fastify + mongo = why nothing is stored inside database? - mongodb

Question

I am building a fastify application with mongodb. I've created this package.json file with a script to run mongo.
{
"dependencies": {
"#fastify/mongodb": "5.0.0",
"fastify": "4.11.0"
},
"scripts": {
"start": "node server.js",
"start-mongo": "docker run -d --name my-mongo -p 27017:27017 mongo",
}
}
And with npm run start-mongo I run mongo exposing port 27017. Then, ... this is fastify part.
const fastify = require('fastify')({logger: true})
fastify.register(require('#fastify/mongodb'), {
forceClose: true,
url: 'mongodb://localhost:27017/library'
})
fastify.get('/books', async(request, reply) => {
const books = await fastify.mongo.db
.collection('books')
.find()
reply.send(books)
});
fastify.post('/books', async(request, reply) => {
const result = await fastify
.mongo.db
.collection('books')
.insertOne(request.body)
reply.send({
message: 'book added',
id: result.insertId
})
})
GET /books:
{"_events":{},"_eventsCount":0}
POST /books
curl -H 'Content-Type: application/json' -X POST http://localhost:3000/books -d '{"message":"prova"}'
returns
{"message":"book added"}
It is strange because response should contain also id. But it doesnt.
reply.send({
message: 'book added',
id: result.insertId
})
This means that
const result = await fastify
.mongo.db
.collection('books')
.insertOne(request.body)
doesnt store the book. Any error is displayed and GET always return:
{"_events":{},"_eventsCount":0}
What's wrong?
--
I've also created mongo with docker-compose:
version: '3.1'
services:
mongo:
image: mongo
restart: always
ports:
- 27017:27017
environment:
MONGO_INITDB_ROOT_USERNAME: root
MONGO_INITDB_ROOT_PASSWORD: example
but it returns:
{
statusCode: 500,
code: '13',
error: 'Internal Server Error',
message: 'command insert requires authentication'
}
{
statusCode: 500,
code: '13',
error: 'Internal Server Error',
message: 'command find requires authentication'
}
I updated code from
fastify.register(require('#fastify/mongodb'), {
forceClose: true,
url: 'mongodb://localhost:27017/library'
})
to
fastify.register(require('#fastify/mongodb'), {
forceClose: true,
url: 'mongodb://root:example#localhost:27017/library'
})
but returns:
(node:86146) UnhandledPromiseRejectionWarning: MongoServerError: Authentication failed.
at Connection.onMessage (/Users/simonegentili/Development/github.com/sensorario/youtube.poliglotta/node_modules/mongodb/lib/cmap/connection.js:227:30)
at MessageStream.<anonymous> (/Users/simonegentili/Development/github.com/sensorario/youtube.poliglotta/node_modules/mongodb/lib/cmap/connection.js:60:60)
at MessageStream.emit (events.js:375:28)
at processIncomingData (/Users/simonegentili/Development/github.com/sensorario/youtube.poliglotta/node_modules/mongodb/lib/cmap/message_stream.js:125:16)
at MessageStream._write (/Users/simonegentili/Development/github.com/sensorario/youtube.poliglotta/node_modules/mongodb/lib/cmap/message_stream.js:33:9)
at writeOrBuffer (internal/streams/writable.js:358:12)
at MessageStream.Writable.write (internal/streams/writable.js:303:10)
at Socket.ondata (internal/streams/readable.js:726:22)
at Socket.emit (events.js:375:28)
at addChunk (internal/streams/readable.js:290:12)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:86146) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:86146) [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.
Why "Authentication failed"?

Answer 1

You need to:
update fastify mongo to v6 that supports fastify v4
The GET returns a cursor so change it to fastify.mongo.db.collection('books').find().toArray()
To get back the inserted id you need to change from inserted to insertedId
to set the MongoDB password duplicated question or you need to set the database property - code below updated:
note the plugin configuration
note the usage fastify.mongo.db.collection
Quick and dirty copy-paste:
const fastify = require('fastify')({ logger: !true })
fastify.register(require('#fastify/mongodb'), {
forceClose: true,
url: 'mongodb://root:example#localhost:27017',
database: 'library'
})
fastify.get('/books', async (request, reply) => {
const books = await fastify.mongo.db.collection('books').find().toArray()
reply.send(books)
})
fastify.post('/books', async (request, reply) => {
const result = await fastify
.mongo.db
.collection('books')
.insertOne(request.body)
reply.send({
message: 'book added',
id: result.insertedId
})
})
async function start () {
const done = await fastify.inject({
method: 'POST',
url: '/books',
body: { asd: 'foo' }
})
console.log(done.json())
const res = await fastify.inject('/books')
console.log(res.json())
fastify.close()
}
start()