How to send hidden field values with angularjs using ng-value

Here is my form:

<form ng-submit = "submit()">
                    <input ng-model="formData.data" type="text" name="sticky_content" placeholder="protein" required="true"/>
                    <input type="hidden" name="time_start" ng-value="{{getStuff.e_time}}" required="true"/>
                    <input ng-model="formData.end" type="text" name="time_end" placeholder="{{getStuff.e_time+100}}" required="true"/>
                    <input type="hidden" name="zoom_level" ng-value="{{getStuff.zoom}}" required="true"/>
                    <input type="hidden" name="latitude" ng-value="{{getStuff.lat}}" required="true"/>
                    <input  type="hidden" name="longitude" ng-value="{{getStuff.lon}}" required="true"/>
                    <button type="submit" name="add_sticky" value="add a new stickie!">new sticky</button>   
            </form>

And this is in my controller:

app.controller('mainCtrl',function($scope,$http,sluiceStuff){

    $scope.formData={};

    $scope.formData.e_time = sluiceStuff.e_time;  //again, these are all filling correctly in the "inspect element tab. They just aren't submitting in the POST"
    $scope.formData.zoom = sluiceStuff.zoom;
    $scope.formData.lat = sluiceStuff.lat;
    $scope.formData.lon = sluiceStuff.lon;

Right now only the 1rst and 3rd inputs work - the ng-model ones. By work I mean get sent with the POST request. I know that for the other ones, the "{{getStuff.e_time}}" is filling correctly because i can see the number itself when I do inspect element. However, these other 4 inputs don't even submit, let alone submit correctly. Is this the correct format for my form and am I using ng-value correctly? I am running a node.js server, but since the request isn't even being sent with all of the data, I don't believe that there can be an issue on the server.

Edit: upon request, here is the server side code:

app.post('/api/stickies',function(req,res){
        db.run("INSERT INTO stickies (data, start, end, zoom_level, latitude, longitude) VALUES (?,?,?,?,?,?)", [ req.body.data,req.body.time_start, req.body.end, req.body.zoom_level, req.body.latitude, req.body.longitude ]);
        res.send(200);
});

and also here is the submit function:

$scope.submit = function() {

            $scope.formData.e_time = sluiceStuff.e_time;    //these 4 lines I added
            $scope.formData.zoom = sluiceStuff.zoom;        //to make it work. But I am 
            $scope.formData.lat = sluiceStuff.lat;          //not sure that they are necessary
            $scope.formData.lon = sluiceStuff.lon;           // or that this is the best way to do it
            $http.post('/node/api/stickies', $scope.formData)
                    .then(function(data){
                            $scope.stickies.push(data.config.data);
                            //console.log(data.data);

                    },function(err){console.log(err)});
    };