Rails 5 (don't know about the others) comes with an initializer wrap_parameters.rb. Here you can tell rails to wrap parameters send to your controllers for specific formats into a...
...used to when you are dealing with form payloads. This is especially handy because Rails puts some stuff in the params which does not really belong there IMHO. For instance...
ActiveRecord has a feature called counter caching where the containing record in a has_many relationship caches the number of its children. E.g. when you have House has...
...many :rooms, Rails can cache the number of rooms in House#rooms_count. Mind that when a model has a column that looks to Rails like a counter-cache column...
...you need to, probably your whole application should be split up. Split it anyway Rails::Engine looks at config.paths['config/routes.rb'] and registers its value with app.routes_reloader. This means you...
...then require them. However, I recommend to put any routing files into config/routes/: # config/routes/example.rb Rails.application.routes.draw do resources :example end After creating your routing files, tell Rails how to find them...
Rails 3.0 has been underway for a good two years, so it’s with immense pleasure that we can declare it’s finally here. We’ve brought the work of...
Learn everything you need to know about Scaling your Rails app through 13 informative Screencasts produced by Gregg Pollack with the support of New Relic...
There are a bunch of basic functional elements to building out a popular Rails app that I've never really seen explained in one place, but we had to learn...
A thorough introduction to web development with Ruby on Rails
bower-rails is a great solution for managing vendored assets in your Rails app. It feels especially much more convenient and easier to update assets when going this way.
...rails generates a Bowerfile that works much like the Gemfile you're used to. Just specify your dependencies and run rake bower:install. You can find available packages here.
Using beginning_of_day or end_of_day on Date or DateTime objects in Rails 2.x applications will never respect time zones, which is horrible.\ This is fixed in...
...Rails 3, though. Even when using Date.current or DateTime.current you will get regular Time or DateTime objects: >> Date.current.beginning_of_day.class => Time # not a ActiveSupport::TimeWithZone as expected >> DateTime.current.beginning_of_day.class => DateTime # not a ActiveSupport...
...tidy, we recently started to namespace controllers. With the :controller option you can tell Rails which controller to use for a path or resource. For nested resources, Rails will determine...
...following code in routes.rb … resources :users do resource :profile, controller: 'users/profiles' #[1] end … makes Rails expect the following directory structure: app/ controllers/ users/ profiles_controller.rb users_controller.rb ... views/ users/ profiles/ show.html.haml index.html.haml...
If you need to enable NewRelic monitoring on certain machines within the same Rails environment, a simple solution is to utilize the respective hostnames of you machines. For example, if...
...CustomNewRelicConfiguration.enable_on_current_host? %> FYI: The newrelic.yml config file is ERB parsed when the Rails environment is booted, CustomNewRelicConfiguration.enable_on_current_host? gets evaluated and NewRelic is enabled on the...
When CoffeeScript was added to Rails 3.1 they forgot one very important part, the ability to use it when responding to JavaScript (JS) requests! In Rails 3.1 it’s incredibly...
I have been playing around with RESTful Rails recently. Below is my collection or Rails REST howtos, tutorials and other resources I have found so far...
ObjectiveResource is an Objective-C port of Ruby on Rails' ActiveResource. It provides a way to serialize objects to and from Rails' standard RESTful web-services (via XML or JSON...
There are many wonderful things about Rails and the Rails ecosystem. A clean, well-lighted path for keeping all your extensions up to date is not one of them...
This is a visualization of the files that will be generated by some useful rails generators. Invoke a generator from command line via rails generate GENERATOR [args] [options]. List all...
...generators (including rails generators) with rails g -h. generator model migration controller entry in routes.rb views tests scaffold ✔ ✔ ✔ ✔ ✔ ✔ resource ✔ ✔ ✔ ✔ ✔ model ✔ ✔ ✔ controller ✔ ✔ ✔ migration ✔ Also see this blog post...
...maybe the rubygems-bundler that RVM supplies by default) no longer working on old Rails versions (it seems to work on applications running on Rails 3.2 + Ruby 1.8.7).
...sitemap.xml' => 'feeds#sitemap', :constraints => { :format => 'xml' }, :as => 'sitemap' The mistake is to match sitemap.xml. Rails will by default strip any dot-anything, remember it as desired format and forward the...
...making .xml part of the match, it is not available for format determination and Rails will set the format to html. Unfortunately, the constraint won't complain in this case...
...but install the version from the webpage instead. Get Bundler: sudo gem install bundler Rails and other gems for a project should now be installed via bundle install from the...
...project directory. If you need Rails and don't have a Gemfile you can do it old-school: sudo gem install rails -v=2.3.12. You will also need Ubuntu development...
The most obvious way to use spring is to call it explicitly: spring rails console spring rake db:migrate Binstubs Binstubs are wrapper scripts around executables. In Rails they...
...all, your binstubs will be using Spring. bin/rails console bin/rake db:migrate bundle exec rails ... Bundle exec is inconsistent when it comes to spring. Some commands will use it, some...
There are a few ways to access view helpers from the Rails console. The easiest way is the helper shortcut: helper.translate 'i18n.string' helper.your_helper_method If the desired helper renders...
...a view template, you need this setup: view_paths = Rails::Application::Configuration.new(Rails.root).paths["app/views"] av_helper = ActionView::Base.new(view_paths).extend YourHelperModule av_helper.your_helper_method
Starting with Rails 4.0, when you get an exception reported via the ExceptionNotification gem, you will only see a very short backtrace with all backtrace lines from gems or ruby...
...libraries missing. This happens, because the ExceptionNotification gem uses Rails' default backtrace cleaner. To get a full backtrace in exception emails, you can remove the comment from this line in...
In Rails 3.1+, instead of defining a separate up and down method you can define a single method change: class AddComparisonFieldsToReport < ActiveRecord::Migration def change add_column :reports, :compare, :boolean...
...additional step to keep your cookies valid. Issue Sidekiq::Web is mounted into your Rails application and will use the Rails session cookie for protection from CSRF attacs. While it...
...Sidekiq::Web like this: # config/initializers/sidekiq.rb require 'sidekiq/web' Sidekiq::Web.set :sessions, domain: <domain here, e.g. Rails.configuration.x.cookie_domain...