...image running the headless Chrome (e.g. chrome:4444) The integration test is testing a Rails application (but it could be any other application, too) Start your integration test docker container...
...object-oriented scripting language Ruby rubymine 2018.3.2 jetbrains✓ classic The Most Intelligent Ruby and Rails IDE ... Switch channel and install most recent version: $ sudo snap refresh rubymine --channel=2018.2/stable...
...Stefan', color: 'red'} ] names = users.collect do |user| user[:name] end If you're using Rails 5+, this example is covered by Enumerable#pluck (users.pluck(:name)). But with a little extension...
Your after_commit callbacks will not know about changes, as Rails discards them when committing. The linked article shows a clever trick to work around that: It uses an after...
...commit, and not after_save. Enqueueing a Sidekiq job is just one of them. Rails 5+ You can use saved_change_to_attribute? and previous_changes[:attribute] in after_commit...
...up on the disk check table sizes by disk usage instead. Connect to a Rails database with bin/rails dbconsole -p...
Note that you cannot currently use Ruby 1.9.2 with Rails 2 applications that use RSpec, so don't upgrade if that is your setup. The rspec-rails gem has a...
...fatal bug that was only fixed for rspec-rails-2.x, which only supports Rails 3. There is no fix for the rspec-rails-1.3.x series of the gem...
...use the String#strip_heredoc method from ActiveSupport. See Summarizing heredoc in ruby and rails for an example. Technically, it looks for the least indented line in the whole string...
Rails comes with grouped_collection_select that appears to be useful, but isn't. As an alternative, consider the flat_grouped_collection_select found below. It takes a third argument...
...For newer Ruby versions, use form_with_development_errors.rb. This monkey patches both form_for and form_with. Rails-XSS is required by default. So if your project doesn't support Rails-XSS...
...like app/inputs/grouped_collection_select_input.rb (SimpleForm will pick it up automatically; if it does not, restart your Rails server) and use it in your form with that new :group_by option.
If you migrate a Rails application from Sprockets to Webpack(er), you can either transpile your CoffeeScript files to JavaScript or integrate a CoffeeScript compiler to your new process. This...
...code is causing an exception which is not the one shown in your terminal. Rails tries to catch this exception and clean up constants but -- while it's still booting...
Have a look at the environment's log file instead Open up a Rails console (may give you more information than the logs) If you're lucky it's...
...This is why we don't use "transactional fixtures" in our Cucumber tests, which Rails by default uses to clean up the database after each test. Instead we use DatabaseCleaner...
Rails comes with a Rake task notes that shows code comments that start with "TODO", "FIXME", or "OPTIMIZE". While it's generally not good practice to leave them in your...
app/helpers/frontend/slider_helper.rb: * [48] [TODO] this is only temporary till frontend is done However, with Rails' default configuration this task will only look through default file extensions, like .rb, .erb, .css...
Adding the asset cache directory to symlinked directories Popular asset managers for Rails are Sprockets and Webpacker. Both keep a cache of already compiled files that we're...
...for easily adding new commands many little niceties New commands setup: set up a Rails project for the first time (bundle install, create database.yml, create databases, migrate), optionally run all...
...update by pulling/pushing/merging and deploying just as our workflow is devserver: boot a development server Rails-version-agnostic console: open a local Rails console Rails-version-agnostic, or remotely, e.g...
...you already have stored files in the old structure) Checklist: Using Carrierwave in a Rails project
...is to "vendor" the gem by copying it into the vendor/gems directory of your Rails project. You can then make any changes you require and Rails will use the vendored...
...after a server restart. Unfortunately you need to perform some additional steps to marry Rails and the copied gem. This notes describes what to do. With Bundler
tl;dr: Always have your attachment path start with :rails_root/storage/#{Rails.env}#{ENV['RAILS_TEST_NUMBER']}/. The directory where you save your Paperclip attachments should not look like this: storage/photos/1...
...storage/test/photos/1/... storage/test/photos/2/... storage/test/attachments/1/... storage/test/attachments/2/... storage/test2/photos/1/... storage/test2/photos/2/... storage/test2/attachments/1/... storage/test2/attachments/2/... In order to implement this, make Rails.env and ENV['RAILS_TEST_NUMBER'] part of your path template: has_attached_file :attachment, :path...
...uses mocha. This note shows to use RSpec stubs and mocks instead. Rspec 1 / Rails 2 Put the following into your env.rb: require 'spec/stubs/cucumber' Rspec 2 / Rails 3
...page for more information on calculating sizes of databases or tables. Connect to a Rails database with bin/rails dbconsole -p...
Test one codebase against multiple sets of gem dependency sets (e.g. Rails 4.2, Rails 5.0). Test one codebase against multiple Ruby versions (e.g. Ruby 2.1.8, Ruby...
...possible dependency permutations (Ruby, gem set, database type). Manually exclude incompatible dependency permutations (e.g. Rails 5.0 does not work with Ruby 2.1). Let developers enter their local credentials for MySQL...
If you want to make your Rails application be capable of sending SMTP emails, check out the action mailer configuration section in the Ruby on Rails guide.
...in your environment or individually applied to an email generated in your mailer: # production.rb: Rails.application.configure do config.action_mailer.delivery_method = :smtp config.action_mailer.smtp_settings = smtp_settings end # test_mailer.rb def test_mail
...them, this is fortunately made very easy if you use compass. Simple example for Rails 3+ Let's assume you have two images app/assets/images/layout/blue-button.png, and .../blue-button-hover.png and the following sass...
...not there already, add this to the :assets group in your Gemfile: gem 'compass-rails' gem 'oily_png' Run bundle install. Add a config/compass.rb with the following content: