AngularJS - 将工厂从另一个模块注入供应商 [英] AngularJS - Injecting factory from another module into a provider

问题描述

我有一个单独的模块的工厂，我想注入到我的模块的提供者，但我不断提供未知的提供者错误。我做错了什么？

我想注入什么：

  var angularSocketIO = angular.module（'socketioModule'，[]）; 
 angularSocketIO.factory（'socketio'，[
'$ rootScope'，
'addr'，
函数（$ rootScope，addr）{
 var socket = io .connect（addr，{
'sync disconnect on unload'：true 
}）; 
 ... 
 return socket; 
} 
]） ; 
  

我正在尝试注入它：

  angular.module（'myApp.services'，['socketioModule']）
 .provider（'greeter'，['socketio'，function（socket）{
 var salutation ='Hello'; 
 this.setSalutation = function（s）{
 salutation = s; 
} 
 
 function Greeter（a）{
 this.salutation = salutation; 
 socket._emit（'hello'）
 
 this.greet = function（）{
 return salutation +''+ a; 
} 
} 
 
这个$ get = function（version）{
 return new Greeter（version）; 
}; 
}] ）; 
  

这导致

 错误：[$ inject：modulerr]由于：
 [$ inject：modulerr]无法实例化模块myApp由于以下原因，未能实例化模块myApp.services：
 [$ inject： unr]未知提供者：socketio 
  

解决方案

我认为是因为全部提供商在工厂之前实例化，因此提供商只能依赖于其他提供商。

作为一种方式，我使用注入方法 angular.module 来创建模块。
应该做你想要完成的一个洞穴： http://plnkr.co/edit/g1M7BIKJkjSx55gAnuD2

请注意，我更改了工厂方法。工厂方法现在使用连接方法返回一个对象
。

  var angularSocketIO = angular.module（'socketioModule '，['ng']）; 
 angularSocketIO.factory（'socketio'，[
'$ rootScope'，
函数（$ rootScope）{
 return {
 connect：function（addr）{
 var socket = io.connect（addr，{
'sync disconnect on unload'：true 
}）; 
 
 return socket; 
} 
}; 
}]）; 
 
 
 angular.module（'myApp.services'，['socketioModule']）
 .provider（'greeter'，[
 function（）{
 var injector = angular.injector（['socketioModule']）; 
 var socketio = injector.get（'socketio'）; 
 
 var salutation ='Hello'; 
 this.setSalutation = function（s）{
 salutation = s; 
} 
 
 function Greeter（a）{
 this.salutation = salutation; 
 socket._emit（'hello'）; 
 
 this.greet = function（）{
 return salutation +''+ a; 
}; 
} 
 
这个$ get = function（version）{
 return new Greeter（version）; 
}; 
} 
]）; 
 
 
 var myApp = angular.module（'myApp'，[myApp.services]）; 
  

I have a factory from a separate module that I would like to inject into a provider for my module, but I keep getting unknown provider errors. What am I doing wrong?

What I would like to inject:

var angularSocketIO = angular.module('socketioModule', []);
angularSocketIO.factory('socketio', [
    '$rootScope', 
    'addr', 
    function($rootScope, addr) {
        var socket = io.connect(addr,{
            'sync disconnect on unload': true
        });
                ...
        return socket;
    }
]);

Where I am trying to inject it:

angular.module('myApp.services', ['socketioModule'])
    .provider('greeter', ['socketio', function(socket) {
        var salutation = 'Hello';
        this.setSalutation = function(s) {
            salutation = s;
        }

        function Greeter(a) {
            this.salutation = salutation;
            socket._emit('hello')

            this.greet = function() {
                return salutation + ' ' + a;
            }
        }

        this.$get = function(version) {
            return new Greeter(version);
        };
    }]);

That results in

Error: [$injector:modulerr] Failed to instantiate module myApp due to:
[$injector:modulerr] Failed to instantiate module myApp.services due to: 
[$injector:unpr] Unknown provider: socketio

解决方案

I think is because all the providers are instantiated before the factories and so a provider has to depend only on other providers.

As a way around that, I am using the injector method of angular.module to create the module. A plunker that should do what you were trying to accomplish: http://plnkr.co/edit/g1M7BIKJkjSx55gAnuD2

Notice that I changed also the factory method. The factory method is now returning an object with a connect method.

var angularSocketIO = angular.module('socketioModule', ['ng']);
angularSocketIO.factory('socketio', [
    '$rootScope',
    function($rootScope) {
      return {
        connect: function(addr) {
          var socket = io.connect(addr, {
            'sync disconnect on unload': true
          });

          return socket;
        }
      };
    }]);


  angular.module('myApp.services', ['socketioModule'])
  .provider('greeter', [
    function() {
      var injector = angular.injector(['socketioModule']);
      var socketio = injector.get('socketio');

      var salutation = 'Hello';
      this.setSalutation = function(s) {
        salutation = s;
      }

      function Greeter(a) {
        this.salutation = salutation;
        socket._emit('hello');

        this.greet = function() {
          return salutation + ' ' + a;
        };
      }

      this.$get = function(version) {
        return new Greeter(version);
      };
    }
  ]);


  var myApp = angular.module('myApp', ["myApp.services"]);

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