使用mongoose操作mongoDB

mongoDB是无模式的，mongoose是既可以支持无模式也可以支持有模式。

创建model：

const mongoose = require(‘mongoose');

mongoose.Promise = require('bluebird');

mongoose.connect('mongodb://localhost/Mongoose');

const BookSchema = new mongoose.Schema({

Name:String,

Author:String,

PublishTime:Date

});

module.exports = mongoose.model(‘Book',BookSchema);

*:注意这里可能会出现问题：(node:4104) DeprecationWarning: Mongoose: mpromise (mongoose's default promise library) is deprecated, plug in your own promise library instead: http://mongoosejs.com/docs/promises.html；

此时可以使用bluebird实现的promise替代：

mongoose.Promise = require(‘bluebird’);

插入操作：

const mongoose = require('mongoose');

require('./models.js');

const Book = mongoose.model('Book');

const book = new Book({

Name:'Web Development',

Author:'James',

PublishTime:new Date()

});

//book.Author = 'Curry';

book.save(err=>{

console.log('save ',err ? 'falied' : 'success');

});

查询操作：

const mongoose = require('mongoose');

require('./models.js');

const book = mongoose.model('Book');

book.find({},(err,docs)=>{

if (err) console.log(err);

console.log(docs);

});

条件查询操作：

/**

* Created by w on 2017/4/20.

*/

const mongoose = require('mongoose');

require('./models');

const book = mongoose.model('Book');

const conditions = {

$or: [{Author: 'James'},

{Author:'Curry'}]

};

book.find(conditions,(err,docs)=>{

if (err) console.log(err);

console.log(docs);

});