Rails Online

What is callback in rails ? Callbacks are methods that get called at certain moments of an object's life cycle. With callbacks it is possible to write code that will run whenever an Active Record object is created, saved, updated, deleted, validated, or loaded from the database. What is the difference between after create and after save ? Ans: after_create  only works once - just after the record is first created. after_save  works every time you save the object - even if you're just updating it many years later So if you want to do this email operation only just the once (and then never again) then use  after_create . If you want to do it  every  time the object is saved, then do it in  after_save after_create() Is called after Base.save on new objects that haven‘t been saved yet (no record exists). after_save() Is called after Base.save (regardless of whether it‘s a create or update save)