20160919學(xué)習(xí)筆記 Node.js操作MongoDB

insert

//引入mongoose模塊
var mongoose = require('mongoose');
// 創(chuàng)建一個(gè)鏈接，并選擇數(shù)據(jù)庫
var db = mongoose.createConnection('mongodb://localhost:27017/jobs_db');
// 設(shè)置數(shù)據(jù)類型
var monSchema = new mongoose.Schema({
    name: { type: String, default: 'jobs' },
    age: { type: Number, min: 18, index: true },
    sex:{type:String}

});

//選擇一個(gè)集合
var monModel = db.model('users', monSchema);
//待插入的數(shù)據(jù)
var content = {name: '喬布斯2', age:30, sex: '男'};
//實(shí)例化一條記錄
var monInsert = new monModel(content);
//執(zhí)行保存數(shù)據(jù)
monInsert.save(function (err) {
    if (err) {
        console.log(err);
    } else {
        console.log('save data successfully!');
    }
});

find

//引入mongoose模塊
var mongoose = require('mongoose');
// 創(chuàng)建一個(gè)鏈接，并選擇數(shù)據(jù)庫
var db = mongoose.createConnection('mongodb://localhost:27017/jobs_db');
// 設(shè)置數(shù)據(jù)類型
var monSchema = new mongoose.Schema({
    name: { type: String, default: 'jobs' },
    age: { type: Number, min: 18, index: true },
    sex:{type:String}

});

//選擇一個(gè)集合
var monModel = db.model('users', monSchema);
//查詢的條件
var content = {name: '喬布斯'};
//查詢的key value
var field = {name: 1, age: 1,sex:1};
//待查詢的數(shù)據(jù)
monModel.find(content,field,function (err, result) {
    if(err) {
        console.log(err);
    }else{
        console.log(result);
    }
})

update

//引入mongoose模塊
var mongoose = require('mongoose');
// 創(chuàng)建一個(gè)鏈接，并選擇數(shù)據(jù)庫
var db = mongoose.createConnection('mongodb://localhost:27017/jobs_db');
// 設(shè)置數(shù)據(jù)類型
var monSchema = new mongoose.Schema({
    name: { type: String, default: 'jobs' },
    age: { type: Number, min: 18, index: true },
    sex:{type:String}

});

//選擇一個(gè)集合
var monModel = db.model('users', monSchema);
//修改的條件
var content = {name: '喬老大'};

//修改后的內(nèi)容
var newData = {$set: {sex: '女',age:'16'}};

monModel.update(content, newData, function (err, result) {
    if (err) {
        console.log(err);
    } else {
        console.log("It's OK!");
    }
});

remove

//引入mongoose模塊
var mongoose = require('mongoose');
// 創(chuàng)建一個(gè)鏈接，并選擇數(shù)據(jù)庫
var db = mongoose.createConnection('mongodb://localhost:27017/jobs_db');
// 設(shè)置數(shù)據(jù)類型
var monSchema = new mongoose.Schema({
    name: { type: String, default: 'jobs' },
    age: { type: Number, min: 18, index: true },
    sex:{type:String}

});

//選擇一個(gè)集合
var monModel = db.model('users', monSchema);
//條件
var content = {name: '喬老大'};

//刪除
monModel.remove(content,  function (err, result) {
    if (err) {
        console.log(err);
    } else {
        console.log("It's OK!");
    }
});