Rails Model Callbacks

RailsModelCallbacks.rb

#Validation
:before_validation # Create, Update
:after_validation  # Create, Update

#Database
:before_save       # Create, Update
:before_create     # Create
:before_update     # Update
:before_destroy    # Destroy

:after_create      # Create
:after_update      # Update
:after_destroy     # Destroy
:after_save        # Create, Update