About Mongoose Connection MongoDB repeated access error resolution _MARIADB

The specific code looks like this:

var express = require (' Express ');
var mongoose = require (' Mongoose ');
var router = Express. Router ();
var person = Mongoose.model (' person ', {
 id:number,
 name:string
});
/* Add/*
router.get ('/insert ', function (req, res) {
 var student = new Person ({
  id:1,
  name: "Huop"
 });
 Mongoose.connect ("Mongodb://localhost:27017/test");
 Student.save (function (e, product, numberaffected) {
  if (e) res.send (e.message);
  var html = "
new data is:" + json.stringify (product);
  HTML + + "
affect the amount of data is:" + numberaffected;
  Res.send (HTML);
 }
); Router.get ('/find ', function (request, response) {
 mongoose.connect ("Mongodb://localhost:27017/test");
 Person.find ({
  id:1
 }, Function (e, docs) {
  if (e) response.send (e.message);
  var html = "The
 queried data is:" + json.stringify (docs);
  Response.send (HTML);
 });

The above code can be performed normally, but there is a problem, is the first visit when normal, but the refresh will be an error, trying to open unclosed connection.undefined
error:trying to open unclosed connection.

Should be repeatedly open connection failure error, so need to close the connection, I added a section of the code to close the connection, the result of the query results: The query to the data: Unde

So how do you handle the MongoDB database connection?

The solution is as follows:

Create a new mongoose.js:

var mongoose = require (' Mongoose ');
Mongoose.connect (' Mongodb://localhost/nuaidibi ');
Module.exports = Mongoose;

In each module, reference

var mongoose = require ('./mongoose.js '); Use the same as the following, without the switch connection.