What could be causing the undefined value of $routeParams?

I've encountered an issue while attempting to utilize a service for managing an http request:

angular
    .module('app')
    .factory('stats', function($http){
            return {
                getStats: function(path) {
                    return $http
                       .get(path)
                       .then(function(result) {
                            //resolving the promise with data
                            return result.data;
                        });
                }
            };
    });

However, when I invoke the getStats method in the controller, the $routeParams property turns out to be undefined, leading to the request not executing as expected:

app.controller('ChartController', ['$route', 'stats', '$scope', '$rootScope', '$routeParams', function($route, stats, $scope, $rootScope, $routeParams) {

  console.log($routeParams);

  var path = "/players/players/" + $routeParams.playerId;

  var players = stats.getStats(path);

This error doesn't occur when I directly make the http request within the controller instead of utilizing a service.

Answer №1

It seems that the issue lies in how you are handling your service rather than with the routeParams. The problem arises from the asynchronous nature of AJAX calls, where the response is received before it is returned. There are several approaches to resolving this issue, and I will outline one potential solution for you.

Firstly, update your factory as follows:

angular.module('app')
        .factory('stats', function($http){
            return{
                getStats: function(path) {
          return $http.get(path);
        }
            };
        });

Next, make adjustments to your controller like so:

var players;
stats.getStats(path).then(function(response){
      players = response.data;
});

In addition to these changes, you may consider utilizing the $q service or incorporating callback functions as alternative solutions.

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