RSpec.configure do |config| config.include Aegis::Matchers end In very old versions of Rails and RSpec you need to do this instead: ActiveSupport::TestCase.send :include, Aegis::Matchers
The Rails secret_token must be unique for each application and any instance of it. If not, someone could exploit this by creating a user with ID = 1 (e.g. on...
...current production users, leaving the production token unchanged: prefix the existing secret_token with #{Rails.env unless Rails.env.production?}. Note: There may be tokens in single quotes that include backslashes, double quotes...
...already shipping as custom elements For example Trix from Basecamp (integrated as ActionText in Rails 6). By choosing custom elements as their delivery method, they work in all JavaScript frameworks...
...alotting time. This is a refactoring similar to removing resource_controller (but not a Rails upgrade). Grep for $. This will show you all the affected lines of code. Refactor functions...
...already know. Just ask. Code smells and refactoring ▶️ All the Little Things — Sandi Metz, RailsConf 2014; turning a knot of conditionals into small objects, step by step 📘 Ruby Science — thoughtbot...
...free PDF; a catalog of Rails code smells, each with the refactoring that fixes it 📄 Code smells and the refactoring catalog — the vocabulary: feature envy, long parameter lists, inappropriate intimacy...
...method is defined even when metaprogramming defined it, e.g. with Method#source_location, the Rails API docs or your IDE. You can write a monkey patch that wraps an existing...
...keyword args in Ruby 3.0 — our card: why argument forwarding needs care 📄 ActiveSupport::Concern — Rails API docs: what it adds to a plain module 📄 Modularity — our gem for parameterized modules...
...up repetitive expectations in your specs. Unfortunately the default directory structure generated by rspec-rails has no obvious place to put custom matchers or other support code. I recommend storing...
...to all specs, put the following into your spec_helper.rb, above the RSpec.configure block: Dir[Rails.root.join("spec/support/**/*.rb")].sort.each {|f| require f} Also see where to put shared example groups...
...collectiveidea.com/blog/archives/2012/01/27/testing-file-downloads-with-capybara-and-chromedriver module DownloadHelpers TIMEOUT = 10 module_function def download_path download_path = Rails.root.join("tmp/test_downloads#{ENV['TEST_ENV_NUMBER']}") FileUtils.mkdir_p(download_path) download_path end def clear_downloads FileUtils.rm...
Zeitwerk is the new autoloader of Rails. It is mandatory starting with Rails 7.0. Sometimes, a model needs to know all its descendants. They might be organized in a subdirectory...
...needs to iterate all design subclasses. To eager load all designs, use this line: Rails.autoloaders.main.eager_load_dir(Rails.root.join 'app/models/design') Make sure that app/models/design.rb is not required manually before instructing Rails...
...the same object. You also know that you can reload an association to make Rails load its data from the database again. user.posts.reload # discards cache and reloads and returns user.posts...
...reset returns the association/scope. Hence, the above will not seem to work on the Rails console, just because the return value is inspected and thus resolved right away.
...check Nokogiri::VersionInfo.instance.warnings for any warnings (though they should appear e.g. when launching a Rails console) or Nokogiri::VersionInfo.instance.to_hash to view more information. Note If your application uses Spring...
...point over a separate ClassMethods module inside of your module. If you are using Rails (or only ActiveSupport), you may also use ActiveSupport::Concern which facilitates this for you.
...taken in chronological order, you get this: Singleton class Class Included modules Superclass(es) Rails 5 introduced prepended modules which allow you to patch methods in a class in a...
Most web applications contain several examples of state machines, including accounts and subscriptions, invoices, orders, blog posts, and many more...
XPath matchers can be combined with CSS-selector matchers. This is really useful if not, for example, the content of...
When your Rails controller action responds with only a simple text, render text: 'Hello' may not be what you want. You should not even use it on Rails 4.1+ any...
By default, a "text" response from a Rails controller will still be a sent as text/html: render text: 'Hello' response.body # => "Hello" response.content_type # => "text/html" While this may not be...
SOURCE foo.dump \i foo.dump Further reading How to setup Ruby on Rails with PostgreSQL Connect to a Rails database with bin/rails dbconsole -p...
...without changing the return value: def save_user user.save.tap do |saved| next unless saved Rails.log("User was created, we have #{user.count} users now!") end end save_user # User was created...
...an unsubscribe token Each user needs a token that allows them to unsubscribe securely. Rails' signed_id works well for this: class FrontendUser < ApplicationRecord # ... def unsubscription_token return unless persisted...
.sort_by(&:last) .to_h end end Just paste that snippet into a Rails console and use #count_by now! Usage examples Number of email addresses by domain: > User.all.count...
...Article.all.count_by &:brand Note that the last simple example can also be achieved with Rails internals: Article.group(:brand).count. This translates to SQL, so it executes fast. However, grouping is...
Rails ships with two separate build pipelines: Sprockets ("asset pipeline") and Webpacker. Webpacker has many more moving parts, but allows us to use ES6 modules and npm packages (through Yarn...
...stack of tools. Start this card by skimming over the linked resource. Discussion Growing Rails applications in practice Read the following chapters from our book Growing Rails Applications in Practice...
...On following fashions Surviving the upgrade pace of Rails Owning your stack Discuss each chapter with your mentor. The Swinging Pendulum The XKCD about the sandboxing cycle is quite on...
Params are tricky Testing for request params is a little tricky because Rails hides details about how HTTP works. In particular GET requests encode their params in the URL...
Rails Active Support provides some helpful methods for calculating times and dates, like Duration#ago or Duration#from_now. But beware when using those, because they wont give...
...timezone unaware. Moreover, you have to be aware that ActiveSupport::TimeWithZone does not use Rails.application.config.active_record.default_timezone, which you need to define, even if you only use your local timezone, but...
# Redis db#1 is used for development. db_number = 1 if rails_env == 'test' normalized_test_number = [ENV['TEST_ENV_NUMBER'].to_i, 1].max db_number += normalized...
end db_number end def port case rails_env when 'staging' # when 'production' # else 6379 # default Redis port end end def rails_env defined?(Rails) ? Rails.env : ENV['RAILS...
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