Iron-Router： onBeforeAction() -> .next() 不是一个函数

Question

我的流星应用程序有问题，我不知道为什么。

我的流星版本是1.1.0.3，这里是我的软件包列表:

accounts-password        1.1.1  Password support for accounts
alanning:roles           1.2.13  Role-based authorization
chrismbeckett:toastr     2.1.2_1  Gnome / Growl type non-blocking notifications
coffeescript             1.0.6  Javascript dialect with fewer braces and semi...
email                    1.0.6  Send email messages
fortawesome:fontawesome  4.4.0  Font Awesome (official): 500+ scalable vector...
fourseven:scss           3.2.0  Style with attitude. Sass and SCSS support fo...
insecure                 1.0.3  Allow all database writes by default
iron:router              1.0.9  Routing specifically designed for Meteor
jquery                   1.11.3_2  Manipulate the DOM using CSS selectors
meteor-platform          1.2.2  Include a standard set of Meteor packages in ...

好了……现在我们来谈谈我的问题。我想为那些没有"管理员"角色的用户保护一些路由，这是可行的。系统正确检查我的角色，但是他们不渲染视图。

控制台错误消息

Exception in delivering result of invoking 'accounts/hasAdminRole': TypeError: me.next is not a function
    at http://localhost:3000/lib/controllers/admin_controller.js?843e8c9edbf0891b773aa63a9ad004d1afcbfb19:28:9
    at Meteor.bindEnvironment [as _callback] (http://localhost:3000/packages/meteor.js?43b7958c1598803e94014f27f5f622b0bddc0aaf:983:22)
    at _.extend._maybeInvokeCallback (http://localhost:3000/packages/ddp.js?d1840d3ba04c65ffade261f362e26699b7509706:3860:12)
    at _.extend.receiveResult (http://localhost:3000/packages/ddp.js?d1840d3ba04c65ffade261f362e26699b7509706:3880:10)
    at _.extend._livedata_result (http://localhost:3000/packages/ddp.js?d1840d3ba04c65ffade261f362e26699b7509706:4970:9)
    at onMessage (http://localhost:3000/packages/ddp.js?d1840d3ba04c65ffade261f362e26699b7509706:3725:12)
    at http://localhost:3000/packages/ddp.js?d1840d3ba04c65ffade261f362e26699b7509706:2717:11
    at Array.forEach (native)
    at Function._.each._.forEach (http://localhost:3000/packages/underscore.js?0a80a8623e1b40b5df5a05582f288ddd586eaa18:156:11)
    at _.extend._launchConnection.self.socket.onmessage (http://localhost:3000/packages/ddp.js?d1840d3ba04c65ffade261f362e26699b7509706:2716:11)

应用程序/lib/控制器/admin_controller.js

onBeforeAction: function () {
    var me = this;
    if(!Meteor.userId()) {
        Router.go('signin');
    } else {
        Meteor.call('accounts/hasAdminRole', function(err, r) {
            if(!err && r) {
                console.log('success');
                console.log(me);
                me.next()
            } else {
                toastr.error('Not Authorized.', 'Error!');
                Router.go('home');
            }
        });
    }
},

app/服务器/methods.js

'accounts/hasAdminRole': function() {
    return Roles.userIsInRole( Meteor.user() , ['admin'] );
}

谢谢你的回答!

Answer 1

您可以直接将this.next函数存储在me变量中，并像这样调用它:

onBeforeAction: function () {
    var me = this.next;
    if(!Meteor.userId()) {
        Router.go('signin');
    } else {
        Meteor.call('accounts/hasAdminRole', function(err, r) {
            if(!err && r) {
                console.log('success');
                me();
            } else {
                toastr.error('Not Authorized.', 'Error!');
                Router.go('home');
            }
        });
    }
},