Fix printing abstract classes in ActiveRecord 3

lib/awesome_print/ext/active_record.rb

@@ -56,6 +56,7 @@ module AwesomePrint
     #------------------------------------------------------------------------------
     def awesome_active_record_class(object)
       return object.inspect if !defined?(::ActiveSupport::OrderedHash) || !object.respond_to?(:columns) || object.to_s == "ActiveRecord::Base"
+      return awesome_class(object) if object.respond_to?(:abstract_class?) && object.abstract_class?
 
       data = object.columns.inject(::ActiveSupport::OrderedHash.new) do |hash, c|
         hash[c.name.to_sym] = c.type

spec/ext/active_record_spec.rb

@@ -56,6 +56,10 @@ begin
       end
     end
 
+    class AbstractClass < ActiveRecord::Base
+      self.abstract_class = true
+    end
+
     describe "AwesomePrint/ActiveRecord" do
       before do
         stub_dotfile!
@@ -399,6 +403,10 @@ EOS
         it "should print ActiveRecord::Base objects (ex. ancestors)" do
           expect { @ap.send(:awesome, User.ancestors) }.not_to raise_error
         end
+
+        it "should print an abstract class" do
+          @ap.send(:awesome, AbstractClass).should == "AbstractClass(abstract) < ActiveRecord::Base"
+        end
       end
 
       #------------------------------------------------------------------------------