nodeJs - 无法连接到 MongoDB

Question

I'm working on a little blockChain prototype just to learn it myself and the later work on a bigger project. I've downloaded MongoDB and the "mongod" command Works when I type it in the CMD .

However when trying to start my project where the connection is taking place, I'm only getting the error back, that I can't connect to the Mongo DB.

Here's what I got so far:

//Connect to DB
mongoose.connect("mongodb://localhost:27017", (err) => {
    if(err) 
        return console.log("Cannot connect to DB");
    console.log("Database is Connected   ", err);
    connectionCallback();
});

In the MongoDB Compass, I haven't created anything yet. That's why I don't have any DB in the code snippet after the "mongodb://localhost:27017 . I've already tried it, while specifying a DB in the connection String.

Answer 1

Try changing the URI from mongodb://localhost:27017 to mongodb://127.0.0.1:27017 . This might work.

Answer 2

why don't you try mongodb library in nodejs to create a mongodb client

npm install mongodb

this will install it and to connect through the nodejs you can use the followig lines of code

const uri = "mongodb+srv://<username>:<password>@<your-cluster-url>/test?retryWrites=true&w=majority";

you can use this line to connect to the db and create a client

const client = new MongoClient(uri);

you can also refer here for more details: visit here