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ActiveRecord Callbacks

• Way to insert yourself in the process of crreating updating and deleting a record.
• Examples include:

CREATE                  UPDATE                  DESTROY
before_validation       before_validation

-------------------------VALIDATION------------------------------

after_validation        after_validation

before_save             before_save
before_create           before_update           before_destroy

-------------------------DATABASE INTERACTION---------------------

after_create            after_update            before_destroy
after_save              after_save            

• Used in your model classes! Ex: before_save :private_method_name, must be written in the private section of your code!