meteor 铁路由器onBeforeAction this.next undefined

我有以下路由配置:https://gist.github.com/chriswessels/76a64c421170095eb871

尝试加载路线时出现以下错误:

Exception in defer callback: TypeError: undefined is not a function
at manageLoadingIndicator (http://localhost:3000/both/router/routes.js?ef701fada29363a443a214f97988ce96ebaec025:30:10)
at RouteController.runHooks (http://localhost:3000/packages/iron_router.js?da7f2ac81c3fd9daebf49ce9a6980a54caa1dc17:843:16)
at http://localhost:3000/packages/iron_router.js?da7f2ac81c3fd9daebf49ce9a6980a54caa1dc17:2302:14
at Tracker.Computation._compute (http://localhost:3000/packages/tracker.js?192a05cc46b867dadbe8bf90dd961f6f8fd1574f:288:36)
at new Tracker.Computation (http://localhost:3000/packages/tracker.js?192a05cc46b867dadbe8bf90dd961f6f8fd1574f:206:10)
at Object.Tracker.autorun (http://localhost:3000/packages/tracker.js?192a05cc46b867dadbe8bf90dd961f6f8fd1574f:476:11)
at http://localhost:3000/packages/iron_router.js?da7f2ac81c3fd9daebf49ce9a6980a54caa1dc17:2279:12
at Utils.extend._run.withNoStopsAllowed (http://localhost:3000/packages/iron_router.js?da7f2ac81c3fd9daebf49ce9a6980a54caa1dc17:2248:21)
at Tracker.Computation._compute (http://localhost:3000/packages/tracker.js?192a05cc46b867dadbe8bf90dd961f6f8fd1574f:288:36)
at new Tracker.Computation (http://localhost:3000/packages/tracker.js?192a05cc46b867dadbe8bf90dd961f6f8fd1574f:206:10)

谈论的是以下行，该行位于onBeforeAction Hook 中:

function manageLoadingIndicator (pause) {
  if (this.ready()) {
    Session.set('loading', false);
    this.next(); // THIS LINE HERE
  } else {
    Session.set('loading', true);
    pause();
  }
}

为什么this.next未定义？请帮助!

克里斯

最佳答案

您正在混淆Iron路由器的不同版本:

在Iron Router 1.0之前，除非onBeforeAction(调用pause的第一个arg。除非存在onBeforeAction方法，否则.next()将继续起作用。

从1.0开始，此设置已更改。 pause()不再作为参数传递。这是.next()方法替换它的地方。

您显然正在旧版本的Iron Router上运行，因此您的钩子(Hook)应如下所示:

function manageLoadingIndicator (pause) {
  if (this.ready()) {
    Session.set('loading', false);
  } else {
    Session.set('loading', true);
    pause();
  }
}

升级铁路由器后，需要将其更改为此:

function manageLoadingIndicator () {
  if (this.ready()) {
    Session.set('loading', false);
    this.next();
  } else {
    Session.set('loading', true);
  }
}