Christine268 Christine268 - 1 month ago 7
AngularJS Question

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
$scope.tasks
.

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
$scope.tasks
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
$scope.tasks
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
file_get_contents
bit.

Answer

You have to "tackle" some points to get the submitTask function into an angular way of thinking.

  • Use ng-model data binding from the input elements to the $scope. There are several tutorials out there. By using this you can get rid of the whole getElementById stuff.

  • Use $http.post to send the data over the wire.

  • Update the $scope.tasks array by simply adding/removing elements. The two way data bindung of angular will do the update for you in e.g. via ng-repeat

For the last to points I sketched the JavaScript code for you.

    $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);
         }
      );
}