NodeJs操作mongoDB（增删查改）

准备

1.通过npm命令安装mongodb

2.安装mongodb数据库

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('连接成功!');
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) {
//连接到表
var collection = db.collection('vip');
//查询数据
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("连接成功！");
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("连接成功!");
updateData(db);
});

function updateData(db)
{
var devices = db.collection('vip');
var whereData = {"name":"node"}
var updateDat = {$set: {"age":26}}; //如果不用$set，替换整条数据
devices.update(whereData, updateDat, function(error, result){
if (error) {
console.log('Error:'+ error);
}else{
console.log(result);
}
db.close();
});
}

4.删除

var MongoClient = require('mongodb').MongoClient;
var DB_URL = "mongodb://localhost:27017/chm";

MongoClient.connect(DB_URL, function(error, db){
console.log("连接成功");
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();
})
}

存储过程

在mongodb中创建存储过程

所有存储过程都存放在db.system.js中，通过db.eval(“存储过程ID()”);调用存储过程。
在代码中调用：
 

var MongoClient = require("mongodb").MongoClient;
var DB_URL = "mongodb://localhost:27017/chm";

MongoClient.connect(DB_URL, function(error,db){
console.log("连接成功!");
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();
});
}

更多操作：
https://www.cnblogs.com/vsmart/p/7700012.html