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Description: Fork of DataMapper 0.3 with patches to fix major show-stopping bugs
Clone URL: git://github.com/cardmagic/dm-works.git 
Added a nil? method to HasManyAssociation::Set. Mimics AR, and gives a 
nicer syntax for end users

git-svn-id: http://datamapper.rubyforge.org/svn/trunk@642 
b9f95e1d-c398-435d-95f5-378b83d2b11d
chrononaut (author)
Fri Dec 28 02:46:59 -0800 2007
commit  4454d3dcba9d86569a5315aef1f9a03b1fdf48a5
tree    2551c2223234847f4ed70dc48f136189d651f297
parent  c7ccb47bd01fd8b508ae9a3647ae5b2be9138de9
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CHANGELOG 
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@@ -138,4 +138,8 @@
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 * Added private/protected properties
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 * Remove HasOneAssociation, Make HasManyAssociation impersonate has_one relationships
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 * Added #get method
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-* Persistence module added, inheriting from DataMapper::Base no longer necessary
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\ No newline at end of file
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+* Persistence module added, inheriting from DataMapper::Base no longer necessary
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+
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+-- 0.3.0
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+* HasManyAssociation::Set now has a nil? method, so we can do stuff like cage.animal.nil?
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+
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lib/data_mapper/associations/has_many_association.rb 
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@@ -34,6 +34,11 @@ module DataMapper
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         include Enumerable
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+        # Returns true if the association has zero items
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+        def nil?
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+          @items.empty?
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+        end
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+        
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         def dirty?
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           @items && @items.any? { |item| item.dirty? }
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         end
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spec/associations/has_many_association_spec.rb 
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@@ -27,6 +27,7 @@ describe DataMapper::Associations::HasManyAssociation do
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     project = Project.new
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     project.sections.should be_a_kind_of(Enumerable)
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     project.sections.should be_empty
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+    project.sections.should be_nil
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   end
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   it "should display correctly when inspected" do

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