 8: The command runs all migrations in the folder...
It's possible to implement simple custom RuboCop cops with very little code. They work exactly the same like existing...
This Capistrano task runs a command on all servers. bundle exec cap production app:run cmd='zgrep -P "..." RAILS_ROOT/log/production.log...
I recently built a screen with a very high and wide table in the center. This posed some challenges:
This card describes different flavors for concatting HTML safe strings in a helper method in Rails. You might want to...
Within a Flexbox layout, there are multiple CSS attributes that may affect a child's basis (the initial width before...
Maintain this feature branch on a regular basis to not get too far behind production. Setup a reminder to either merge the branch or drop it. Inform the colleagues...
In general, you should not put a block element inside an inline element. So don't do this: text
PostgreSQL offers a really handy field type: json. You can store any JSON there, in any structure. While its flexibility...