...obtain a explicit row lock ("pessimistic lock") within a transaction. ActiveRecord::Base.transaction do # old Rails versions: obj = Mode.find(23, { lock: true }) obj = Model.lock(true).find(23) ... end and ActiveRecord will...
...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...
...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)
When a user shares your content, a snippet with title, image, link and description appears in her timeline. By default...
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...
...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.
...consume GBs of memory bringing down our servers. The solution Just use .preload instead. Rails will use separate queries to preload the data. This cannot lead to a cross product...
...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...
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...
...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...
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...
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...
job_id: job.job_id, executions: job.executions, queue_name: job.queue_name, url: url, }, ) end Rails.application.configure do # Also capture errors not handled by Active Job config.good_job.on_thread_error = ExceptionNotifier.method(:notify_exception...
...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...
...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...
When your Rails application server raises error, Capybara will fail your test when it clears the session after the last step. The effect is a test that passes all steps...
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
...resources. The spec looks very similar to how one would build an API with Rails and uses similar patterns. Even if you don't plan on supporting the whole spec...
...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...
...are libraries like morphdom (as used by Phoenix Liveviews) or idiomorph (as used by Rails' Turbo). It lets you write morphdom(node, newHtml) or Idiomorph.morph(node, newHtml) which will try...
...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...
...a lib/ext/super_client.rb to your project (see How to organize monkey patches in Ruby on Rails projects) Add the extension, which overrides both methods (prepend is available since Ruby >=2)
...are verified. Note that this is enabled by default when you are using rspec-rails along with verifying doubles. So if you really need to verify some dynamically defined methods...
...will see less noise in your test output: if RSpec.configuration.files_to_run.count > 5 require "simplecov" SimpleCov.start 'rails' end See also How to use Simplecov to find untested code in a Rails project...