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all_attributes_exists?(attribute_names) private

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# File activerecord/lib/active_record/base.rb, line 1712
        def all_attributes_exists?(attribute_names)
          attribute_names = expand_attribute_names_for_aggregates(attribute_names)
          attribute_names.all? { |name| column_methods_hash.include?(name.to_sym) }
        end
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