Meteor - 从子助手访问父模板变量

Question

I cannot get and set the parent template variable from within the child helper. I have read plenty of pages on the issue but I'm stuck ...

Template.parent.onCreated(function() {  
    this.myVar = new ReactiveVar('xyz');
});  

is expected to be accessible in child like this:

Template.child.helpers({
setAndGetIt : function() {
    Template.parentData(1).myVar = 'testString';
    return Template.parentData(1).myVar;

}});

where

<template name="parent>    
    {{>child}}  
</template>  

Do I miss something? (Sessions solution is not a case here...)

Answer 1

There's a smarter way to accomplish this task. But you need to explicitly declare which variables you want to be accessible in the child template. and most probably you want that var to be reactive.

Template.parentTemplate.onCreated(function(){
    this.myVar = new ReactiveVar('hello');
});

in Blaze, you need to pass this variable when calling the child template like this.

{{>child myVar=myVar }}

Template.child.onRendered(function(){
    console.log(this.myVar.get());
});