How to inject dependency into existing controller in AngularJS

Question

I have this controller that is defined on the body element:

app.controller('bodyController', ['$injection1', '$injection2',
    function($injection1, $injection2){
        // doing stuff here
}]);

Now somewhere else, I want to be able to inject another dependency into this controller. Pseudo-code:

app.controller('bodyController').inject(['$injection3', function($injection3){
    // doming more stuff here
});

Is this possible at all?

Pankaj Parkar · Accepted Answer · 2016-05-16 06:33:54Z

3

You could inject $injector dependency inside controller & then inside a controller you can directly ask for other dependency in it.

app.controller('bodyController', ['$injection1', '$injection2', '$injector',
    function($injection1, $injection2, $injector){
      var injectorGet = $injector.get;
      //myService will be singleton instance of myService
      var myService = injectorGet('myService');
      //and injectorGet which you can get other dependency too.
}]);

answered May 16, 2016 at 6:33

Pankaj Parkar

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5 Comments

Saeed Neamati Over a year ago

OP says somewhere else. I think this can't be then answer. Because in this case why not simply injecting myService in the first place?

Pankaj Parkar Over a year ago

@SaeedNeamati what I understood from question is, OP wants to add/access 3rd(other) dependency, which he wanted to add later(this is what I assumed), let see what OP wants.. he will comment on it.. correct me if I'm missing anything. Though thanks for heads up.. :)

Hadi Over a year ago

@PankajParkar, What do I do?I mean injection service elsewhere?

Hadi Over a year ago

I mean injection service elsewhere? Why don't be injected at first?

Pankaj Parkar Over a year ago

@SSH because OP wanted to get dependency object dynamically, there might be a case with OP, where sometimes he might have added service/factory in app module, based on some condition in controller using $injector dependency (The reason I haven't added in DI array is, it will throw an error when dependency isn't there module)

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