Angular.js-providerInjector错误

Question

I have a problem with providers in angular, I get this error:

Row 2696: Error: Unknown provider: a

Using unminified angular v 1.06, Row 2696:

providerInjector = createInternalInjector(providerCache, function() {
    throw Error("Unknown provider: " + path.join(' <- '));
}),

This is the code:

var myApp = angular.module('myApp', [], function ($interpolateProvider) {
    $interpolateProvider.startSymbol('{[{');
    $interpolateProvider.endSymbol('}]}');
});

myApp.directive('buttonsRadio', function() {      
[...]
});


myApp.controller('MainController', function MainController ($scope) {
[...]
})

Any ideas?

Edit: Added error message:

Error: Unknown provider: aProvider <- a
createInjector/providerInjector<@/libs/angular.js:2696
getService@/libs/angular.js:2824
createInjector/instanceCache.$injector<@/libs/angular.js:2701
getService@/libs/angular.js:2824
invoke@/libs/angular.js:2842
instantiate@/libs/angular.js:2874
@/libs/angular.js:4759
applyDirectivesToNode/nodeLinkFn/<@/libs/angular.js:4338
forEach@/libs/angular.js:138
nodeLinkFn@/libs/angular.js:4323
compositeLinkFn@/libs/angular.js:3969
compositeLinkFn@/libs/angular.js:3972
nodeLinkFn@/libs/angular.js:4354
compositeLinkFn@/libs/angular.js:3969
publicLinkFn@/libs/angular.js:3874
bootstrap/resumeBootstrapInternal/</<@/libs/angular.js:963
Scope.prototype.$eval@/libs/angular.js:8011
Scope.prototype.$apply@/libs/angular.js:8091
bootstrap/resumeBootstrapInternal/<@/libs/angular.js:961
invoke@/libs/angular.js:2857
bootstrap/resumeBootstrapInternal@/libs/angular.js:960
bootstrap@/libs/angular.js:973
angularInit@/libs/angular.js:934
@/libs/angular.js:14756
f.Callbacks/n@http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js:2
f.Callbacks/o.fireWith@http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js:2
.ready@http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js:2
B@http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js:2

/libs/angular.js
Line 5704

Answer 1

Before running uglify or any other ofuscator/compression algorithm, you should run the grunt task ng-annotate which adds the dependencies as strings for you as an injectable array, this makes your code a lot cleaner as the injectable annotaion can be added automatically as a build step rather than having to manually code it.

myApp.controller('MainController', function MainController ($scope) {
[...]
})

Becomes:

myApp.controller('MainController', ['$scope', function MainController ($scope) {
[...]
}])

Take a look at: https://github.com/olov/ng-annotate

Update: ng-min AngularJS Pre-minifier deprecated –> use ng-annotate

Answer 2

I assume you're using some kind of javascript obufuscator (Clousure, SquishIt, UglifyJS etc).

In this case you need to specify dependencies in such way:

var myApp = angular.module('myApp', [], ['$interpolateProvider',function ($interpolateProvider) {
    $interpolateProvider.startSymbol('{[{');
    $interpolateProvider.endSymbol('}]}');
}]);

myApp.directive('buttonsRadio', function() {      
[...]
});


myApp.controller('MainController',['$scope', function MainController ($scope) {
[...]
}])

Note to specify dependenices for dependency injection - instead of passing function, you need to specify array with list of strings with names of objects to inject into parameters and the function itself.