Fixed overriding initialize and setting an attribute. Fixes #13.

lib/toy/attributes.rb

@@ -99,6 +99,7 @@ def []=(key, value)
 
       private
         def read_attribute(key)
+          @attributes ||= {}
           @attributes[key.to_s]
         end
 
@@ -127,7 +128,7 @@ def attribute?(key)
         end
 
         def initialize_attributes_with_defaults
-          @attributes = {}
+          @attributes ||= {}
           self.class.defaulted_attributes.each do |attribute|
             @attributes[attribute.name.to_s] = attribute.default
           end

spec/toy/attributes_spec.rb

@@ -423,4 +423,25 @@
       User.new.skills.should == []
     end
   end
+
+  # https://github.com/newtoy/toystore/issues/13
+  describe "Overriding initialize and setting an attribute before calling super" do
+    before do
+      User.attribute(:name, String)
+      User.class_eval do
+        def initialize(*)
+          self.name = 'John'
+          super
+        end
+      end
+    end
+
+    it "does not throw error" do
+      lambda { User.new }.should_not raise_error
+    end
+
+    it "sets value" do
+      User.new.name.should == 'John'
+    end
+  end
 end