AngularJS directive doesn't refresh template when scope values are fetched dynamically through ajax requests

Attempting to give this question a precise title as possible, I find myself struggling with an issue in AngularJS. While trying to showcase my problem through a jsfiddle, it turned out to be too reliant on multiple files and not yet accessible online. So please bear with the lengthiness of my explanation.

The situation is that I have developed an application using yeoman init angular, and within my app.js, the structure appears as below:

"use strict"

var myApp = angular.module("myApp", [])
.config(function($routeProvider) {
    $routeProvider
    .when("/lineup", {
        templateUrl: "views/lineup.html",
        controller: "LineupCtrl"
    })
    //other routes
    .otherwise({
        redirectTo: "/"
    });
})
.directive("playerlist", function() {
    return {
        restrict: "E",
        transclude: false,
        scope : {},
        templateUrl : "views/directives/playerlist.html",
        controller : function($scope) {
            $.get("/players")
            .success(function(players) {
                $scope.players = players;
            });
        },
        replace : true
    }
});

In my index.html, I reference app.js, and there's an anchor pointing to #/lineup, which triggers the display of views/lineup.html. For simplicity, let's assume that lineup.html only contains the custom tag

<playerlist></playerlist>
.
Within the directive's controller function, I can confirm that $.get("/players") functions correctly by inspecting Chrome's network tab for the expected array of players retrieved from the server.
Additionally, the contents of views/directives/playerlist.html consist of the following code to format and display the player list:

<table class="table table-striped">
    <thead>
        <tr>
            <th>Name</th>
            <th>Age</th>
            <th>Role</th>
            <th>Strength</th>
        </tr>
    </thead>
    <tbody>
        <tr ng-repeat="player in players">
            <td>{{player.first_name}} {{player.last_name}}</td>
            <td>{{player.age}}</td>
            <td>{{player.role}}</td>
            <td>{{player.strength}}</td>
        </tr>
    </tbody>
</table>

The intention behind creating the "playerlist" directive was to keep it independent from LineupCtrl for potential reuse elsewhere in the project.
When clicking on the anchor to load #/lineup for the first time, the tbody element remains empty initially. Interestingly, upon clicking again, the table populates correctly with the player data fetched using $.get("/players"). This delay in rendering could potentially be attributed to the time gap between loading playerlist.html and assigning values to the $scope.players variable. But isn't Angular designed to update views automatically when scope variables change?
Seeking assistance with resolving this issue!
Regards,

Andrea

Answer №1

When modifying scope variables outside of an Angular function, it's important to notify Angular that a change has occurred. Refer to scope.$apply.

$.get("/players")
.success(function(players) {
   $scope.$apply(function () {
     $scope.players = players;
   });
});

Additionally, Angular offers a built-in ajax service, eliminating the need for jQuery. You can find a detailed explanation in the tutorial: 5 - XHRs & Dependency Injection.

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