Enable CORS in Rails

gem 'rack-cors'

./bin/bundle install

# frozen_string_literal: true

# Be sure to restart your server when you modify this file.

# Avoid CORS issues when API is called from the frontend app.
# Handle Cross-Origin Resource Sharing (CORS) in order to accept cross-origin AJAX requests.

# Read more: https://github.com/cyu/rack-cors

# Read more: https://github.com/cyu/rack-cors
Rails.application.config.middleware.insert_before 0, Rack::Cors do
  allow do
    origins Rails.application.config.frontend_url

    resource '*',
             headers: :any,
             methods: %i[get post put patch delete options head]
  end
end

Rails.application.configure do
  # other config
  config.frontend_url = '*'
end

Rails.application.configure do
  # other config
  config.frontend_url = ENV.fetch('FRONTEND_URL')
end