lieke==1
app.post("/index/:id", function (req, res) { TestData.findById(req.params.id, function (err, theUser) { if (err) { console.log(err); } else { theUser.likes += 1; theUser.save(); console.log(theUser.likes); res.send({likeCount: theUser.likes}); //something like this... } }); });
Source: stackoverflow.com