Mongoose，子文档是对象而不是 json [英] Mongoose, sub document is objects and not json

问题描述

我正在使用 mongoose 查询我的 mongodb，但我不明白为什么返回的子文档只是 Object 类型，而不是 JSON.

I am querying my mongodb using mongoose, but i don't understand why the returned sub docs are just of type Object, instead of JSON.

使用

  hero.find({} ,{'deck' : {$elemMatch:{name:'Guard Tower'}}}, function(err, tower) {
    console.log(tower);
  }

返回

[ { _id: 507ac406ba6ecb1316000001,
    deck: 
     [ { name: 'Guard Tower',
         description: 'This tower shoots stuff.',
         cost: 13,
         sellValue: 7,
         radius: 180,
         speed: 40,
         dmg_min: 0,
         dmg_max: 0,
         actual_height: 40,
         sprite: 'guardtower_red.png',
         anim: [Object],
         size: [Object],
         projectile: [Object],
         upgrade: [Object] } ] } ]

动画、大小、弹丸、升级等子文档，是对象，需要嵌套信息，如何获取信息?不进行其他查询?

Subdocument like anim, size, projectile, upgrade, is Object, i need the information nested, how can i get the information? Without making another query?

推荐答案

所有的文档和子文档都是 JavaScript 中的对象.只是 console.log 在调用 util.inspect 时使用默认深度 2 来格式化您的文档以进行输出.您可以通过调用 util.inspect 自己:

The all docs and subdocs are objects in JavaScript. It's just that console.log uses the default depth of 2 when calling util.inspect to format your document for output. You can output all levels of the document by calling util.inspect yourself:

var util = require('util');

hero.find({} ,{'deck' : {$elemMatch:{name:'Guard Tower'}}}, function(err, tower) {
    console.log(util.inspect(tower, false, null)); 
});

这篇关于Mongoose，子文档是对象而不是 json的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！