korauter_issue_2-1.js

 posts.scope('Post', '/:postId', compose([postMiddleware1, postMiddleware2, (post) => {
  // get the 'postId' via `ctx.params`
  post.get('ViewPost', '/', PostsController.view);

  post.scope('Comments', '/comments', compose([postCommentMiddleware1, postCommentMiddleware2, (comments) => {
    comments.get('Index', '/', compose([postCommentIndexMW, CommentsController.index]));
    // also get the 'commentId' via `ctx.params`
    comments.get('View', '/:commentId', CommentsController.view);
  }]));
}]));