require 'active_record/attribute_methods'

module ActiveRecord
  module ConnectionAdapters
    module SQLServer
      module CoreExt
        module AttributeMethods


          private

          def attributes_for_update(attribute_names)
            super.reject do |name|
              column = self.class.columns_hash[name]
              column && column.respond_to?(:is_identity?) && column.is_identity?
            end
          end

        end
      end
    end
  end
end

ActiveSupport.on_load(:active_record) do
  include ActiveRecord::ConnectionAdapters::SQLServer::CoreExt::AttributeMethods
end