Ruby 1.9 compat: attribute methods

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@8486 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

1 files changed, 3 insertions, 2 deletions

diff --git a/activerecord/lib/active_record/attribute_methods.rb b/activerecord/lib/active_record/attribute_methods.rb
index 3ae42ddac7..657c575866 100644
--- a/activerecord/lib/active_record/attribute_methods.rb
+++ b/activerecord/lib/active_record/attribute_methods.rb
@@ -82,9 +82,10 @@ module ActiveRecord
       # Check to see if the method is defined in the model or any of its subclasses that also derive from ActiveRecord.
       # Raise DangerousAttributeError if the method is defined by ActiveRecord though.
       def instance_method_already_implemented?(method_name)
+        method_name = method_name.to_s
         return true if method_name =~ /^id(=$|\?$|$)/
-        @_defined_class_methods         ||= Set.new(ancestors.first(ancestors.index(ActiveRecord::Base)).collect! { |m| m.public_instance_methods(false) | m.private_instance_methods(false) | m.protected_instance_methods(false) }.flatten)
-        @@_defined_activerecord_methods ||= Set.new(ActiveRecord::Base.public_instance_methods(false) | ActiveRecord::Base.private_instance_methods(false) | ActiveRecord::Base.protected_instance_methods(false))
+        @_defined_class_methods         ||= ancestors.first(ancestors.index(ActiveRecord::Base)).sum([]) { |m| m.public_instance_methods(false) | m.private_instance_methods(false) | m.protected_instance_methods(false) }.map(&:to_s).to_set
+        @@_defined_activerecord_methods ||= (ActiveRecord::Base.public_instance_methods(false) | ActiveRecord::Base.private_instance_methods(false) | ActiveRecord::Base.protected_instance_methods(false)).map(&:to_s).to_set
         raise DangerousAttributeError, "#{method_name} is defined by ActiveRecord" if @@_defined_activerecord_methods.include?(method_name)
         @_defined_class_methods.include?(method_name)
       end