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@@ -109,7 +109,7 @@ module ActiveRecord
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       # Returns +true+ if +self+ and +other_aggregation+ have the same +name+ attribute, +active_record+ attribute,
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       # and +other_aggregation+ has an options hash assigned to it.
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       def ==(other_aggregation)
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-        name == other_aggregation.name && other_aggregation.options && active_record == other_aggregation.active_record
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+        other_aggregation.kind_of?(self.class) && name == other_aggregation.name && other_aggregation.options && active_record == other_aggregation.active_record
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       end
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       def sanitized_conditions #:nodoc:

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@@ -166,6 +166,10 @@ class ReflectionTest < ActiveRecord::TestCase
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     assert_equal 0, Firm.reflect_on_all_associations(:belongs_to).size
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   end
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+  def test_reflection_should_not_raise_error_when_compared_to_other_object
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+    assert_nothing_raised { Firm.reflections[:clients] == Object.new }
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+  end
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+
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   private
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     def assert_reflection(klass, association, options)
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       assert reflection = klass.reflect_on_association(association)