Question

Let’s say we have the following service:

myApp.factory('FooService', function () { ...

Then, from a controller, I would say:

myApp.controller('FooCtrl', ['$scope', 'FooService', function ($scope, FooService) { ...

The two-part question is:

1. Global Accessibility: If I have 100 controllers and all need access to the service, I don’t want to explicitly inject it 100 times. How can I make the service globally available? Only thing I can think of at the moment is wrapping it from within the root scope, which defeats the purpose.
2. Accessibility from view: How can I access the service from within the view? This post suggests wrapping the service from within the controller. If I am going to that length, seems I ought to just implement the functionality right on the root scope?

Answer 1

Found a reasonable solution. Inject it into the bootstrap method (run), and add it to the root scope. From there it will be available to all controllers and views.

myApp.run(function ($rootScope, $location, $http, $timeout, FooService) {
    $rootScope.foo = FooService;
    ....

Re-reading the post I mentioned above, it didn’t say “wrap” exactly… just “abstract”, so I presume the poster was referring to this same solution.

For thoroughness, the answer to (1) is then:

myApp.controller('FooCtrl', ['$scope', function ($scope) { 
    // scope inherits from root scope
    $scope.foo.doSomething();
    ...

and the answer to (2) is simply:

{{doSomething()}}

Adding Christopher’s comment to make sure it’s seen:

@rob – According to best practices, the factory should be injected in
to the controllers that need to use it, rather than on the root scope.
As asked, question number one actually is the antipattern. If you need
the factory 100 times, you inject it 100 times. It’s barely any extra
code when minified, and makes it very clear where the factory is used,
and it makes it easier (and more obvious) to test those controllers
with mocks, by having the required factories all listed in the
function signature. – Christopher WJ Rueber Nov 25 ’13 at 20:06