Meteor:从另一个助手访问模板助手(或变量) [英] Meteor: Access Template Helper (or variable) from another helper

问题描述

如何从另一个模板助手中引用模板助手?例如...

How can I reference a template helper from another one? For example...

Template.XXX.helpers({
    reusableHelper: function() {
        return this.field1 * 25 / 100; //or some other result
    },
    anotherHelper: function() {
        if (this.reusableHelper() > 300) //this does not work
            return this.reusableHelper() + ' is greater than 300'; 
        else
            return this.reusableHelper() + ' is smaller than 300';
    }
});

我也尝试过 Template.instance().__helpers.reusableHelper - 都没有运气.

I have also tried Template.instance().__helpers.reusableHelper - all with no luck.

或者，有没有办法定义反应式模板实例变量?

Alternatively is there a way to define reactive Template instance variables?

XXX 是在同一页面上多次呈现的子模板.

XXX is a sub-template that renders multiple times on the same page.

推荐答案

这就像使用公共代码一样，您可以制作另一个包含可重用代码的 javascript 函数，并在您需要的任何地方调用它.

This like using of common code, you can make another javascript function which contains the your reusable code and call it from wherever you required.

就像在您的代码中一样-

Like in your code-

function calcField(field){
   return field * 25 / 100
}

在你的模板助手中-

Template.XXX.helpers({
    reusableHelper: function() {
        return calcField(this.field1); 
    },
    anotherHelper: function() {
        if (calcField(this.field1) > 300) 
            return calcField(this.field1) + ' is greater than 300'; 
        else
            return calcField(this.field1) + ' is smaller than 300';
    }
});

和

或者有一种方法可以定义反应式模板实例变量?

Alternatively is there a way to define reactive Template instance variables?

您可以使用 会话变量 或 反应变量

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