Injecting a resolved promise into service

Question

I need to get some information (a schema) from the server before I set up a bunch of services that depend on that information.

My server provides a schema that defines v

Answer 1

You get a promise because your service function immediately evaluates its body when you call it (as functions do). Normally, a service should return an object so that the consumer (another service, controller, whatever) may then call the functions on that object when it needs to.

services.factory('schema', function($q, $http) {
return {
  get: function() {
    var deferred = $q.defer();
    $http.get('schema/').then(function(response) {
      schema = // some function of response.data
      deferred.resolve(schema);
    }, function() {
      deferred.reject('There was a problem fetching the schema');
    });
    return deferred.promise;
  }
}

});

Answer 2

What you want is deferred bootstrap. There is already a plugin written for this purpose - https://github.com/philippd/angular-deferred-bootstrap.

I create an example at plunkr - http://plnkr.co/edit/VfISHNULXRLe52NeAsn1?p=preview

*You must replace existing ng-app with deferred bootstrap

Code Snippet -

angular.element(document).ready(function() {
    deferredBootstrapper.bootstrap({
        element: document.body,
        module: 'plunker',
        resolve: {
            schema: ['$http',
                function($http) {
                    return $http.get('schema.json');
                }
            ]
        }
    });
});

Then, you can use schema anyway in controller, services or factory just like route resolve.

Sample Code for Factory

app.factory('SomeService', function(schema){
    return {
        getTitle: function() {
            return schema.title;
        }
    }
});