Using no transactions for js request specs (may not work, just a prototype I do not want to loose...)

gistfile1.rb

# js-request tests cannot use transactions, since they happen in another process
# so if we are in js request tests, use the real test database and then clean it afterwards

module ActiveRecord
  module TestFixtures
    def run_in_transaction_with_js?
      return false if $disable_transactions
      run_in_transaction_without_js?
    end
    alias_method_chain :run_in_transaction?, :js
  end
end

RSpec.configure do |config|
  config.around do |block|
    if example.metadata[:js]
      $disable_transactions = true

      block.call
      $disable_transactions = false

      # kill everything
      DatabaseCleaner.clean_with(:truncation)

      # reload all fixtures for next test
      ActiveRecord::Fixtures.reset_cache
      fixtures_folder = File.join(Rails.root, 'test', 'fixtures')
      fixtures = Dir[File.join(fixtures_folder, '*.yml')].map {|f| File.basename(f, '.yml') }
      ActiveRecord::Fixtures.create_fixtures(fixtures_folder, fixtures)
    else
      block.call
    end
  end
end