# Validations in the same Model **URL:** \ **Category:** rubyonrails-talk\ **Created:** [April 26, 2011, 4:35pm UTC](https://discuss.rubyonrails.org/t/validations-in-the-same-model/58670 "2011-04-26T16:35:56Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Junior\_Grossi](https://avatars.discourse-cdn.com/v4/letter/j/dc4da7/32.png) [@Junior\_Grossi](https://discuss.rubyonrails.org/u/Junior_Grossi)\ **Post date:** [April 26, 2011, 4:35pm UTC](https://discuss.rubyonrails.org/t/validations-in-the-same-model/58670/1 "2011-04-26T16:35:56Z")
Hi all, I am newbie in Rails and new at this group. I am with a problem with validation. I searched at Google but I cant see anything. I have just one Model: User. I have 2 CRUD's (controllers and views): Representatives and Users... Users CRUD is ok but Representatives not. I have different validations rules for Representatives and Users, but I have to use the same table in the DB, so the same Model. How can I make different validations in a same Model? Thanks a lot! ---
**Author:** ![Philip\_Hallstrom](https://avatars.discourse-cdn.com/v4/letter/p/bbe5ce/32.png) [@Philip\_Hallstrom](https://discuss.rubyonrails.org/u/Philip_Hallstrom)\ **Post date:** [April 26, 2011, 4:58pm UTC](https://discuss.rubyonrails.org/t/validations-in-the-same-model/58670/2 "2011-04-26T16:58:31Z")
Look into STI (single table inheritance). This will let you use the same underlying table (and share common functionality) among multiple models... -philip ---
**Author:** ![Junior\_Grossi](https://avatars.discourse-cdn.com/v4/letter/j/dc4da7/32.png) [@Junior\_Grossi](https://discuss.rubyonrails.org/u/Junior_Grossi)\ **Post date:** [April 26, 2011, 6:29pm UTC](https://discuss.rubyonrails.org/t/validations-in-the-same-model/58670/3 "2011-04-26T18:29:27Z")
Hi philip!!! Thanks for your reply. I read about STI and solve my problem. BUT now I have another hehe. I have 2 validations rules, because I have a has\_one association. How can I do this? [http://pastie.org/1836266](http://pastie.org/1836266) For example... I have to validate :name (Profile) for Representative, but not for User. Thanks! ---
**Author:** ![Philip\_Hallstrom](https://avatars.discourse-cdn.com/v4/letter/p/bbe5ce/32.png) [@Philip\_Hallstrom](https://discuss.rubyonrails.org/u/Philip_Hallstrom)\ **Post date:** [April 26, 2011, 10:43pm UTC](https://discuss.rubyonrails.org/t/validations-in-the-same-model/58670/4 "2011-04-26T22:43:51Z")
> Thanks for your reply. I read about STI and solve my problem. > > BUT now I have another hehe. I have 2 validations rules, because I have a has\_one association. How can I do this? > > [http://pastie.org/1836266](http://pastie.org/1836266) > > For example... I have to validate :name (Profile) for Representative, but not for User. class Profile... validates :name, :presence =\> {:if =\> lambda {|p| p.representive.present?}} end Or something like that... might need to check the class type instead... that should get you started though. ---
**Author:** ![Junior\_Grossi](https://avatars.discourse-cdn.com/v4/letter/j/dc4da7/32.png) [@Junior\_Grossi](https://discuss.rubyonrails.org/u/Junior_Grossi)\ **Post date:** [April 27, 2011, 12:41pm UTC](https://discuss.rubyonrails.org/t/validations-in-the-same-model/58670/5 "2011-04-27T12:41:53Z")
Thanks! I will try do something like that. s ---
**Author:** ![Junior\_Grossi](https://avatars.discourse-cdn.com/v4/letter/j/dc4da7/32.png) [@Junior\_Grossi](https://discuss.rubyonrails.org/u/Junior_Grossi)\ **Post date:** [April 27, 2011, 4:20pm UTC](https://discuss.rubyonrails.org/t/validations-in-the-same-model/58670/6 "2011-04-27T16:20:28Z")
Just to complete the topic... solved! Solution: validates\_presence\_of :name, :tel\_commercial, :tel\_mobile, :address, :city, :state, :neighborhood,                         :if =\> :representative?   def representative?     lambda {|p| p.representative.present?}   end Thanks philip! s