When deploying a Rails application that is using Webpacker and Capistrano, there are a few configuration tweaks that optimize the experience. Using capistrano-rails capistrano-rails is a Gem that...
...adds Rails specifics to Capistrano, i.e. support for Bundler, assets, and migrations. While it is designed for Asset Pipeline (Sprockets) assets, it can easily be configured for Webpacker. This brings...
...changelog_path = File.expand_path('../CHANGELOG.md', __dir__) Ruby < 2.0 changelog_path = File.expand_path('../../CHANGELOG.md', __FILE__) Rails changelog_path = Rails.root.join('CHANGELOG.md...
...few examples, where you configure some library via a block. One example is the Rails configuration: Rails.application.configure do |config| config.enable_reloading = false end This card describes a simple example on...
...You can use ActiveSupport::Configurable instead of the Configuration class. When you are using Rails with Zeitwerk and the code for e.g. FooClient lives in a folder, that is loaded...
You don't want sensitive user data in your logs. Background Rails per default filters sensitive data like passwords and tokens and writes [FILTERED] to the logs. The...
...code which is responsible for enabling that usually lives in filter_parameter_logging.rb (Rails.application.config.filter_parameters). Here is an example of a filtered log entry: Unfiltered: `User Load (0.4ms) SELECT "users".* FROM...
...you UTC objects whose to_s(:db) may not convert properly. Legacy behavior in Rails 2.3 It's been briefly mentioned in the random list of ActiveSupport goodies, but please...
...remember to always use Time.current instead of Time.now, etc. Why? Because of the way Rails and MySQL deal with time zones you would need to take care to use Time.zone.now...
...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...
...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.
By default, Rails' validates_uniqueness_of does not consider "username" and "USERNAME" to be a collision. If you use MySQL this will lead to issues, since string comparisons are case...
...may fail with an SQL error due to duplicate index key. You can change Rails' behaviour, by saying class User < ActiveRecord::Base validates_uniqueness_of :name, case_sensitive: false
if 'foo' =~ /foo/ puts $LAST_MATCH_INFO[1] # => foo end Require pitfall in Rails The English library is not loaded by default in Rails. So you or another library...
...piece, but it should be tidy and clear. If you have generated styles from Rails scaffolding, delete them all. They don't look nice and we do not use them...
...remove it and build your own styles from scratch. Tip Up until version 6, Rails understands Sass out of the box. No need to install additional software. Your MovieDB uses...
end html end Full disclosure: Under the hood this uses the private Rails helper method split_paragraphs that simple_format uses. While it might break when upgrading Rails...
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...
...BEM, block-by-block. Read Read the chapter "Taming Stylesheets" from our book Growing Rails Applications in Practice (in our library). Talk with a colleague about the reasons for the...
...a good BEM structure in the DOM tree of these websites: https://makandra.de/ https://railslts.com/ https://www.aitiraum.de/ Practice: Cards In a new project, try to layout the style of...
...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...
# 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...
In Rails, we usually have a mailer setup like this: class MyMailer < ActionMailer::Base def newsletter mail to: 'receiver@host.tld', from: 'sender@host.tld', subject: 'My mail' end end If you want to...
mail = MyMailer.newsletter File.open('my_mail.eml', 'w') { |file| file.write(mail.to_s) } Now, close the rails console and preview the mail: xdg-open my_mail.eml There is not much magic in this...
In modern Rails versions you can also use ActiveRecord's pluck method. User.active.pluck(:id) => [1, 5, 23, 42] If you are plucking from the id column in particular you can...
...not the resulting array). Article.distinct.pluck(:state) # SELECT DISTINCT state FROM articles => ['draft', 'published'] In Rails 3 and 4 you must use uniq instead of distinct: Article.uniq.pluck(:state) # SELECT DISTINCT state...
...is rake good for? Take a look at some of the Rake tasks that Rails gives you (rake -T within a Rails project) Find the code that defines the rake...
...stats task in the Rails gems What are some ways how a Rake task can execute another task? What does it mean if a Rake task "depends" on another task...
...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...
...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...
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...
...for every little thing. Jasmine is a purely client-side tool. It cannot ask Rails to render a view or access the database. Any HTTP calls must be mocked.
Tip Create the required DOM directly from your Jasmine spec. You cannot ask Rails to render a view. You can use Element#dispatchEvent() to emit events on a DOM...
etag { current_user&.id } etag { current_user&.updated_at } end Under the hood, Rails generates an ETag header value like W/"f14ce3710a2a3187802cadc7e0c8ea99". In doing so, all objects from that...
...etag { current_user&.updated_at&.to_f } end You might even want to patch Rails' etagging logic so you don't have to remember doing that. Here you go:
While most Rails Apps are tied to at least one external REST API, machine-to-machine communication via GraphQL is less commonly seen. In this card, I'd like to...
...w[errors]) unless response.status.ok? parsed_response end def client headers = { 'Content-Type' => 'application/json', 'Authorization' => Rails.application.secrets.fetch(:linear_api_key), } HTTP.headers(headers) end end Writing data (Mutation) Performing GraphQL mutations is equally...