I'm running a Node.js-server and trying to test this Rest API that I made with Express. It's linked up to MongoDB using Mongoose.

I'm testing the individual routes using Postman and I get an error when trying to send a PUT-request to this route:

// PUT /meetings/:id

// Route for editing a specific meeting

router.put(/:id, function(req, res, next) {

    req.meeting.update(req.date, function(err, result) {

      if(err) return next(err);

      res.json(result);

    });

});

The error retrieved is this:

events.js:141

      throw er; // Unhandled 'error' event

      ^



TypeError: next is not a function

I cannot figure out where exactly this is coming from. I'm using the router.params-method to specify how the :id-parameter should be handled like this:

router.param(id, function(req, res, id, next) {

  Meeting.findById(id, function(err, meeting) {

    if (err) return next(err);

    if (!meeting) {

      err = new Error(Meeting not found);

      err.status = 404;

      return next(err);

    }

    req.meeting = meeting;

    return next();

  });

});