CODEWITHSUNDEEP
angularjs
Tony Laidig
Tony Laidig

Reputation: 1078

Why does Angular append 'Provider' to my service name?

I'm trying to figure out why Angular is giving me the following error on a provider I have not declared anywhere.

Error: $injector:unpr
Unknown provider: dblServiceProvider <-

Here's the skeleton of my factory:

angular.module('fv.services', [])
.factory('dblService', function($q, $http) {
    this.getAll = function() {
        var deferred = $q.defer();

        var responsePromise = $http.post(URL, POSTPARAMS)
        .success( function(data, status, header, config) {
            // do something
        })

        return deferred.promise;
    };

    return {
        getAll: getAll()
    };
});

I try to instantiate that service in a controller, and this is where the error above is triggered.

.controller('searchCtrl', ['lotsOfInjections', 'dblService', function(lotsOfInjections, dblService) {
    // do something
}]);

Why does Angular append "Provider" and look for a provider I haven't declared?

Upvotes: 2

Views: 500

Answers (1)

JB Nizet
JB Nizet

Reputation: 691865

Because all services are created by a provider, and the provider of a service is always the service name followed by "Provider".

When you define a service foo using a factory, Angular in fact creates a provider fooProvider, that delegates to the factory to create the service instance. This provider is stored in the registry of service providers. When another component needs the service foo, angular looks for fooProvider in its registry.

Upvotes: 4

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