Rails - Aug 2010 - validates_uniqueness_of missing in rails 3.0 rc2?

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.

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

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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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