...shoulda-matchers gem gives you some RSpec matchers to test the application of standard Rails validations. Under the hood should-matchers uses the same recipe as outlined above (set invalid...
...screen_name is not a palindrome. Since that check is not possible with standard Rails validations, we write a custom validation method like this: class User < ActiveRecord::Base validate :validate...
...add support for parallel tests. You can easily do that by setting config.root: config.root = "#{Rails.public_path}/system/#{Rails.env}#{ENV['TEST_ENV_NUMBER']}".freeze For debugging purposes (e.g. trying to hunt...
...separate environment. You you could read from an ENV variable instead of using your Rails.env. Suggested configuration In total, here is a suggested configuration that you can put into config/initializers/carrierwave.rb...
...comparison can often be seen with simple string comparison like so. # ❌ Not recommended if Rails.version > '6.1.7.8' || RUBY_VERSION > '3.1.4' raise Error, 'please check if the monkey patch below is still...
...comparison above works by coincidence. But chances are that you are not: For example, Rails version 6.1.10.8 would not raise an error in the code block above, because in an...
...of form.fields_for. You forgot to use accepts_nested_attributes in the containing model. Rails won't complain, but nothing will work. In particular, nested_form.object will be nil.
You are not setting the inverse_of for a has_many through association. Rails will then not be able to process a collection assignment, since it can't find...
...config/initializers/searchkick.rb (or wherever you have configured your Searchkick settings) add: SEARCHKICK_CLIENT_TYPE = case Rails.env when 'production', 'staging', 'development', 'test' :elasticsearch else :opensearch end Searchkick.client_type = ENV.fetch('SEARCHKICK_CLIENT_TYPE...
...SEARCHKICK_CLIENT_TYPE).to_sym ENV['OPENSEARCH_URL'] ||= case Rails.env when 'production' OPENSEARCH_PRODUCTION_SERVER when 'staging' OPENSEARCH_STAGING_SERVER else 'http://opensearch:9200' # docker container name end
...a named scope like Post.active and use that. Learn Resources Active Record Query Interface Rails Database Best Practices ActiveRecord: Specifying conditions on an associated table Preload, Eagerload, Includes and Joins...
...Battling n+1 Queries in Rails Tips Preventing scopes from loading A scope like User.where(email: 'foo@bar.com') does not make an SQL query. It simply returns a scope object for...
...model validation that restricts its length. There are two motivations for this: In modern Rails, database types :string and :text no longer have a relevant size limit. Without a validation...
...malicious user can quickly exhaust the hard drive of your database server. In legacy Rails (or database schemas migrated from legacy Rails), database types :string and :text had a database...
Recent rails security updates have shown that people make incorrect assumptions about the possible contents of the params hash. Just don't make any! Treat it as what it is...
.../pages/edit?foo --> params == {:foo => nil} /pages/edit?foo[] --> params == {:foo => [nil]} # at least in older rails 3 and in rails 2.x Be especially wary about stuff like User.find_by_password...
Understand how nested attributes appear in the params. See how the Rails form helpers encode the names of nested inputs. Understand how the record and all of its nested...
...saved in a transaction. That means the entire structure is saved or not. Resources Rails Guide: Nested forms Nested Forms in Rails Popular mistakes when using nested forms When aggregating...
...All you need is a pretty print-stylesheet. How to use it from your Rails application You can have PDFKit render a website by simply calling PDFKit.new('http://google.com').to...
...separately before calling to_file. Alternatively you can use PDFKit::Middleware and all your Rails routes automagically respond to the .pdf format. This is awesome to get started fast, but...
...but give sub-classes a way to override values without affecting the parent class. Rails has many helpers for this such as class_attribute and class_inheritable_accessor. Unfortunately their...
...semantics are hard to understand, the helpers available differ for different versions of Rails and the behavior is subtly different. Make sure you read and understand the API before using...
Note that when your app is a web app, the console running your rails server will pause the server and show the debugging console. Your browser will "hang" while...
If you need to debug code that is part of a gem like rails, just (temporarily) add a puts or debugger statement to its source files. Ruby is an...
...runs; Code Reviews include test badge; Automatically merge a PR on green tests Upgrade Rails 5 0 - 5 New Rails features are accessible Replace slider framework 4 4
...load associated records if you know you need to access them later on. The Rails docs say: Eager loading is supported with polymorphic associations. This is true, but has some...
...and include their current versions' primary media... Page.includes(:current_version => :primary_medium).to_a ... Rails will produce 4 queries: Page Load (0.7ms) SELECT "pages".* FROM "pages" PageVersion Load...
...animation: none !important; } To only include these styles for tests, see Detect the current Rails environment from JavaScript or CSS. Disabling animations in Unpoly In Unpoly you can globally disable...
...argument('--disable-smooth-scrolling') Related cards Does or scroll the page? Detect the current Rails environment from JavaScript or CSS Disable concurrent AJAX requests in tests In applications that do...
simple_format ignores Rails' XSS protection. Even when called with an unsafe string, HTML characters will not be escaped or stripped! Instead simple_format calls sanitize on each of the...
...you need to escape yourself: simple_format(h(user_input)) If you're using Rails 7.1 you can also customize your sanitize opions that simple_format uses. E.g if you...
Rails applications and ruby gems should have a README that gives the reader a quick overview of the project. Its size will vary as projects differ in complexity, but there...
...be written atop the class file. Structure I suggest the following outline for a Rails project's README, using the very readable Markdown language: # App title Describe the whole project...
Accept: application/json This means the client will only understand JSON responses. When a Rails action is done, it will try to render a template for a format that the...
...pages/foo, application/foo with {:locale=>[:de], :formats=>[:json], :handlers=>[:erb, :builder, :haml]} This is because Rails tried to find a template like foo.js.erb but all it found was foo.html.haml (which the...
...ALLOW_REMOTE_DATABASE_URL: 'true' DATABASE_URL: postgres://postgres:postgres@localhost:5432/test PGTZ: 'Europe/Berlin' RAILS_ENV: test TZ: 'Europe/Berlin' strategy: matrix: partition: [ 0, 1, 2, 3 ] # Keep in sync with...
...uses: actions/checkout@v4 - uses: ./.github/actions/setup-node - uses: ./.github/actions/setup-ruby - name: Setup database schema run: bundle exec rails db:create db:schema:load - name: Precompile assets run: bundle exec rails assets:precompile
Rails has always included a scaffold script that generates a default controller implementation for you. Unfortunately that generated controller is unnecessarily verbose. When we take over Rails projects from other...
...We prefer a different approach. We believe that among all the classes in a Rails project, controllers are some of the hardest to test and understand and should receive special...
The same applies to files in Carrierwave. Variant: Deliver attachments through Rails The first way is to store Paperclip attachments not in the default public/system, but in...
...can be configured like this: class Note < ActiveRecord::Base has_attached_file :attachment, :path => ":rails_root/storage/:rails_env/attachments/:id/:style/:basename.:extension" end To link to the protecting controller actions...
...to be released when the block ends. Example: RSpec::Mocks.with_temporary_scope do allow(Rails).to receive(:env).and_return('production'.inquiry) puts Rails.env # prints "production" end puts Rails.env # prints...
content_type_1.match(/\Aimage\/(jpeg|png)\z/) # => nil content_type_2.match(/\Aimage\/(jpeg|png)\z/) # => Rails Newer Rails explicitly warns you, when you use ^ and $ in validations with a regular expression...
...creation if you're on a POSIX system. If you are using Ruby on Rails, a use case / implementation might look like Rails 3: Sending tempfiles for download.