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

If you want to get value of particular field after update you can use field_before_last_save method.

Example:

u = User.last
u.update(name: "abc")

u.name_before_last_save will give you old value (before update value)