...an instance of its subclasses or superclass. This is useful because some parts of Rails reflect on the class of an instance, e.g. to decide which partial to render:
...also use Cookies with cURL. For easily making HTTP requests in an IRB or Rails console, take a look at the HTTP gem. If you prefer a GUI, take a...
...saved to database directly as the the dumped object was not marked dirty, thus rails does not see the need to save it, even if the object is not present...
%span Reference %pre ~ content Reference Hello World Textareas In some versions of Haml + Rails, this may also be an issue for textarea elements. Fix it similarly: # Indented description
Webpack is the future. We're using it in our latest Rails applications. For tests, we want to compile assets like for production. For parallel tests, we want to avoid...
...Dir.empty?(public_output_path) end delegate :public_output_path, to: :config private def test? Rails.env.test? end def parallel_tests? test? && !!parallel_tests_number end def parallel_tests_number
...use SimpleForm in your project, I would suggest to regenerate the configuration file with rails generate simple_form:install --bootstrap and merge it with your own customizations instead of only...
...partial_double_verification. This might be handy in case you are testing helpers in Rails, where you sometimes rely on methods defined in the application controller (e.g. current_user and...
...for example, you maintain a gem and want to run automated tests against multiple rails versions. When you need to bundle one of your secondary Gemfiles, the solution above is...
...So might fix this by adding the following lines to your application.rb: class Application < Rails::Application config.time_zone = 'Berlin' # or whatever your time zone end It seems Date.yesterday uses the...
...add the following tests to test suites: # Make sure to require the previews Dir[Rails.root.join('spec/mailers/previews/*.rb')].each { |file| require(file) } ActionMailer::Preview.all.index_with(&:emails).each do |preview, mails|
...animated GIFs. Resizing them can be a time-consuming task and will block a Rails worker until the image is processed. Save yourself that trouble, and simply tell ImageMagick to...
where html_content can be replaced by one of the following commands: Rails body or response.body Capybara: page.driver.html.content page.body Webrat: Nokogiri::HTML(response.body).content The returned strings can...
...need to configure this if you're using system tests with modern versions of Rails. They do exactly the same
...preprocessed: true end end Preprocess this version for all existing records bundle exec rails runner 'User.find_each { |user| user.avatar.variant(:preview).processed }' Use the new variant and deploy
Looks simpler than inaction_mailer: gem install mailcatcher mailcatcher Setup Rails to send mails to 127.0.0.1:1025. Usually you want the following config in config/environments/development.rb and maybe in test.rb or...
...our output will be more verbose than when we only need support modern browsers. Rails 5.1+ projects often use Webpacker to preconfigure the Webpack pipeline for us. The default configuration...
...on to the console IRB. console command: Ctrl + C now properly exits a local Rails console rspec and cucumber commands: Run specs even if the automatic chromedriver update fails
...Follow the instructions in the README. Most likely you want: to add the Ruby, Rails and RSpec cops to include the unit test 2. Report all existing offenses and exclude...
Rails 6.1 has a "strict loading" mode that forces the developer to preload any association they plan to use. Associations no longer load lazily. An error is raised when reading...
...TILs on many topics that might be interesting for most of us. (e.g. Ruby, Rails, Git, Unix..) Ruby Here is an excerpt of all the Ruby TILs that were new...
...config.gem 'chunky_png', :version => '=0.8.0' create config/initializers/compass.rb (or copy from development repo): ^ require 'compass' rails_root = (defined?(Rails) ? Rails.root : RAILS_ROOT).to_s Compass.add_project_configuration(File.join(rails_root, "config...
^ This configuration file works with both the Compass command line tool and within Rails. Require any additional compass plugins here. project_type = :rails project_path = Compass::AppIntegration::Rails.root
If you require your Rails models manually, pay attention to the path you use. Unless you have to, don't do it at all. Background Consider these...
class Foo # something happens here end Now, when your environment is booted, Rails will automatically load your models, like User. In our example, when Foo gets loaded, it...
...mocked with Timecop. To integrate those two, we include and activate timemachine.js in our Rails layout whenever we see that Timecop is mocking the time: - if defined?(Timecop) && Timecop.top_stack...
...for session hashes. Use update instead. Outline Let's assume you're modifying the Rails session. For simplicity, let's also assume your session is empty when you start (same...
...is the ActionController::Session::AbstractStore::SessionHash class (session is of that type in your Rails application, but also in Rack middleware): class SessionHash < Hash # ... def update(hash) load_for_write...