Using ActiveRecord, is there a way to get the old values of a record during after_update

Question

Setup using a simple example: I\'ve got 1 table (Totals) that holds the sum of the amount column of each record in a second table (

Answer 1

From Rails 5.1, the behavior of attribute_was inside of after callbacks have change. attribute_was will return the value after the save is done and return the current value in an after_save or after_update callback.

attribute_before_last_save is invoked two ways to get the previous value of a field in the after_save and after_update callbacks right now:

Option #1

attribute_before_last_save('yourfield')

Option #2

*_before_last_save