Comments on: Multiple scopes with validates_uniqueness_of in Rails http://emergent.urbanpug.com/?p=72 Order from disorder - Thoughts about where technology is going. Tue, 10 Mar 2015 22:09:43 +0000 hourly 1 https://wordpress.org/?v=4.2.38 By: Cameron http://emergent.urbanpug.com/?p=72&cpage=1#comment-18553 Fri, 28 Dec 2007 05:52:49 +0000 http://emergent.urbanpug.com/?p=72#comment-18553 I think that using validates_uniqueness_of :widget_id, :scope => [ :size, :store_id ] works just fine — but it seems to fail silently. Creating the validate_on_create function as you are showing would at least raise an error message.

]]> By: Andrew Grimm http://emergent.urbanpug.com/?p=72&cpage=1#comment-14271 Sun, 14 Oct 2007 05:07:16 +0000 http://emergent.urbanpug.com/?p=72#comment-14271 After spending an hour or so googling for an answer, I decided to just try the equivalent of


validates_uniqueness_of :widget_id, :scope => [:store_id, :size]
validates_uniqueness_of :store_id, :scope => [:widget_id, :size]
validates_uniqueness_of :size, :scope => [:store_id, :widget_id]

and see if it worked. And for me, using a recent version of everything, it did.

YMMV.

]]> By: Andrew Grimm http://emergent.urbanpug.com/?p=72&cpage=1#comment-14265 Sun, 14 Oct 2007 04:04:27 +0000 http://emergent.urbanpug.com/?p=72#comment-14265 I’m new to RoR, but why are you using validate_on_create rather than validate?

]]> By: Emergent Properties » Rails and the MySQL Unique Index with validates_uniqueness_of http://emergent.urbanpug.com/?p=72&cpage=1#comment-714 Thu, 22 Jun 2006 21:26:55 +0000 http://emergent.urbanpug.com/?p=72#comment-714 […] Update: I’ve corrected some of my misconceptions about using multiple scopes with one validates uniqueness of.  Read the article. […]

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