我正在使用快速框架,并希望连接到
mongodb而不使用mongoose,但使用本机nodejs
Mongodb驱动程序.如何在不创建新连接的情况下执行此操作？
为了处理get或post请求,我当前为每个请求打开一个与db的新连接,并在请求完成时关闭它.有一个更好的方法吗？提前致谢.
解决方法
按照我的评论示例,修改它以便应用程序处理错误而不是无法启动服务器.
var express = require('express');
var mongodb = require('mongodb');
var app = express();
var MongoClient = require('mongodb').MongoClient;
var db;
// Initialize connection once
MongoClient.connect("mongodb://localhost:27017/integration_test",function(err,database) {
if(err) return console.error(err);
db = database;
// the Mongo driver recommends starting the server here because most apps *should* fail to start if they have no DB. If yours is the exception,move the server startup elsewhere.
});
// Reuse database object in request handlers
app.get("/",function(req,res,next) {
db.collection("replicaset_mongo_client_collection").find({},docs) {
if(err) return next(err);
docs.each(function(err,doc) {
if(doc) {
console.log(doc);
}
else {
res.end();
}
});
});
});
app.use(function(err,req,res){
// handle error here. For example,logging and returning a friendly error page
});
// Starting the app here will work,but some users will get errors if the db connection process is slow.
app.listen(3000);
console.log("Listening on port 3000");
