Working with routing for Express and Pug (formally jade)

I am having trouble linking to a url for an individual post. Unsure if the problem is with jade or my express middleware.

pug - The a tag is the main focus here. The href should link to an individual post using the item.id as an identifier.

...
  ul
    each post in posts
      li
        a(href='/users/feed/#{post.id}') #{post.title}

express - getting a singular post works fine when the id of a post is put directly into a url bar (e.g copy and paste the id - localhost:5000/users/feed/ididididididididid) but does not work when clicking the pug href (instead the url bar show localhost:5000/users/feed/#{post.id})

The pug href does not even register the GET to /users/feed/:id, in the log is shows the GET as /users/feed/

//singular post routes
router.get('/feed/:id', function (req, res, next) {
  var id = req.params.id;
  Post.findById(id, function (err, post) {
    if (err) {
      next(err);
    }
    console.log(post);
    return res.render("post", { post:post })
  })
})

Can post the rest of the code if need be.

Any help greatly appreciated :)