从meteor mongodb中找到一个javascript数组 [英] find in a javascript array from meteor mongodb

问题描述

这是有效的

Template.kanjifinder.kanjicharacters = function () {
    console.log("kanjlist");
    return kanji.find({cardid: {$in:[1,2]}}, {sort: {cardid: 1}});  
};

但有没有办法替换这个硬编码数组 [1,2] 带有javascript数组？

but is there a way to replace this hardcoded array [1,2] with a javascript array?

var str = "123456"
var cardids = str.split("");

if (Meteor.isClient) {
    Template.kanjifinder.kanjicharacters = function () {
        console.log("kanjlist");
        return kanji.find({cardid: {$in: **cardids** }}, {sort: {cardid: 1}});  
    } 
};

推荐答案

您只需在字符串中使用分隔符，你也可以在你的代码中这样做，但问题是2位数字：

You just need to use a separator in your string, you could do it that way in your code too, but the problem is 2 digit numbers:

var str = "1,2,3,4,5,6" //<<--- use a seperator here
var cardids = str.split(","); //<<--

//remove this line if you intend to use strings in your db instead of integers
cardids = _.map(function(card) { return parseInt(card);});

if (Meteor.isClient) {
   Template.kanjifinder.kanjicharacters = function () {
     console.log("kanjlist");
     return kanji.find({cardid: {$in:cardids}}, {sort: {cardid: 1}});  
   };
}

我正在使用下划线将字符串转换为整数，如果你不是已经将它添加到您的流星包中 meteor add underscore

I'm using underscore to convert the strings to integers, if you don't already have it add it to your meteor package with meteor add underscore

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