title: mongoose update not working
body: <p>I checked many questions on stackoverflow and modified this  simple query thats not working I don't know why...</p>
  
  <pre><code> router.get('/users/:username/suspend', function(req, res){
          var username = req.params.username;
          User.findByUsername(username, function(err, user){
              console.log(user);
              user.suspended = true;
              user.save(function(err, u){
                  res.redirect('ok');
              });
  
          });
  
  });
  </code></pre>
  
  <p>I tried many ways like using model.update with upsert true and false....
  Also its console.log is giving right username in callback.... but there is no change in database...</p>