如何使用mongoose将文档插入mongodb并获取生成的ID? [英] How to insert a doc into mongodb using mongoose and get the generated id?

问题描述

我正在使用猫鼬来操作mongodb.现在，为了进行测试，我想通过本机连接将一些数据插入到mongodb中.

I'm using mongoose to operate mongodb. Now, for testing, I want to inserting some data into mongodb by native connection.

但是问题是插入后如何获取生成的ID?

But the question is how to get the generated id after inserting?

我尝试过:

var mongoose = require('mongoose');

mongoose.connect('mongo://localhost/shuzu_test');

var conn = mongoose.connection;

var user = {
    a: 'abc'
};

conn.collection('aaa').insert(user);

console.log('User:');
console.log(user);

但它会打印:

{ a: 'abc' }

没有_id字段.

推荐答案

您可以自己生成_id并将其发送到数据库.

You can generate _id yourself and send it to the database.

var ObjectID = require('mongodb').ObjectID;

var user = {
  a: 'abc',
  _id: new ObjectID()
};

conn.collection('aaa').insert(user);

这是我最喜欢的MongoDB功能之一.如果需要创建彼此链接的许多对象，则无需在app和db之间进行大量往返.您可以在应用中生成所有ID，然后只需插入所有内容即可.

This is one of my favourite features of MongoDB. If you need to create a number of objects, that are linked to each other, you don't need to make numerous round-trips between app and db. You can generate all ids in the app and then just insert everything.

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