Node.js和MongoDB的使用-优快云博客

本文介绍了如何使用Node.js连接MongoDB数据库并进行基本操作，包括创建数据库和集合、插入数据及查询等。此外还提到了如何利用Mongoose简化开发流程。

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连接数据库和集合

'use strict';

const mongodb = require('mongodb');
const mongodb_server = new mongodb.Server('127.0.0.1', 27017, {});
const mongodb_client = new mongodb.Db('mydb', mongodb_server, {w: 1});

mongodb_client.open((err) => {
    if (err) {
        console.log('open db error');
        throw err;
    } else {
        mongodb_client.collection('myset', (err, coll) => {
            if (err) {
                console.log('open collection error');
                throw err;
            } else {
                console.log('ready to play');
            }
        });
    }
});

对集合插入数据

'use strict';

const mongodb = require('mongodb');
const mongodb_server = new mongodb.Server('127.0.0.1', 27017, {});
const mongodb_client = new mongodb.Db('mydb', mongodb_server, {w: 1});

class Student {
    constructor(name, age) {
        this.name = name;
        this.age = age;
    }
    show() {
        console.log('my name is %s, my age is %d .', name, age);
    }
};

var arr = [ new Student('ming', 20), new Student('hong', 18) ];

mongodb_client.open((err) => {
    if (err) {
        console.log('open db error');
        throw err;
    } else {
        mongodb_client.collection('myset', (err, coll) => {
            if (err) {
                console.log('open coll error');
                throw err;
            } else {
                console.log('ready to play');
                
                for (var idx in arr) {
                    coll.insert(arr[idx], {safe: true}, (err, doc) => {
                        if (err) {
                            console.log('insert doc error');
                            throw err;
                        } else {
                            console.log('insert doc success');
                        }
                    });
                }

                coll.find().toArray((err, res) => {
                    if (err) {
                        console.log('find coll error');
                        throw err;
                    } else {
                        console.log(res);
                        console.log('find coll success');
                    }
                });
            }
        });
    }
});

使用Mongoose

转载于:https://my.oschina.net/nichijou/blog/748011