include

# File actionpack/lib/action_controller/metal/params_wrapper.rb, line 99
      def include
        return super if @include_set

        m = model
        synchronize do
          return super if @include_set

          @include_set = true

          unless super || exclude
            if m.respond_to?(:attribute_names) && m.attribute_names.any?
              if m.respond_to?(:stored_attributes) && !m.stored_attributes.empty?
                self.include = m.attribute_names + m.stored_attributes.values.flatten.map(&:to_s)
              else
                self.include = m.attribute_names
              end

              if m.respond_to?(:nested_attributes_options) && m.nested_attributes_options.keys.any?
                self.include += m.nested_attributes_options.keys.map do |key|
                  key.to_s.concat("_attributes")
                end
              end

              self.include
            end
          end
        end
      end