在流星事件处理程序中访问模板帮助器字典 [英] Accessing template helper dictionary in Meteor event handler
问题描述
在Meteor中,我要将两个对象从数据库发送到模板:
In Meteor, I'm sending two objects from my db to a template:
Template.myTemplate.helpers({
helper1: function() {
var object1 = this; // data context set in iron:router...path is context dependent
// modify some values in object1
return this;
},
helper2: function() {
return Collection2.find({_id: this.object2_id});
}
});
此模板还具有事件处理程序,用于修改上面的两个对象.我试图从上面访问helper1和helper2,但是如果我调用模板的数据上下文,则只能访问object1的未修改版本.如何访问上面定义的助手?
This template also has an event handler to modify the two objects above. I am trying to access helper1 and helper2 from above, but if I call the data context of the template, I only get access to the unmodified version of object1. How do I access the helpers defined above?
Template.myTemplate.events({
'submit form': function(event) {
event.preventDefault();
// Access helper2 object and attributes here instead of calling Collection2.find() again
}
});
推荐答案
Helpers只是函数,因此可以随意传递并分配给其他变量,因此您可以定义一个函数,然后将其分配给helper2键.模板助手,并使用事件处理程序中的原始引用进行调用.
Helpers are just functions and thus can be passed around and assigned to other variables at will, so you could define a function and then assign it the helper2 key of the template helpers and call by it's original reference from the event handler.
var helperFunction = function() {
return Collection2.find({_id: this.object2_id});
};
Template.myTemplate.helpers({
helper1: function() {
var object1 = this; // data context set in iron:router...path is context dependent
// modify some values in object1
return this;
},
helper2: helperFunction
});
Template.myTemplate.events({
'submit form': function(event) {
event.preventDefault();
var cursor = helperFunction();
}
});
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