What I want to accomplish is probably the simplest thing ever. I just want to connect to mongodb atlas free tier M0 in nodejs using mongodb driver. I already have created a free account and cluster.
Here is my simple code:
const mongoclient = require('mongodb').MongoClient;
const URI = 'mongodb+srv://mohammed:mypassword#lebran-0qf7m.gcp.mongodb.net/test?retryWrites=true';
mongoclient.connect(URI, { useNewUrlParser: true }, (err, client) => {
if(err) throw err;
console.log('mongodb connected');
db = client.db('mern');
})
Here is what happens when I run the file:
Mohammeds-MacBook-Pro:mern ahmed$ node server.js
/Users/ahmed/Projects/mern/server.js:13
if(err) throw err;
^
Error: queryTxt ESERVFAIL lebran-0qf7m.gcp.mongodb.net
at QueryReqWrap.onresolve [as oncomplete] (dns.js:199:19)
I also tried mongo shell with the following command:
mongo "mongodb+srv://lebran-0qf7m.gcp.mongodb.net/mern" --username mohammed
here is the output I get:
MongoDB shell version v4.0.6
Enter password:
connecting to: mongodb://lebran-shard-00-00-0qf7m.gcp.mongodb.net.:27017,lebran-shard-00-01-0qf7m.gcp.mongodb.net.:27017,lebran-shard-00-02-0qf7m.gcp.mongodb.net.:27017/mern?gssapiServiceName=mongodb&ssl=true
2019-02-20T22:48:57.232+0300 E QUERY [js] Error: Authentication failed. :
connect#src/mongo/shell/mongo.js:343:13
#(connect):1:6
exception: connect failed
I am sure I enter my password right. I have changed several ones and none of them work. I have my IP listed as white list. I also have an admin account. All the prerequisites I can think of.
I am able to connect to the local server but not to the Atlas. This really beginning to drive me crazy.
Any help is greatly appreciated...
**UPDATE:
I just deployed my app to heroku and you know what? It connects!! I could not get it to connect using my computer though. So probably it has to do something with my location or my connection, probably the location.
Related
I seem to have issues when trying to create a mongoose connection. I am following a book published in 2014 so my immediate response was to check the mongoose docs but they agree that the book gives the correct format. Below is my connection:
var dbURI = 'mongodb://localhost/Loc8r';
mongoose.connect(dbURI);
As soon as I add these lines, I get the following error:
Mongoose connection error: mongodb://127.0.0.1/Loc8r
(node:743) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): MongoNetworkError: failed to connect to server [127.0.0.1:27017] on first connect [MongoNetworkError: connect ECONNREFUSED 127.0.0.1:27017]
(node:743) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
If I remove the connection, I have no errors...but that would defeat the purpose of trying to connect to a DB. I also tried substituting localhost in the URI for 127.0.0.1 which is known to solve some issues but I had no luck there either. I am running the localhost on a simple $nodemon command via terminal and nothing else.
Useful info:
MongoDB v3.6.3
Mongoose v5.0.10
Express v4.15.5
Node v8.9.4
Help would be appreciated.
Thanks.
try this way
var MongoClient = require('mongodb').MongoClient
, assert = require('assert');
// Connection URL
var url = 'mongodb://localhost:27017/myproject';
// Use connect method to connect to the server
MongoClient.connect(url, function(err, db) {
assert.equal(null, err);
console.log("Connected successfully to server");
db.close();
});
You are going on the right path but you forgot to put the port on which MongoDB runs,
MongoDB runs on the port 27017
Do not forget to start MongoDB server, If you are on mac open terminal and enter mongod and it will start your MongoDB server then run your code it will work fine.
var dbURI = 'mongodb://localhost:27017/Loc8r';
mongoose.connect(dbURI);
mongoose.connection.on("connected", () => {
console.log("Connected to database");
});
mongoose.connection.on("error", (err) => {
console.log("Database error:" + err);
});
I apologise for this as I was able to find the solution myself but I guess this may help others some day.
The fault lay with the fact that I only installed MongoDB via Homebrew and I stopped as soon as MongoDB was literally "installed" and considered MongoDB to be "installed". I went back to look at how MongoDB should properly be installed and I noticed that I did not make the directory /data/db and give it its permissions which was an important step.
Once I did this, I ran mongod globally, and nodemon on a separate terminal, locally at the root of the app and it worked completely fine and got a successful message in the console. Every time I tried to connect, it was searching for /data/db which it obviously could not find as I had not made it. But I would not have came to this conclusion if Nikhil had not mentioned running mongod.
To summarise, ensure you follow all installing steps in future.
I'm pretty new to Mongo and Node. I set up a test account on mongolabs and created a new admin user. Then in my localhost I required mongoose and used.
mongoose.connect('mongodb://admin:password#ds045475.mongolab.com:45475/nodelearn', function(err){
if (err) console.log(err);
});
however, it keeps throwing the error: [MongoError, connect ECONNREFUSED] name: 'MongoError', message: 'connect ECONN REFUSED'. I have the mongolab address right, and I have mongoose imported. I'm not sure what the problem is.
