updating model and binding update operations with UI - angularjs

Question

I currently have developed a table of content using AngularJS, the table will populate based on an Angular Service "Model" which invokes a web service and returns list and using ng-repeat and creating a table and all its content.
Everything at the moment works fine, I have a minor problem though. Part of the table, we are outputting an action button which when clicked invokes a web service which update the current record. Am trying to make the record data gets updated automatically, but i must refresh the page in order to see the changes.
Here is my code
My app.js
angular.module('my_vehicles', ['vehicleServices', 'AccountsDirectives']);
service.js
'use strict';
angular.module('vehicleServices', ['ngResource']).
factory('Car', function($resource) {
return $resource('/vehicle/api/car.json/:id', {},
{
query: {method:'GET', isArray:false},
delete: {method:'DELETE', isArray:false},
update: {method:'PUT', isArray:false}
}
);
});
controller.js
'use strict';
function MyVehicleController($scope, Car) {
var init = function() {
$scope.page_has_next = true;
$scope.cars = [];
$scope.page = 1;
};
// initialize values
init();
Car.query({my_vehicle: true},
// success
function(data) {
$scope.page_has_next = data.has_next;
$scope.cars = data.objects;
},
// error
function(data) {
}
);
$scope.mark_sold = function(id, index) {
Car.update({
id : id,
status : 'S'
},
function(data) {
});
}
$scope.delete = function(id, index) {
Car.delete(
{id: id},
// on success
function() {
// remove the element from cars array and it will be
// automatically updated by ng-repeat
$scope.cars.splice(index, 1);
$scope.loadMore(1);
}
);
}
$scope.is_total_zero = function() {
return !!($scope.cars.length)
//return $scope.cars.length > 0 ? true : false
}
$scope.loadMore = function(limit) {
if($scope.page_has_next) {
$scope.$broadcast('loading_started');
console.log(limit);
Car.query({my_vehicle: true, page: $scope.page, limit: limit},
// success
function(data) {
$scope.page_has_next = data.has_next;
$scope.cars = $scope.cars.concat(angular.fromJson(data.objects));
$scope.page++;
$scope.$broadcast('loading_ended');
},
// error
function() {
$scope.page_has_next = false;
$scope.$broadcast('loading_ended');
}
);
}
}
$scope.$on('loading_started', function() {
$scope.state = 'loading';
});
$scope.$on('loading_ended', function() {
$scope.state = 'ready';
});
}
and finally, my html code
<tr ng-repeat="car in cars">
<td>{% ng car._get_model_display.make_display %} {% ng car._get_model_display.model_display %} {% ng car._get_model_display.trim_display %}</td>
<td>{% ng car.created_at_format %}</td>
<td>{% ng car.view_count %}</td>
<td ng-model="car.status_label">{% ng car.status_label %}</td>
<td>
<div class="btn-group">
<button ng-disabled="car.status == 'S' || car.status == 'P'" ng-model="edit" class="btn btn-mini edit-btn">{% trans 'Edit' %}</button>
<button ng-disabled="car.status == 'S'" ng-click="delete(car.id, $index)" class="btn btn-mini delete-btn">{% trans 'Delete' %}</button>
<button ng-disabled="car.status == 'S' || car.status == 'P'" ng-click="mark_sold(car.id, $index)" class="btn btn-mini edit-btn">{% trans 'Mark as sold' %}</button>
</div>
</td>
</tr>
P.S the {% ng XXX %} is outputting {{ XXX }}, am using the above syntax because django templating engine does not allow me to use {{}} so i've developed a templatetag that would output {{}} ..
As mentioned earlier, my problem is that every time I invoke "mark as sold" it would invoke the cars.update() but it will not update the record displayed, must refresh to see changes. Any idea how i can solve this?

Answer 1

As far as I understand your code you only update the db without updating the cars model ($scope.cars) so changes are only reflected in the db but not in the AngularJS application.
Maybe try the following:
$scope.mark_sold = function(id, index) {
Car.update({
id : id,
status : 'S'
},
function(data) {
$scope.cars[id].status = 'S';
});
}

Answer 2

You need to also update your in-memory cars array.
You already have the array index (second parameter of the mark_sold function):
$scope.mark_sold = function(id, index) {
Car.update({
id : id,
status : 'S'
},
function(data) {
// Update in-memory array
$scope.$apply(function(scope) {
scope.cars[index].status = 'S';
});
});
}