Realtime Partial Update App

This is a sample of how to use ActionCable & Stimulus to update partials in Rails 6.

Key files

• config/cable.yml - I setup the local adaptor to be redis so ActionCable will work locally.
• app/javascript/controllers/realtime_partial_controller.js - The Stimulus controller for making a partial update when being updated via ActionCable.
• app/views/comments/index.html.erb - The adjustment to the view I added to make the Stimulus controller activate.
• app/jobs/partials/comments/list_job.rb - The ActiveJob where I broadcast the updated partial via ActionCable.
• test/system/comments/realtime_partials_test.rb - The system test for the realtime partials.

Setting up locally

Pull down the repo & run:

brew install redis
./bin/setup

• brew install redis You will need redis installed on your local machine & have it running for ActionCable to work.
• bin/setup - runs bundler & yarn, then sets up the database.

Next you should be able to run:

rails s

To turn on the server, your port may vary but if you visit http://localhost:3000/comments you should be able to see the realtime updates when CRUD'ing objects.