...for consumption in browsers. Webpacker is a wrapper around webpack that handles integration with Rails. This is a short introduction. Installation If you haven't already, you need to install...
...x is still current! in your Gemfile. Run bundle install Finally, run bundle exec rails webpacker:install Alternatively, you can add webpacker from the start when creating a new Rails...
This cards describes an example with a Github Client on how to keep your Rails application more maintainable by extracting domain independent code from the app/models folder to the lib...
...scenarios and not limited to API clients. Example Let's say we have a Rails application that synchronizes its users with the Github API: . └── app └── models ├── user │ ├── github_client.rb │ └── sychronizer.rb └── user.rb...
Rails 7.1 added a new method Rails.env.local?. If you want to stub the Rails env correctly, use ActiveSupport::EnvironmentInquirer like this: # check if the value of stubbed_env is valid...
...allow(Rails).to receive(:env).and_return(ActiveSupport::EnvironmentInquirer.new(stubbed_env.to_s...
You can improve your LIKE / ILIKE search queries in PostgreSQL by adding a GIN index with an operate class ("opclass...
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...
dependent: :restrict_with_error and dependent: :destroy both install before_destroy callbacks, and Rails fires them in declaration order. The restricting associations are declared first, so their checks run...
...works when the restricting association can be declared first. A has_many :through cannot: Rails raises ActiveRecord::HasManyThroughOrderError unless the through association is declared after the association it rides on...
When putting phone numbers into web pages, you should use tel: links so smartphone users can click those numbers to...
After an upgrade to rails 7 I noticed that async reindexing jobs of Searchkick were failing for Model.reindex(mode: :async, wait: true): /home/a_user/.rbenv/versions/3.3.0/lib/ruby/gems/3.3.0/gems/searchkick-5.3.1/lib/searchkick/relation_indexer.rb:142:in `block in batch_job': undefined...
...the Ruby code in your specs. But it can shadow your Project model when Rails resolves an association class by name — and it only does so when the two spec...
...Nothing here changes how app/models/** resolves constants. So you need all three at once: a Rails-managed class defined inside an example group, a group whose description camelizes to a...
We are using assignable_values for managing enum values in Rails. Nevertheless Rails is adding more support for enum attributes, allowing to have a closer look at the current feature...
...to our still preferred option assignable_values. Active Record enum attribute interface By default Rails is mapping enum attributes to integers: class Conversation < ActiveRecord::Base enum :status, [ :active, :archived ]
I have a form with a dynamic number of fields. Submitting it worked fine until I tried out a very...
When deleting a record in your Rails app, Carrierwave automatically takes care of removing all associated files. However, the file's container directory will not be removed automatically. If you...
Getting CSS (and JS) live reloading to work in a esbuild / Rails project is a bit of a hassle, but the following seems to work decently well. We assume that...
...you already use a standard "esbuild in Rails" setup, and have an esbuild watcher running that picks up your source code in app/assets and compiles to public/assets; if not change...
...setups. This can become pretty messy. The trick: spin up throwaway controllers with rspec-rails' anonymous controller helper, drive real requests, and classify the response. Simplest possible case
...SomeController isn't sufficient here. It isolates routes. A bare routes.draw mutates the global Rails.application.routes. The helper swaps in a fresh RouteSet and restores it afterwards. It names the subclass...
...together with its child records, like a movie with its showtimes. This lesson covers Rails' nested attributes and how to build and test such forms. Important Work on this lesson...
...records in a single transaction — all of it or nothing. You can explain how Rails form helpers name nested inputs and how those names turn into the nested structure of...
Ever needed to use a global variable in Rails? Ugh, that's the worst. If you need global state, you've probably reached for Thread.current. When you're using Thread.current...
...can specify your preferred version like so: bundle _2.1.2_ update --bundler Older Ruby and Rails cannot use the latest bundler 2 version, so you need to stay on bundler...
...you most likely want to use this in combination with the ActionDispatch::AssumeSSL middleware (Rails >= 7.1). This middleware makes your app assume that SSL terminates at the load balancer and...
...custom middleware to automatically flag all cookies as secure-only In a Ruby on Rails app you can add a middleware that automatically sets the Secure flag to all server...
...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...
ActiveSupport (since 4.1) includes test helpers to manipulate time, just like the Timecop gem: To freeze the current time, use...
...have to either: Sort both the query and database content. If you're on Rails 7.1 you can use the new normalizes macro for this. This solution would still use...
Background information about session storage in Rails Rails has a default mechanism to store the session in the CookieStore. This is a cookie which holds the entire user session hash...
I recently stumbled upon the Rails feature composed_of. One of our applications dealt with a lot of addresses and they were implemented as 7 separate columns in the DB...
...enforced that. Because I used a regular class, I had to build it myself. The Rails-native readonly is sadly only available with ActiveRecord, not with ActiveModel. It would have...
Validations keep invalid data out of your database. This lesson covers Rails' built-in validations, how to test them, and how to show helpful error messages in your forms.
...Work on this lesson in teacher mode. Learning goals You can validate records with Rails' built-in validations and know where to look up the rest. You can explain when...