Template.tmpl.helpers()中Iron-Router RouteController中的调用方法不起作用

每次尝试调用loadMoreClients方法时，我都尝试将新数据推送到我的clients数组中.该出版物期望此back_to参数，并且知道如何处理它.我的问题是我似乎无法从模板助手中调用这些方法.

I'm trying to push new data on to my clients array each time the loadMoreClients method is called. The publication is expecting this back_to parameter and knows how to handle it. My problem is that I can't seem to call these methods from my Template helpers .

我在控制台上登录了Iron和Iron.controller，这两个都存在并且向我展示了我期望看到的内容.我似乎找不到当前的文档或如何从模板助手中访问Iron.controller()方法/属性的示例

I logged Iron and Iron.controller to the console and both of those exist and are showing me what I expected to see. I just can't seem to find current docs or examples of how to access Iron.controller() methods/properties from my Template helpers

这是我的RouteController代码:

Here is my RouteController code:

ClientController = ApplicationController.extend({
action : function(){
    this.render(Router.current().route.getName())
},

data : function(){
    if( this.params._id ){
        return Clients.findOne({ _id:this.params._id })
    }
},

waitOn : function(){
    return [
        Meteor.subscribe('directory'),
        Meteor.subscribe('clients')
    ]
},

loadMoreClients : function(){
    this.months_back += 3
    this.back_to = moment().subtract(this.months_back,'months').startOf('day')
    this.clients.push(Meteor.subscribe('clients', {back_to:this.back_to, skip:this.clients.length}))
},

loadAllClients : function(){
    this.clients.push(Meteor.subscribe('clients', {back_to:this.start_of_time, skip:this.clients.length}))
},

// we'll use these properties to 'load more' client data
clients : [],
back_to : moment().subtract(3,'months').startOf('day'),
months_back : 3,
start_of_time : moment(new Date(0))
})

这是我的助手代码:

Template.client_list.helpers({
clients : function(){
    var clients = []
    Iron.controller().clients.forEach(function(client){
        // ... some stuff here...
        clients.push(client)
    })

    return clients
},

earliestClientLoaded : function(){
    var controller = Iron.controller()
    return controller.clients[controller.clients.length - 1].createdAt
}
})

Template.client_list.events({
'click .btn-load-more' : function(e){
    e.preventDefault()

    Iron.controller().loadMoreClients()
},

'click .btn-load-all' : function(e){
    e.preventDefault()

    Iron.controller().loadAllClients()
}
})

在Iron.controller()和loadAllClients方法的Iron.controller()调用中出现undefined function错误.

I'm getting undefined function errors on my Iron.controller() calls to loadMoreClients and loadAllClients methods.

我在这里做什么错了?