更新Node.js Passport用户

Question

A Node.js / Express app with MongoDB, and using Passport, Passport Local and Passport Local Mongoose.

I'm trying allow registered users of my site to update their profiles. My idea was to rehash the signup form and logic, and send the updated data via a PUT request to the server.

The signup uses Ajax to submit the form, and whilst that works OK, when I send a PUT request to update the user, req.body comes back empty and the server throws out an error 500.

The update-form markup and javascript are nearly identical to the signup, so is it because I'm using a PUT request? I'm not even sure if I'm going about this in the right way...

Any pointers would be very happily received!

Edit user form submit logic:

    $form.on('submit', function(e) {
      if ($form.hasClass('is-uploading')) return false;

      $form.addClass('is-uploading').removeClass('is-error');

      if (isAdvancedUpload) {
        e.preventDefault();

        var ajaxData = new FormData($form.get(0));

        if (droppedFiles) {
          $.each(droppedFiles, function(i, file) {
            ajaxData.append($input.attr('name'), file);
          });
        }

        $.ajax({
          url: $form.attr('action'),
          type: $form.attr('method'),
          // data: ajaxData,
          dataType: 'json',
          cache: false,
          contentType: false,
          processData: false,
          complete: function() {
            $form.removeClass('is-uploading');
          },
          success: function(data) {
            // $form.addClass(data.success == true ? 'is-success' : 'is-error');
            // if (!data.success) console.log(data);
            window.location.replace('/matches');
          },
          error: function(xhr, textStatus, errorThrown) {
            console.log(xhr)
            console.log(xhr.statusText);
            console.log(textStatus);
            console.log(errorThrown);          }
        });

      } else {
        var iframeName = 'uploadiframe' + new Date().getTime();
        $iframe = $('<iframe name="' + iframeName + '" style="display: none;"></iframe>');

        $('body').append($iframe);
        $form.attr('target', iframeName);

        $iframe.one('load', function() {
          var data = JSON.parse($iframe.contents().find('body').text());
          $form
            .removeClass('is-uploading')
            .addClass(data.success == true ? 'is-success' : 'is-error')
            .removeAttr('target');
          if (!data.success) $errorMsg.text(data.error);
          $form.removeAttr('target');
          $iframe.remove();
        });
      };
    });

Server Side Edit Route:

// PUT edits
app.put('/users/:_id', function(req, res){
  var spokenLangs = req.body.spokenlanguages.split(',');
  var learnLangs = req.body.learninglanguages.split(',');
  var comms = req.body.commethod.split(',');
  var photos = []
  req.files.forEach(function(file, i){
    photos.push(req.files[i].path.replace('public/', '../'));
  });
  var updatedUser = new User(
    {
      username: req.body.username,
      firstName: req.body.fname,
      lastName: req.body.lname,
      age: req.body.age,
      gender: req.body.gender,
      spokenLanguages: spokenLangs,
      learningLanguages: learnLangs,
      info: req.body.info,
      country: req.body.country,
      city: req.body.city,
      comMethod: comms,
      photos: photos,
      lastLogin: Date.now()
    }
  );
  User.findByIdAndUpdate(req.params._id, updatedUser, function(err, user){
    if(err){
      console.log('error updating user');
      console.log(err);
    } else {
      res.redirect('/matches');
    }
  });
});

Thank you good people!