...you're not familiar with the pattern, read or re-read "New rules for Rails" from Growing Rails Applications in Practice (in our library) How to navigate between indexes, show...
...users.map { |user| [user.id, user.name] }.to_h { 1 => "Alice", 2 => "Bob" } Enumerable#index_by (any Rails version) users = User.all users_by_id = users.index_by(&:id) { 1 => #<User id: 1, name: "Alice...
...User id: 1, name: "Alice">], "Bob" => [#<User id: 2, name: "Bob">] } Enumerable#index_with (Rails 6+) To generate a hash where array elements become hash keys, and values are calculated...
...you're done, check your changes by running rake routes. handle_unverified_request When Rails gets a request with wrong/missing CSRF-Token, it calls ApplicationController#handle_unverified_request and continues...
...processing the request!. Per default, the method only resets the Rails session, but since Clearance doesn't store its session there, you should delete the remember_token cookie. With Clearance...
...app/models/test.rb index eg3c1k1..843c0a2 31143 --- app/models/test.rb +++ app/models/test.rb @@ -19,6 +19,10 @@ module RoutingFilter path = Rails.root / 'app' + if true + + end + return path (1/1) Discard this hunk from worktree [y,n,q...
...your application perform with lots of data? Generate many records per table. Watch the Rails logs and query_diet to find areas of improvement. Reduce N+1 queries, preload associations...
Running rails server will start a local server that you can access via http://localhost:3000. When you are working on multiple web apps, they will likely set cookies with...
...define it in a single place so switching it out will be easy. Modern rails versions will block hosts other than localhost by default. Therefore create an entry in config/environments/development.rb...
...the sudo password with johndoe ALL=(ALL) NOPASSWD: ALL. # Run this script with e.g. `rails runner lib/scripts/benchmark.rb` require 'open3' # For debugging # Rails.logger = Logger.new(STDOUT) # ActiveRecord::Base.logger = Logger.new(STDOUT)
...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...
Rails 6 includes a WYSIWYG editor, Action Text. It works out of the box quite well, but chances are that you want to add some custom functionality. This card contains...
...some tips how to achieve this. Setup Basically, follow the guide in the Rails documentation. The automated script may not work with the way webpacker is configured in your project...
...in webpack.config.js: { ... optimization: { minimize: true, minimizer: [ new TerserPlugin({ terserOptions: { ..., mangle: { properties: { regex: /^[_#]/ } } } }) ] } } Configuring Webpacker (Rails) To configure Webpack to mangle private properties, make a change to your Terser configuration in...
.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...
...like above: new(str, safe_level=nil, trim_mode=nil, eoutvar='_erbout') Difference between Rails mailer and ERB Rails mailer <% if true %> <%= 'bar' %> <% end %> <%= 'foo' %> <%= 'bar' %> bar foo bar
position: relative left: -50% float: left .clear clear: both Together with this helper: # Rails 3 def center_float(&block) concat( content_tag(:div, :class => 'center_float_outer_container') do...
...tag(:div, :class => 'center_float', &block) end end + content_tag(:div, :class => 'clear') ) end # Rails 2 def center_float(&block) html = "".html_safe html << content_tag(:div, :class => 'center_float...
...this requires the PP class from the pp gem. It is loaded in any Rails app already, but for plain Ruby you may need to require it.
This is quite an edge case, and appears like a bug in Rails (4.2.6) to me. Update: This is now documented on Edgeguides Ruby on Rails: If you set the...
...some cases, a viable workaround is to turn your images into inline attachments. Note Rails provides a simple mechanism to achieve this: https://guides.rubyonrails.org/action_mailer_basics.html#making-inline-attachments This documentation makes it look...
...It is recommended to watch for a feature flag, see below. return version unless Rails.config.feature_inline_email_images # `attachments` is provided by Rails, see the linked documentation above # URLs should...
...issues in specific scenarios. Why does this matter? Mocked time in tests Consider a Rails application where you use the remember_me feature of Clearance for authentication. The cookie for...
...feature-binaries commit id: "docs" commit id: "add binaries" type: HIGHLIGHT commit id: "init rails" You are now asked to split up the add binaries commit to one commit per...
...id: "echo binary" type: HIGHLIGHT commit id: "curl binary" type: HIGHLIGHT commit id: "init rails" Exercise 3: Rebase onto a diverged feature branch with merge conflicts %%{init: { 'gitGraph': { 'mainBranchName': 'master...
We recently migrated a Rails application from yarn to npm. We decided to go this step instead of upgrading to > Yarn 2.0 to reduce the number of dependencies in our...
...your yarn.lock (after the first npm install you can relax the constraints again). jsbundling-rails supports NPM since v1.2.2. geordi supports package managers other than yarn since v11.1.0...
The linked article suggests an interesting way to speed up tests of Rails + Postgres apps: PostgreSQL allows the creation of “unlogged” tables, which do not record data in the PostgreSQL...
...the project might need to re-recreate their test databases like so: bundle exec rails parallel:drop && bundle exec rails parallel:prepare
...posts"."user_id" = "users"."id" WHERE (posts.id > 10) Using includes usually works nicely, but Rails will apply some magic, as mentioned at the beginning of this card. This is subject...
...end-to-end test for every small requirement. After we integrated Jasmine into a Rails app we often add an E2E test that opens that Jasmine runner and expects all...
...and decide if any of it needs an update. Your main components (e.g. Ruby, Rails, Unpoly) should always be reasonably up to date. Keeping your dependencies up-to-date is...
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