Initializing a resource in AngularJS by populating it with a string retrieved from an $http request

One issue I encountered with my angular app is the need to initialise some resources with a string value. For example:

angular.module('client.core.resources')
   .factory('AuthenticationResource', ['$resource','ConstantValueService', function ($resource,ConstantValueService) {
  var authUrl = ConstantValueService.get('webApiUri') + '/api/authentication';
  return $resource(authUrl, {},
      {
        login: {
          method: 'POST',
          isArray: false
        },
        logout: {
          method: 'DELETE',
          isArray: false
        }
      });
}]);

I have a json file with data containing values for a webApiUri that I attempted to use in the following way:

 angular.module('myapp').run(['$http',function($http){
      $http.get('client.json').success(function (settings) {
        ConstantValueService.setFields(settings);
    });
  }])

Unfortunately, due to the asynchronous nature of the process, the authUrl in the resource gets initialised before the client.json is loaded, resulting in authUrl being undefined.

I am seeking a solution to delay the initialisation and execution of the angular app until the $http promise is resolved. Any suggestions on accomplishing this in an efficient manner would be greatly appreciated.

Answer №1

If you're looking for a comprehensive overview of this topic, I recommend checking out another post on StackOverflow that delves into this specific issue.

In response to your problem, I created a demo of my own which addresses the same concerns. Feel free to explore the project on GitHub. My approach was inspired by JBCP's suggestion of manual initialization, tailored to suit the unique requirements of your situation.

For further insight, I suggest consulting the official AngularJS documentation on this matter.

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