asked on

fail to connect to mongo db

hi am geting this error when trying to connect to my mongo
nodemon] starting `node server.js`
(node:6648) DeprecationWarning: current URL string parser is deprecated, and will be removed in a future version. To use the new parser, pass option { useNewUrlParser: true } to MongoClient.connect.
(node:6648) DeprecationWarning: current Server Discovery and Monitoring engine is deprecated, and will be removed in a future version. To use the new Server Discover and Monitoring engine, pass option { useUnifiedTopology: true } to the MongoClient constructor.
Connection failed!
[nodemon] restarting due to changes...
[nodemon] starting `node server.js`
(node:17788) DeprecationWarning: current Server Discovery and Monitoring engine is deprecated, and will be removed in a future version. To use the new Server Discover and Monitoring engine, pass option { useUnifiedTopology: true } to the MongoClient constructor.
Connection failed!

this my connection code

const express = require("express");
const bodyParser = require("body-parser");
const mongoose = require("mongoose");

const Post = require("./models/post");

const app = express();

const connectUrl = 'mongodb+srv://username:yxchH2sxBVh46LHB@mongodbcl-ws2rs.mongodb.net/test?retryWrites=true&w=majority';
 
const connectConfig = { 
  useNewUrlParser: true, 
  
}


mongoose.connect(connectUrl, connectConfig)
  .then(() => {
    console.log("Connected to database!");
  })
  .catch(() => {
    console.log("Connection failed!");
  });



app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));

app.use((req, res, next) => {
  res.setHeader("Access-Control-Allow-Origin", "*");
  res.setHeader(
    "Access-Control-Allow-Headers",
    "Origin, X-Requested-With, Content-Type, Accept"
  );
  res.setHeader(
    "Access-Control-Allow-Methods",
    "GET, POST, PATCH, DELETE, OPTIONS"
  );
  next();
});

app.post("/api/posts", (req, res, next) => {
  const post = new Post({
    title: req.body.title,
    content: req.body.content
  });
  post.save().then(createdPost => {
    res.status(201).json({
      message: "Post added successfully",
      postId: createdPost._id
    });
  });
});

app.get("/api/posts", (req, res, next) => {
  Post.find().then(documents => {
    res.status(200).json({
      message: "Posts fetched successfully!",
      posts: documents
    });
  });
});

app.delete("/api/posts/:id", (req, res, next) => {
  Post.deleteOne({ _id: req.params.id }).then(result => {
    console.log(result);
    res.status(200).json({ message: "Post deleted!" });
  });
});

module.exports = app;

Open in new window

leakim971

lines 21,22,23 :

  .catch((err) => {     
       console.log("Connection failed!", err.stack);   // so you will know more about why it fail
   });

Open in new window

chalie001

ASKER

am geting

ode:25868) DeprecationWarning: current Server Discovery and Monitoring engine is deprecated, and will be removed in a future version. To use the new Server Discover and Monitoring engine, pass option { useUnifiedTopology: true } to the MongoClient constructor.
Connection failed! MongoNetworkError: failed to connect to server [mongodbcl-shard-00-01-ws2rs.mongodb.net:27017] on first connect [MongoNetworkError: connection 5 to mongodbcl-shard-00-01-ws2rs.mongodb.net:27017 closed]
at Pool.<anonymous> (C:\solution2\mean\mongodb-03-finished\node_modules\mongodb\lib\core\topologies\server.js:438:11)
at Pool.emit (events.js:198:13)
at createConnection (C:\solution2\mean\mongodb-03-finished\node_modules\mongodb\lib\core\connection\pool.js:561:14)
at connect (C:\solution2\mean\mongodb-03-finished\node_modules\mongodb\lib\core\connection\pool.js:1008:9)
at callback (C:\solution2\mean\mongodb-03-finished\node_modules\mongodb\lib\core\connection\connect.js:97:5)
at runCommand (C:\solution2\mean\mongodb-03-finished\node_modules\mongodb\lib\core\connection\connect.js:124:7)
at _callback (C:\solution2\mean\mongodb-03-finished\node_modules\mongodb\lib\core\connection\connect.js:349:5)
at Connection.errorHandler (C:\solution2\mean\mongodb-03-finished\node_modules\mongodb\lib\core\connection\connect.js:365:5)
at Object.onceWrapper (events.js:286:20)
at Connection.emit (events.js:198:13)
at TLSSocket.<anonymous> (C:\solution2\mean\mongodb-03-finished\node_modules\mongodb\lib\core\connection\connection.js:370:12) at Object.onceWrapper (events.js:286:20)
at TLSSocket.emit (events.js:198:13)
at _handle.close (net.js:606:12)
at TCP.done (_tls_wrap.js:388:7)

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leakim971

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chalie001

ASKER

its in cloud i did change ip it work

leakim971

don't forget to close the question, I believe this comment << you should be sure about the connexion between your server and it >> describe your issue