From at least Rails 4, the ActionView tag helper turns Array values of HTML options into a single space-separated string. This means you can pass an array to :class...
Rails' fragment caching caches subtrees of an HTML document tree. While constructing that tree though, it can be really hard to keep track of whether some code is run in...
...a caching context. Fortunately, Rails 7 brings two helpers that simplify this. Note that these helpers are all about Rails' fragment caching and not about downstream caching (i.e. Cache-Control...
...scope :all_tags, -> (tags){ where('tags @> ARRAY[?]', tags) } end Document.create(title: "PostgreSQL", tags: ["pg","rails"]) Document.any_tags('pg') Document.all_tags(['pg', 'rails']) Migration: class CreateDocuments < ActiveRecord::Migration def change
The :test adapter doesn't respect limits_concurrency configuration. Switch to :solid_queue adapter in your test to verify blocking...
This page lists many query methods and options in ActiveRecord which do not sanitize raw SQL arguments and are not...
Since Rails 7 you are able to encrypt database information with Active Record. Using Active Record Encryption will store an attribute as string in the database. And uses JSON for...
...need to configure your Active Record Encryption keys manually in the config/application.rb: config.active_record.encryption.primary_key = Rails.application.secrets.dig(:active_record_encryption, :primary_key) config.active_record.encryption.deterministic_key = Rails.application.secrets.dig(:active_record_encryption, :deterministic_key) config.active_record.encryption.key_derivation...
...term, you can use PostgreSQL’s trigram similarity search. Writing a fuzzy query in Rails User.where("similarity(name, ?) > 0.3", "John") This finds all users where the name is similar to...
When putting phone numbers into web pages, you should use tel: links so smartphone users can click those numbers to...
...do it, and it's great, especially in combination with Sprockets (or Propshaft on Rails 7). You might be missing some convenience features, though. Here we cover one specific issue...
...Once you have started your development Rails server and esbuild with the --watch option (if you used jsbundling-rails to set up, you probably use bin/dev), esbuild will recompile your...
When your Rails application is using Redis as its cache store, this is how you can list existing keys: Check: Rails.cache should return an ActiveSupport::Cache::RedisCacheStore. Rails.cache.redis.with(&:keys) lists...
When internationalizing your Rails app, you'll be replacing strings like 'Please enter your name' with t('.name_prompt'). You will be adding keys to your config/locales/*.yml files over...
...in any structure. While its flexibility is great, there is no syntactic sugar in Rails yet. Thus, you need to manually query the database. Demo # Given a Task model with...
ActiveModel supplies an errors object that behaves similar to a Hash. It can be used to add errors to a...
So you want to organize your I18n using multiple .yml files but your Rails 4.1 application simply won't use any extra files in development? Spring is to blame.
Just found out about a great feature in Rails that seems to be around since Rails 2. Start a console with the --sandbox (or -s) parameter: rails console --sandbox
In the past we validate and set default values for boolean attributes in Rails and not the database itself. Reasons for this: Older Rails didn't support database defaults when...
An alternative approach, which currently reflects more the general opinion of the Rails upstream on constraints in the database, is adding default values in the schema of the...
...good solution to work around this. When you migrate to managing vendor assets in Rails with Bower, the bower-rails gem comes with its own solution for this problem. It...
...can configure your application to automatically resolve paths before precompiling assets: BowerRails.configure do |bower_rails| # Invokes rake bower:resolve before precompilation. Defaults to false bower_rails.resolve_before_precompile = true
SQL end Usage example: insert_record 'users', name: 'joe', age: 15 Also see Rails: Talking to the database without instantiating ActiveRecord objects...
...a proof of concept how a integration (slightly different as the official docs for Rails) might look like in Rails + webpack + Unpoly. Also see the HN discussion for pro and...
You can use constraints in your routes.rb to avoid getting ActionView::MissingTemplate errors when wrong routes are called. Instead, the...
...gem with strategy :transaction, after_commit callbacks will not be fired in your tests. Rails 5+ Rails 5 has a fix for this issue and no further action is needed...
...Rails 3, Rails 4 Add the gem test_after_commit to your test group in the Gemfile and you are done. You don't need to change the database strategy...
On the Rails console, assigning an object to a variable can lead to this strange error (without stacktrace): irb > recipient = Recipient.find(123) Traceback (most recent call last): TypeError (nil can...
...gem install reline, or in projects with Bundler: gem 'reline', '>= 0.2.0' # Fixes TypeError in Rails console
I have a form with a dynamic number of fields. Submitting it worked fine until I tried out a very...
Just like Ruby Gems tag their version releases to the corresponding Git commit, it can be helpful to track production...