[MongoDB] MongoDB와 node DB 연결

connect 클릭

mongodb user 추가

choose a connection method 클릭

connect your application 클릭

connection string only 부분 복사

 

npm install mongoose --save

 

mongoose(몽고db를 편하게 쓸 수 있는 객체모델링툴) 설치 

그러면 index.js의 scripts에 "mongoose" : 가 추가됨

 

const mongoose = require('mongoose')
mongoose.connect('mongodb+srv://<user>:<password>@XXX.XXX.mongodb.net/?retryWrites=true&w=majority', {
	useNewUrlParser: true, useUnifiedTopology: true, useCreateIndex: true, useFindAndModify: false
    }).then(() => console.log('MongoDB Connected ...'))
    .catch(err => console.log(err))

 

index.js에 추가

<user>부분에 아까 user 추가했을 때 적은 user명 입력, <password>부분에 적은 비밀번호 입력

(node:22619) [MONGOOSE] DeprecationWarning: Mongoose: the `strictQuery` option will be switched back to `false` by default in Mongoose 7. Use `mongoose.set('strictQuery', false);` if you want to prepare for this change. Or use `mongoose.set('strictQuery', true);` to suppress this warning. (Use `node --trace-deprecation ...` to show where the warning was created)

 

다 적고 실행하면 이 에러가 뜨는데 mongoose.set('strictQuery', false) 나 mongoose.set('strictQuery', true)를 추가해도 계속 뜬다
=> 검색해보니까 mongoose.set('strictQuery', false); 이 줄을 mongoose.connect 윗 줄로 올려야 warning이 안 뜬다!

+) 하지만 다음 강의에서 연결해보려니까

 

MongoParseError: options usecreateindex, usefindandmodify are not supported
	at parseOptions (/Users/xxx/node_js/boiler_plate/node_modules/mongodb/lib/connection_string.js:283:15)
    at new MongoClient (/Users/xxx/node_js/boiler_plate/node_modules/mongodb/lib/mongo_client.js:46:63)
    at /Users/xxx/node_js/boiler_plate/node_modules/mongoose/lib/connection.js:802:16
    at new Promise (<anonymous>)
    at Connection.openUri (/Users/xxx/node_js/boiler_plate/node_modules/mongoose/lib/connection.js:799:19)
    at /Users/xxx/node_js/boiler_plate/node_modules/mongoose/lib/index.js:411:10
    at /Users/xxx/node_js/boiler_plate/node_modules/mongoose/lib/helpers/promiseOrCallback.js:41:5
    at new Promise (<anonymous>)
    at promiseOrCallback (/Users/xxx/node_js/boiler_plate/node_modules/mongoose/lib/helpers/promiseOrCallback.js:40:10)
    at Mongoose._promiseOrCallback (/Users/xxx/node_js/boiler_plate/node_modules/mongoose/lib/index.js:1285:10) {
  [Symbol(errorLabels)]: Set(0) {}

 

위의 오류가 뜨면서 연결이 안됐는데 몽고DB 6이상부터는 usecreateindex, usefindandmodify를 지원하지 않는다고 한다

그래서 두 개를 지워주니 연결 된다!