How do I execute a callback only if a specific attribute on the object changes?

Asked May 16 '18 at 07:03

Active May 16 '18 at 07:03

Viewed 48 times

I have a Stock model that has the following callback:

after_save :update_port_stock_current_price

But I only want that executed if the Stock object being saved had the price changed.

How do I detect if a specific attribute, i.e. stock.price has changed in this save?

asked May 16 '18 at 07:03

marcamillion

1

after_save :update_port_stock_current_price, if: -> {self.price_changed?} – Rohan May 16 '18 at 09:07
@Rohan that does work...as does the `ActiveRecord::DirtyModel` stuff in the link to the other SO question that @sawa indicated. – marcamillion May 17 '18 at 19:46

0 Answers0