On 28 Aug 2010, at 20:32, Anthony Smith wrote:
> Has anybody noticed validates_uniqueness_of missing in rails 3.0 rc2? I'm not
> sure if this is a bug or I'm just doing something wrong.
It's still in there, as far as I can see. If it had been removed, you'd get an
error when you try to call 'validates_uniqueness_of'.
> Here's what I'm doing.
>
> Class 1:
>
> class Title < ActiveRecord::Base
> validates_length_of :language, :is => 3
> validates_uniqueness_of :language, :scope => :book_id
> validate :language, :is_proper_language_code
>
> validates_presence_of :value
>
> belongs_to :book
>
> def is_proper_language_code
> errors.add(:base, "invalid language code") unless
> !ISO_639::ISO_639_2.find{ |lang| lang[0] == self.language }.nil?
> end
> end
>
> Class 2:
>
> class Book < ActiveRecord::Base
> attr_accessible :titles
>
> validates_presence_of :titles
>
> has_many :titles
> end
>
> Spec:
>
> before(:each) do
> @valid_title_attributes = {:book_id => 1, :language => "eng", :value =>
> "..."}
>
> @book = Book.new
> @book.titles.push(Title.new(@valid_title_attributes))
> end
>
> it "should not have multiple titles with same language attribute" do
> @book.titles.clear
> @book.titles.push(Title.new(@valid_title_attributes))
> @book.titles.push(Title.new(@valid_title_attributes))
> @book.should_not be_valid
>
> @book.titles.clear
> @book.titles.push(Title.new(@valid_title_attributes))
> @book.should be_valid
> end
I assume the problem is that "@book.should_not be_valid" is failing? The
uniqueness validator works by querying the database for other matching records.
So if you're just creating titles in memory, and not saving them, the
uniqueness validator won't complain about them. Try changing your 'Title.new's
to 'Title.create'.
Chris
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