How to update my $scope after adding new data to SQL database

So I'm using angularjs/SQL technique to retrieve data from a database like so:

$http.get("retrieveData.php").then(function(response){

    $scope.tasks = response.data.tasks;

})

Then I have a function that allows me to use a form to insert new data into a database:

$scope.submitTask = function(){

    var description = document.getElementById("typeDescription").value;

    var todayDate = document.getElementById("todayDate").value;



    try{

        reminder = document.getElementById("reminder").value;

    }

    catch(err){

        reminder = "NONE";

    }



    var status = document.getElementsByName("selectStatus");

    var statusValue;



    for(i=0;i<status.length;i++){

        if(status[i].checked){

            statusValue = status[i].value;

        }

    }



    var xhttp = new XMLHttpRequest();



      xhttp.onreadystatechange = function() {

           if (this.readyState == 4 && this.status == 200) {

                document.getElementById("msg").innerHTML = this.responseText;

            }

      };

      xhttp.open("POST", "enterTask.php");

      xhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");

        xhttp.send("desc="+description+"&status="+statusValue+"&reminder="+reminder+"&todayDate="+todayDate);

}

I'm sure my first problem is that I'm using JavaScript's AJAX instead of Angular's? But I don't know how to convert it.

Even so, I don't know how to then update the .

I've looked online how to POST using Angular and haven't been able to find much. Just the tutorial on how to get.

Please don't give any JQuery. I am using pure JavaScript, thank you.

---

Thanks to some help I've restructured my code a bit (still mixing JavaScript but I plan to research Angular forms). Here is what I have now.

$http.get("retrieveData.php").then(function(response){

        $scope.tasks = response.data.tasks;

    })



    $scope.submitTask = function(){

        var description = document.getElementById("typeDescription").value;

        var todayDate = document.getElementById("todayDate").value;



        try{

            reminder = document.getElementById("reminder").value;

        }

        catch(err){

            reminder = "NONE";

        }



        var status = document.getElementsByName("selectStatus");

        var statusValue;



        for(i=0;i<status.length;i++){

            if(status[i].checked){

                statusValue = status[i].value;

            }

        }



        var task = {

            desc:description,

            status:statusValue,

            reminder:reminder,

            todayDate: todayDate

        }

        $http.post('enterTask.php', task).then(

            function(response){

                $scope.tasks.push(task);

            }

        );

    }



});

For some reason though, my is still not updating after I add to the element. If I add an element to an empty database I get an angular error in my console.

TypeError: Cannot read property 'push' of undefined

Sooo. Not sure why this is.

When I alert the after the push, it alerts 1 less than it should actually contain after push (once there is 1 or more elements in database to not produce above error).

Here is my HTML, maybe it has something to do with it?

<ul>

    <li ng-repeat="x in tasks" ng-bind="x.Description"></li>

</ul>

<form>

        <input type="text" value="{{today}}" id="todayDate">

        <textarea rows="15" cols="100" name="typeDescription" id="typeDescription"></textarea>

        <input type="checkbox" ng-model="setReminder" name="setReminder">Set Reminder

        <input type="date" name="reminder" id="reminder" ng-if="setReminder"><br>

        <input type="radio" name="selectStatus" value="CR">Client Response

        <input type="radio" name="selectStatus" value="IR">Internal Response

        <input type="radio" name="selectStatus" value="BD">BD Control

        <input type="radio" name="selectStatus" value="OC">On Calendar<br>

        <input type="submit" ng-click="submitTask();">

    </form>

Also my php...

<?php



/*$description = json_decode($_POST['desc']);

$reminder = json_decode($_POST['reminder']);

$todayDate = json_decode($_POST['todayDate']);

$status = json_decode($POST['status']);*/



$data = json_decode(file_get_contents("php://input"));



$description = $data->desc;

$reminder = $data->reminder;

$todayDate = $data->todayDate;

$status = $data->status;



require 'databaseConnect.php';



      $query="INSERT INTO TaskTracker (DATESTAMP,STATUS,DESCRIPTION,REMINDER) VALUES ('$todayDate','$status','$description','$reminder')";



      mysql_query($query) or die(mysql_error());



?>

The commented out part wasn't working so then I used the bit.