# File lib/active_record/base.rb, line 730
      def column_methods_hash
        @dynamic_methods_hash ||= column_names.inject(Hash.new(false)) do |methods, attr|
          methods[attr.to_sym]       = true
          methods["#{attr}=".to_sym] = true
          methods["#{attr}?".to_sym] = true
          methods["#{attr}_before_type_cast".to_sym] = true
          methods
        end
      end