準(zhǔn)備
1.通過(guò)npm命令安裝mongodb
2.安裝mongodb數(shù)據(jù)庫(kù)，這里不詳細(xì)介紹了，安裝網(wǎng)址：http://www.survivalescaperooms.com/article/82522.htm
CRUD操作
在此之前應(yīng)對(duì)MongoDB數(shù)據(jù)庫(kù)有所了解，知道它的一些增刪查改命令。
1.增加
var MongoClient = require("mongodb").MongoClient;var DB_URL = "mongodb://localhost:27017/chm";function insertData(db){ var devices = db.collection('vip'); var data = {"name":"node","age":22,"addr":"nb","addTime":new Date()}; devices.insert(data,function(error, result){ if(error) { console.log('Error:'+ error); }else{ console.log(result.result.n); } db.close(); });} MongoClient.connect(DB_URL, function(error, db){ console.log('連接成功!'); insertData(db);});2.查找
var mongodb = require('mongodb')var MongoClient = require('mongodb').MongoClient;var DB_CONN_STR = 'mongodb://localhost:27017/chm'; var selectData = function(db, callback) { //連接到表 var collection = db.collection('vip'); //查詢數(shù)據(jù) var whereStr = {"name":'node'}; collection.find(whereStr,function(error, cursor){ cursor.each(function(error,doc){ if(doc){ //console.log(doc); if (doc.addTime) { console.log("addTime: "+doc.addTime); } } }); });}MongoClient.connect(DB_CONN_STR, function(err, db) { console.log("連接成功！"); selectData(db, function(result) { console.log(result); db.close(); });});3.更新
var MongoClient = require("mongodb").MongoClient;var DB_URL = "mongodb://localhost:27017/chm";MongoClient.connect(DB_URL, function(error, db){ console.log("連接成功!"); updateData(db);});function updateData(db){ var devices = db.collection('vip'); var whereData = {"name":"node"} var updateDat = {$set: {"age":26}}; //如果不用$set，替換整條數(shù)據(jù) devices.update(whereData, updateDat, function(error, result){ if (error) { console.log('Error:'+ error); }else{ console.log(result); } db.close(); });}4.刪除
var MongoClient = require('mongodb').MongoClient;var DB_URL = "mongodb://localhost:27017/chm";MongoClient.connect(DB_URL, function(error, db){ console.log("連接成功"); deleteData(db);});function deleteData(db){ var devices = db.collection('vip'); var data = {"name":"node"}; devices.remove(data, function(error, result){ if (error) { console.log('Error:'+ error); }else{ console.log(result.result.n); } db.close(); })}存儲(chǔ)過(guò)程
在mongodb中創(chuàng)建存儲(chǔ)過(guò)程
所有存儲(chǔ)過(guò)程都存放在db.system.js中，通過(guò)db.eval(“存儲(chǔ)過(guò)程ID()”);調(diào)用存儲(chǔ)過(guò)程。
在代碼中調(diào)用：
var MongoClient = require("mongodb").MongoClient;var DB_URL = "mongodb://localhost:27017/chm";MongoClient.connect(DB_URL, function(error,db){ console.log("連接成功!"); callProcess(db)});function callProcess(db){ db.eval("get_vip_count()",function(error, result){ if (error) { console.log(error); }else{ console.log("count:"+result); } db.close(); });}以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持VeVb武林網(wǎng)。
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