set_member_mappings_for_resource

# File actionpack/lib/action_dispatch/routing/mapper.rb, line 1772
          def set_member_mappings_for_resource
            member do
              get :edit if parent_resource.actions.include?(:edit)
              get :show if parent_resource.actions.include?(:show)
              if parent_resource.actions.include?(:update)
                patch :update
                put   :update
              end
              delete :destroy if parent_resource.actions.include?(:destroy)
            end
          end