无法读取未定义的属性。 如何定义？

Question

I am trying to run a custom PUT in Angularjs, however I cannot for the life of me get it to work. I need both UserResource and user to be defined but only the parameter in the first position of the update function gets defined. What can I do to define both user and UserResource?

(function () {

class AdminController {
  constructor(User, Auth) {
    this.users = User.query();
    this.Auth = Auth;
  }

//here user is defined and I can run the delete function
  delete(user) {
    user.$remove();
    this.users.splice(this.users.indexOf(user), 1);
  }

// and if I put user into the first position it is defined but UserResource isn't 
// as written here it isn't defined either. 
  update(UserResource, user) {
    var $id = user._id;
    UserResource.update({ id:$id }, user);
  }
}

angular.module('wcsdesktopApp.admin')
  .controller('AdminController', AdminController);
})();

EDIT to add more information

I call the update function like this:

  <table>
    <tr>
      <a ng-click="admin.update(user)" class="update"><span class="fa fa-refresh fa-2x"></span></a>
    </tr>
    <tr>
      <a ng-click="admin.delete(user)" class="trash"><span class="fa fa-trash fa-2x"></span></a>
    </tr>
  </table>

I included the delete function for reference since that is working.

UserResource is an AngularJS $resource custom put request.

(function() {

function UserResource($resource) {
  return $resource('/api/users/:id/:controller', {
    id: '@_id'
  }, {
    changePassword: {
      method: 'PUT',
      params: {
        controller: 'password'
      }
    },
    update: {
      method: 'PUT'
    },
    get: {
      method: 'GET',
      params: {
        id: 'me'
      }
    }
  });
}

angular.module('wcsdesktopApp.auth')
  .factory('User', UserResource);

})();

Answer 1

You need to make sure that you are injecting your UserResource service into your controller. One of the many ways would be like the below:

angular.module('wcsdesktopApp.admin').controller('AdminController', AdminController);
AdminController.$inject = [ 'User'];
function AdminController(User) {}

Doing that would then change your update signature in your controller to the following:

update(user) {
    User.update(); // Do whatever update.
}