Issue starting application

[lukebelliveau]

Issue Cannot start application due to mongoDB error on start

Expected behavior Application starts with command node index.js

Actual behavior Application has a mongoDB connection error when starting application

Steps to reproduce

$ git clone https://github.com/Beacon24/v0.git $ cd v0 $ npm install $ node index.js

See the following error in the console:

BEACON LIT ON PORT 3000
connection error: MongoNetworkError: failed to connect to server [localhost:27017] on first connect [Error: connect ECONNREFUSED 127.0.0.1:27017
    at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1142:16) {
  name: 'MongoNetworkError',
  errorLabels: [Array],
  [Symbol(mongoErrorContextSymbol)]: {}
}]
    at Pool.<anonymous> (/Users/lukebelliveau/ROBOT/v0/node_modules/mongodb-core/lib/topologies/server.js:564:11)
    at Pool.emit (node:events:394:28)
    at Connection.<anonymous> (/Users/lukebelliveau/ROBOT/v0/node_modules/mongodb-core/lib/connection/pool.js:317:12)
    at Object.onceWrapper (node:events:514:26)
    at Connection.emit (node:events:394:28)
    at Socket.<anonymous> (/Users/lukebelliveau/ROBOT/v0/node_modules/mongodb-core/lib/connection/connection.js:246:50)
    at Object.onceWrapper (node:events:514:26)
    at Socket.emit (node:events:394:28)
    at emitErrorNT (node:internal/streams/destroy:157:8)
    at emitErrorCloseNT (node:internal/streams/destroy:122:3)
    at processTicksAndRejections (node:internal/process/task_queues:83:21) {
  errorLabels: [ 'TransientTransactionError' ],
  [Symbol(mongoErrorContextSymbol)]: {}
}

Notes It seems like your index.js script expects a mongoDB server to be running at localhost:27017. Please edit your README.md file with instructions on how to start up your database. Hit me up with any questions.

[Beacon24]

Aha, yeah, that makes sense. I'll work on this today. I forget, do you have experience with mongo and mongoose?

[Beacon24]

I'm a little hazy on how all of the following parts fit together, so bear with me. I think you need to have either mongosh or mongod running in the background for index.js to connect to the DB with the following lines (31-34) mongoose.connect('mongodb://localhost:27017/beacon', { useNewUrlParser: true, useCreateIndex: true }); Could that be it? Are you currently running the mongo shell? If not, I believe you can start it up with mongosh and then maybe the app will connect properly? Let me know if I'm on the right track. Thanks for your help!!

[lukebelliveau]

Got it!

You were correct - the MongoDB server was not running. I think in most cases running mongod with MongoDB installed should do it.

I had some maybe Mac-specific issues that were resolved by doing this: https://stackoverflow.com/a/58297378/3124493

I'd suggest an addition to the README - include a link for instructions to install/run MongoDB, indicating that the MongoDB server must be running to run Beacon.

[Beacon24]

Excellent, thanks! And thanks for the links, I made your suggested changes to the README. Also discovered I can use VSCodes source control tab to easily push/pull changes to GitHub.