# How to check if an attribute has changed?

**URL:** <https://www.ruby-forum.com/t/how-to-check-if-an-attribute-has-changed/190095>\
**Category:** Rails\
**Created:** [June 14, 2010, 8:38pm UTC](https://www.ruby-forum.com/t/how-to-check-if-an-attribute-has-changed/190095 "2010-06-14T20:38:52Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![kinunt](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/7c8e57/32.png) [@kinunt](https://www.ruby-forum.com/u/kinunt)\
**Post date:** [June 14, 2010, 8:38pm UTC](https://www.ruby-forum.com/t/how-to-check-if-an-attribute-has-changed/190095/1 "2010-06-14T20:38:52Z")

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I have read about dirty object but I’m not sure if they are still  
present or recommended in Rails.

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**Author:** ![kinunt](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/7c8e57/32.png) [@kinunt](https://www.ruby-forum.com/u/kinunt)\
**Post date:** [June 14, 2010, 9:22pm UTC](https://www.ruby-forum.com/t/how-to-check-if-an-attribute-has-changed/190095/2 "2010-06-14T21:22:56Z")

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Juan K. wrote:

> I have read about dirty object but I’m not sure if they are still  
> present or recommended in Rails.

[http://api.rubyonrails.org/classes/ActiveRecord/Dirty.html](http://api.rubyonrails.org/classes/ActiveRecord/Dirty.html)

I use these quite a bit.

– greg willits