Rails - Jun 2008 - Newbie : Easiest way to validate uniqueness of 2 fields that are related

Hello everyone

Just to be sure, what is the easiest way to validate that a
combination of 2 fields is unique in my model ?


Example :

I have Posts and Comments

A posts can have multiple comments (so post_id is not unique) and
multiple comments can have the same title (title is not unique
either).

But, I don''t want 2 comments from the same post to have the same
title.  How is the easiest way to test that in my Comment model ?


--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

On Jun 21, 8:27 pm, DavidPaquet
<david.paq...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> Hello everyone
>
> Just to be sure, what is the easiest way to validate that a
> combination of 2 fields is unique in my model ?
>
That''s what the :scope option on validates_uniqueness is for.

Fred

--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---