CODEWITHSUNDEEP
angularjsservicedependency-injection
Rahul
Rahul

Reputation: 211

How to call a service by his name at controller runtime in angularJs?

I am passing the service name from one controller to another controller as argument in angularjs. When I receive that variable in the second controller and use it as service name then I get an error i.e. serviceNameVariable.get is not a function. So my question is that, How can I use a variable as service name in a controller ?

Upvotes: 1

Views: 412

Answers (2)

sdgluck
sdgluck

Reputation: 27327

Look at Angular's $injector service which allows you to dynamically retrieve your own or native angular modules anywhere:

$injector is used to retrieve object instances as defined by provider, instantiate types, invoke methods, and load modules.

We inject the $injector service like any other:

app.controller('ctrl', function ($injector) {
    var serviceNameVariable = '$http'; // or some input
    var service = $injector.get(serviceNameVariable);

    // Use the 'injected' service, in this case the $http#get method:
    service.get('http://endpoint');
});

Upvotes: 0

Deblaton Jean-Philippe
Deblaton Jean-Philippe

Reputation: 11398

It's not that difficult to get a service by his name.

Dependency injection can also be done at runtime in angular :

angular.module("someApp").controller("childController", [
    "$injector",
    function($injector){
        var serviceName = "someServiceName";

        var service = $injector.get(serviceName);

        service.executeAction(someParams);
    }
]);

Upvotes: 3

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