I have done some googling but haven't found anything..
My setup is like this:
OS X, boot2docker, everything local except mongolabs database.
The project is working fine when it's not inside docker.
I am trying to run my nodejs project inside a docker image. I have done this before, but not with a database connection requirement. The problem is that my node app crashes on startup with the information:
/src/node_modules/mongoose/node_modules/mongodb/lib/server.js:228
process.nextTick(function() { throw err; })
^
Error: getaddrinfo ESRCH
at errnoException (dns.js:37:11)
at Object.onanswer [as oncomplete] (dns.js:124:16)
Does anyone have any idea how to solve this? Is there a DNS flag inside docker that can be set or is anything blocking my connection to the outside?
EDIT:
I connect to my mongodb on mongolabs through mongoose.
var configDB = require('./config/database.js');
mongoose.connect(configDB.url);
and my passport.js file looks like this:
module.exports = {
'url' : 'mongodb://<user>:<password>#ds045027.mongolab.com:45027/database
};
I'm trying to connect to a mongodb from my web application. However, I get an auth failed error from mongo when I specify the database I want to connect to. If I do not specify the db, then to connection is successful.
I have checked the spelling and if the database exits with the mongo command line show dbs
var dbURI = 'mongodb://root:pwd#localhost:27017/dbname';
mongoose.connect(dbURI, function(err) {
if (err) throw err;
});
C:\Users\David\Documents\Bitbucket\productWebsite\node_modules\mongoose\node_modules\mongodb\lib\mongodb\connection\base.js:245
throw message;
^
MongoError: auth failed
at Object.toError (C:\Users\David\Documents\Bitbucket\productWebsite\node_modules\mongoose\node_modules\mongodb\lib\mongodb\utils.js:114:11)
at C:\Users\David\Documents\Bitbucket\productWebsite\node_modules\mongoose\node_modules\mongodb\lib\mongodb\db.js:1130:31
at C:\Users\David\Documents\Bitbucket\productWebsite\node_modules\mongoose\node_modules\mongodb\lib\mongodb\db.js:1847:9
at Server.Base._callHandler (C:\Users\David\Documents\Bitbucket\productWebsite\node_modules\mongoose\node_modules\mongodb\lib\mongodb\connection\base.js:445:41)
at C:\Users\David\Documents\Bitbucket\productWebsite\node_modules\mongoose\node_modules\mongodb\lib\mongodb\connection\server.js:478:18
at MongoReply.parseBody (C:\Users\David\Documents\Bitbucket\productWebsite\node_modules\mongoose\node_modules\mongodb\lib\mongodb\responses\mongo_reply.js:68:5)
at null.<anonymous> (C:\Users\David\Documents\Bitbucket\productWebsite\node_modules\mongoose\node_modules\mongodb\lib\mongodb\connection\server.js:436:20)
at emit (events.js:95:17)
at null.<anonymous> (C:\Users\David\Documents\Bitbucket\productWebsite\node_modules\mongoose\node_modules\mongodb\lib\mongodb\connection\connection_pool.js:201:13)
at emit (events.js:98:17)
I'm using Bitnami Mean stack for Windows
Can someone tell me what I am forgetting?
It matters which database you try to authenticate to. Authenticate to the database where the user was created. You can switch to using other databases once authenticated.
You might want to do something like this...
var opt = {
user: config.username,
pass: config.password,
auth: {
authdb: 'admin'
}
};
var connection = mongoose.createConnection(config.database.host, 'mydatabase', config.database.port, opt);
'authdb' option is the database you created the user under.
In my experience, I found that the reason might be the version difference between the mongoose and mongoDB. In my package.json the mongoose version is the 3.8.5 and my mongoDB version is 3.0.4, I changed the mongoose version 3.8.5 to 4.1.5 and ran the command:
npm update
and ran the app, that worked for me.
I am trying to connect to postgres from my node project. So far this is my code
var pg = require('pg');
var connectionString = 'postgress://username:mypssword#localhost:5432/dbname';
var client = new pg.Client(connectionString);
client.connect(function(err) {
if (err) {
console.log(err);
}
});
I get this error:
{
[Error: connect ECONNREFUSED]
code: 'ECONNREFUSED',
errno: 'ECONNREFUSED',
syscall: 'connect'
}
I really need help on this
it should be postgres:// not postgess:
also you could use an object instead of the string as documented here: pg.Client
Error: connect ECONNREFUSED means that you're trying to connect to something that won't allow it (and thus is refusing the connection). Make sure your connectionString is correct. The one issue I can see from here is that it starts with:
postgress://
instead of
postgres://
(You have an extra s).
I was also facing the same issue for a local Postgres connection. Here your application is not able to establish a connection with Postgres database. Try this solution for Windows OS, replace string "localhost" with "host.docker.internal".
So your new URL will be
postgres://DbUser:DbPass#host.docker.internal:5432/DbName