title: How do I increment a Number value in Mongoose?
body: <p>People of StackOverflow, I am burning with the question, how do I increment a<br>
  Number value in Mongoose? I have tried the code below, though it is not working. I am trying to increment a value by one on the submission of a form. Below is my code:</p>
  
  <pre><code>app.post('/like', function (req, res) {
      var id = req.body.id;
      var query = {_id: id};
      var post = Meme.findOne(query);
      Meme.findOneAndUpdate(post, post.likes: post.likes+1)
  });
  </code></pre>
  
  <p>Thanks so much for your valuable help!</p>