javascript - Angular 依赖项和提供程序不可用错误

Question

我正在加载在 Github 上找到的文件上传脚本

<script type="text/javascript" src="{% static 'bower_components/angular-file-upload/angular-file-upload.min.js' %}"></script>

并且有一个数据导入模块:

(function () {
 'use strict';

  angular
    .module('TestSite.import', [
      'TestSite.import.controllers'
    ]);

  angular
    .module('TestSite.import.controllers', ['angularFileUpload']);
})();

以及 Controller

(function () {
  'use strict';

  angular
    .module('TestSite.import.controllers' , ['angularFileUpload'])
    .controller('UploadController', UploadController);

  UploadController.$inject = ['$scope','angularFileUpload'];

  /**
  * @namespace UploadController
  */
  function UploadController($scope, FileUploader) {
    $scope.uploader = new FileUploader();

  };

})();

我收到一个错误

 Error: [$injector:unpr] Unknown provider: angularFileUploadProvider <- angularFileUpload

我对模块声明和 DI 感到困惑。为什么我需要声明模块 TestSite.import.controllers 两次？我正在注入(inject)正确的依赖项(angularFileUpload)，但仍然收到该错误，还有什么是提供程序以及为什么 Angular 无法找到它？

Answer 1

看起来您混淆了文件上传服务的名称。正确的依赖注入(inject)如下所示:

angular
    .module('TestSite.import.controllers')
    .controller('UploadController', UploadController);

UploadController.$inject = ['$scope', 'FileUploader'];

/**
 * @namespace UploadController
 */
function UploadController($scope, FileUploader) {
    $scope.uploader = new FileUploader();
};

另请注意，您不必重新定义模块TestSite.import.controllers。要访问已经注册的模块，您需要使用 getter 表示法，这意味着没有依赖项数组作为第二个参数:

.module('TestSite.import.controllers').controller(...);