If you’re reading this, you’re probably confused why the helper functions in helpers/application_helper.rb aren’t working within your Shopify app.
My favorite fix for this is to add a small snippet of code to config/application.rb:
config.to_prepare do ShopifyApp::AuthenticatedController.helper ShopifyRoRAppName::Application.helpers end
It is very important to replace the ShopifyRoRAppName with your own RoR app’s name. For reference, it should be right above where you place the code: