AngularJS Inject Fallback

Question

I have a situation where sometimes I have locals passed into the controller and sometimes not.

What I'd like to be able to do is if the "locals" are not available, not throw exception and instead just call the Controller and leave locals == null.

.controller('SomeCtrl', ['$scope', 'locals', function ($scope, locals) {
  if (!locals) // do something
  else // do something else
};

In one case controllers are being created using the $controller service. $controller('SomeCtrl', { locals: 'some locals');

But in other cases I have no control over how the controller is instantiated and the locals are not available. I wish Angular would just pass undefined like normal javascript...

THIS ISN'T COOL:

Error: Unknown provider: localsProvider <- locals
    at Error (<anonymous>)
    at http://localhost:1573/Scripts/angular.js:2832:15
    at Object.getService [as get] (http://localhost:1573/Scripts/angular.js:2960:39)
    at http://localhost:1573/Scripts/angular.js:2837:45
    at getService (http://localhost:1573/Scripts/angular.js:2960:39)
    at invoke (http://localhost:1573/Scripts/angular.js:2978:13)
    at Object.instantiate (http://localhost:1573/Scripts/angular.js:3012:23)
    at $get (http://localhost:1573/Scripts/angular.js:4981:24)
    at http://localhost:1573/Scripts/angular.js:4560:17
    at forEach (http://localhost:1573/Scripts/angular.js:137:20)

JayPrime2012 · Accepted Answer · 2013-10-26 00:29:12Z

9

It turns out you can just set 'locals' to undefined and it will use the correct locals if they are available.

angular.module('module').value('locals', undefined)

answered Oct 26, 2013 at 0:29

JayPrime2012

2,6924 gold badges31 silver badges46 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

bekite · Accepted Answer · 2013-10-26 00:42:07Z

-1

you can use the $injector service to inject dependencies.

.controller('SomeCtrl', ['$scope', '$injector', function ($scope, $injector) {
  try {
    service = $injector.get('locals');
  } catch {}
  if (!service) // do something
  else // do something else
};

edited Oct 26, 2013 at 0:42

answered Oct 26, 2013 at 0:26

bekite

3,4442 gold badges26 silver badges31 bronze badges

1 Comment

JayPrime2012 Over a year ago

This is service locator anti-pattern.

Collectives™ on Stack Overflow

AngularJS Inject Fallback

2 Answers 2

Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related