如何在meteor中干掉模板助手？

我的模板助手有重复的代码：

Template.foodMenu.helpers({
  breakfast: function() {
    var breakfastItems = EatingTimes.find(// query for breakfast items);
    // function to sort breakfastItems in here (code duplication)
  },
  lunch: function() {
    var lunchItems = EatingTimes.find(// query for lunch items);
    // function to sort lunchItems in here (code duplication)
  },
  dinner: function() {
    var dinnerItems = EatingTimes.find(// query for dinner items);
    // function to sort breakfastItems in here (code duplication)
  }
);

Template.foodMenu.helpers({
  breakfast: function() {
    var breakfastItems = EatingTimes.find(// query for breakfast items);
    sortFoodItems(breakfastItems);
  },
  lunch: function() {
    var lunchItems = EatingTimes.find(// query for lunch items);
    sortFoodItems(lunchItems);
  },
  dinner: function() {
    var dinnerItems = EatingTimes.find(// query for dinner items);
    sortFoodItems(dinnerItems);
  }
);

我想把它擦干：

Template.foodMenu.helpers({
  breakfast: function() {
    var breakfastItems = EatingTimes.find(// query for breakfast items);
    // function to sort breakfastItems in here (code duplication)
  },
  lunch: function() {
    var lunchItems = EatingTimes.find(// query for lunch items);
    // function to sort lunchItems in here (code duplication)
  },
  dinner: function() {
    var dinnerItems = EatingTimes.find(// query for dinner items);
    // function to sort breakfastItems in here (code duplication)
  }
);

Template.foodMenu.helpers({
  breakfast: function() {
    var breakfastItems = EatingTimes.find(// query for breakfast items);
    sortFoodItems(breakfastItems);
  },
  lunch: function() {
    var lunchItems = EatingTimes.find(// query for lunch items);
    sortFoodItems(lunchItems);
  },
  dinner: function() {
    var dinnerItems = EatingTimes.find(// query for dinner items);
    sortFoodItems(dinnerItems);
  }
);

我应该将此函数放置在何处以便干燥？如何给它命名，以便正确地调用它？如果有区别的话，我使用的是熨斗路由器。

var sortFoodItems = function (foodItems) { 
  // code to sort out and return foodItems to particular method that calls it   
};

---

只需在同一文件中的helpers之前定义函数

var sortFoodItems = function (foodItems) { 
  // code to sort out and return foodItems to particular method that calls it   
};

Template.foodMenu.helpers({
  breakfast: function() {
    var breakfastItems = EatingTimes.find(/* query for breakfast items */);
    sortFoodItems(breakfastItems);
  },
  lunch: function() {
    var lunchItems = EatingTimes.find(/* query for lunch items */);
    sortFoodItems(lunchItems);
  },
  dinner: function() {
    var dinnerItems = EatingTimes.find(/* query for dinner items */);
    sortFoodItems(dinnerItems);
  }
});

如果要在多个文件中使用sortFoodItems函数，请创建名为lib的文件夹，并将该函数放在file functions.js中（不带var关键字），使其成为全局函数。例如：

//lib/functions.js
sortFoodItems = function (foodItems) { 
  // code to sort out and return foodItems to particular method that calls it   
};

---

您需要了解Meteor是如何读取项目目录的。阅读更多关于流星文档

您还可以使用

Template.registerHelper（名称、函数）

为此创建一个全局帮助程序，该帮助程序如下所示：

Template.registerHelper('menuItems', function(eatingTime, sortCriteria) {
  //do some checking of your arguments
  eatingTime = eatingTime || '/* your default eating time */';
  sortCriteria = sortCriteria || {/* your default sort criteria */};
  check(eatingTime, String);
  check(sortCriteria, Object);

  //find and sort your items in one mongo query or you could do separate find and sort if you want
  menuItems = EatingTimes.find({time: eatingTime}, sortCriteria);

  return menuItems; 
});

这将是使代码干涸的最快的方法

然后在模板中，您可以将其称为：

{{#each menuItems 'time args' 'sort arg'}}

---

只需将它与您的助手放在同一个文件中（在顶层）？