association_accessor_methods

# File activerecord/lib/active_record/associations.rb, line 830
        def association_accessor_methods(reflection, association_proxy_class)
          define_method(reflection.name) do |*params|
            force_reload = params.first unless params.empty?
            association = instance_variable_get("@#{reflection.name}")

            if association.nil? || force_reload
              association = association_proxy_class.new(self, reflection)
              retval = association.reload
              unless retval.nil?
                instance_variable_set("@#{reflection.name}", association)
              else
                instance_variable_set("@#{reflection.name}", nil)
                return nil
              end
            end
            association
          end

          define_method("#{reflection.name}=") do |new_value|
            association = instance_variable_get("@#{reflection.name}")
            if association.nil?
              association = association_proxy_class.new(self, reflection)
            end

            association.replace(new_value)

            unless new_value.nil?
              instance_variable_set("@#{reflection.name}", association)
            else
              instance_variable_set("@#{reflection.name}", nil)
              return nil
            end

            association
          end

          define_method("set_#{reflection.name}_target") do |target|
            return if target.nil?
            association = association_proxy_class.new(self, reflection)
            association.target = target
            instance_variable_set("@#{reflection.name}", association)
          end
        end