以对象而不是数组的形式获取MongoDB结果 [英] get MongoDB results as objects instead of array

问题描述

我是MongoDB的新手，我试图以不同的方式获得结果.

I'm new to MongoDB, and I'm trying to get results in a different way.

如果我执行查询db.collection.find().toArray()，我将得到类似的东西:

if I execute the query db.collection.find().toArray() I get something like:

[
  {
    "_id":"34234...",
    "first":"Mark",
    "last":"Marker"
  },
  {
    "_id": "34235...",
    "first":"Adam",
    "last":"Smith"
  }
]

是否有一个api可以让您接收以下结果?

is there an api that lets you to receive the results as the following?:

{
 "results" : {

  "34234..." :{
    "_id":"34234...",
    "first":"Mark",
    "last":"Marker"
  },
  "4235..." :{
    "_id": "34235...",
    "first":"Adam",
    "last":"Smith"
  }

 }

还是我需要获取结果数组并迭代每个对象并建立响应?(我想避免单光标迭代)

Or I need to get the results array and iterate every single object and build my response? (I would like to avoid the single cursor iteration)

推荐答案

我不认为有针对此的本机API函数. cursor.toArray()从头开始遍历光标中的每个项目，因此我不必为此担心太多.我们可以跳过 toArray()并进行自己的迭代:

I don't believe there's a native API function for that. cursor.toArray() goes through each item in the cursor begin with, so I wouldn't worry too much about that. We can just skip the toArray() and do our own iteration:

var obj = {}
db.collection.find().each(function(item){
  obj[item._id] = item;
});

我认为这真的不会变慢.

I don't think that would really be any slower.

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