Mean stack client side update

I'm having trouble implementing the client side update CRUD logic. The fields are currently being deleted with the set up as it is. What am I missing?

My angular:

$scope.editService = function(id) {
        $http.put('/api/hc/' + id, 
                  {title: 'new',
                   shortname: 'new',
                  summary: 'new',
                  description: 'new'}
                  )
           .success(function(data) {

        })
        .error(function(data) {
            console.log('Error: ' + data);
        });
}; 

My express: Nothing seems to be getting passed the the JSON values, for some reason all of the fields and keys are wiped clean, leaving only the _id and _v keys and values.

.put(function(req, res) {
    Service.findById(req.params._id, function(err, service) {
        if (err)
            res.send(err);
        service.title = req.body.title;     // update the items info
        service.summary = req.body.summary;
        service.shortname = req.body.shortname;
        service.description = req.body.description;
        // save the items
        service.save(function(err) {
            if (err)
                res.send(err);
            res.json({ message: 'Service updated!' });
        });
    });
})

My view

 <form name="editForm" ng-submit="editService(service._id)" ng-repeat="service in services 
 filter:json">
  <input type="text" placeholder="{{ service.title}}" ng-model="serviceTitle" required>
  <input type="text" placeholder="{{ service.shortname}}" ng-model="serviceShortname" required>
  <input type="text" placeholder="{{ service.description}}" ng-model="serviceSummary" required>
  <textarea type="text" placeholder="{{ service.summary}}" ng-model="serviceDescription" required></textarea>
  <button type="submit">Edit</button>
  </form>