# One method in several models

**URL:** <https://discuss.rubyonrails.org/t/one-method-in-several-models/61108>\
**Category:** rubyonrails-talk\
**Created:** [October 1, 2011, 1:04pm UTC](https://discuss.rubyonrails.org/t/one-method-in-several-models/61108 "2011-10-01T13:04:42Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![11155](https://avatars.discourse-cdn.com/v4/letter/1/d26b3c/32.png) [@11155](https://discuss.rubyonrails.org/u/11155)\
**Post date:** [October 1, 2011, 1:04pm UTC](https://discuss.rubyonrails.org/t/one-method-in-several-models/61108/1 "2011-10-01T13:04:42Z")

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Let I have several models, and one method that must validate them.

I want to keep my code DRY, so how I must attach code to several models?

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**Author:** ![Everaldo\_Gomes](https://avatars.discourse-cdn.com/v4/letter/e/ea5d25/32.png) [@Everaldo\_Gomes](https://discuss.rubyonrails.org/u/Everaldo_Gomes)\
**Post date:** [October 1, 2011, 1:21pm UTC](https://discuss.rubyonrails.org/t/one-method-in-several-models/61108/2 "2011-10-01T13:21:21Z")

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Hi!

Search for “rails custom validators”

[http://www.perfectline.ee/blog/building-ruby-on-rails-3-custom-validators](http://www.perfectline.ee/blog/building-ruby-on-rails-3-custom-validators)

Best Regards,

Everaldo