Spawnling gem:
This gem provides a 'Spawnling' class to easily fork OR thread long-running sections of code so that your application can return results to your users more quickly. It works by creating new database connections in ActiveRecord::Base for the spawned block so that you don't have to worry about database connections working, they just do.
Step 1: Gem add in Gemfile:
gem 'spawnling'
Step 2: Add in database.yml file
production/development:
..............
..............
reconnect: true
Step 3: Usages:
Spawnling.new do
@calendar.send_notification_to_team # method name
end