[코로나맵2] mongoose 패키지 설치 및 설정

1. 작업 폴더로 가서

npm install mongoose 

 

 

 

2. bin 폴더 안의 www 파일에 들어간다 

 

3. /app 등을 불러오는 곳에 변수 하나 정의해준다 

const mongoose = require("mongoose");

 

 

const mongoose = require('mongoose');

let db = mongoose.connection;
db.on('error', console.error);
db.once("open", ()=> {
  console.log("Connected to MongoDB Server");
});

mongoose.connect()

여기까지 썼나?!

 

그런 다음 connect 함수에는 string 이 하나 들어가야 한다 

 

atlas site로 가서 

connect 버튼을 누르고 이번에는 compass 가 아니라 두번째 application 연결로 들어간다 

 

그러면 여기서 string이 있을 텐데 이걸 복사해서 본인 계정에 맞게 바꾸면 됨 

 

const mongoose = require('mongoose');

let db = mongoose.connection;
db.on('error', console.error);
db.once("open", ()=> {
  console.log("Connected to MongoDB Server");
});

mongoose.connect(`mongodb+srv://authuser:<password>@myfirstmap.2uz9q.mongodb.net/myFirstDatabase?retryWrites=true&w=majority`)

백틱안에 넣어야 함 

지금까지 작성한 코드 

 

 

 

근데 이걸 그냥 그대로 깃헙에 올리면 

보완상의 문제가 있을 수 있다 

따라서 패스워드를 따로 빼서 만들도록 하겠음 !!!!

 

 

root위치에 config folder를 만들고 그 안에 

userConfig.json 파일을 하나 만들어준다 

config/userConfig.json 인셈 

 

{
	"PW" : "asdkjf"
}

그 안에 중괄호 치고 모두 큰따옴표로 묶은 password를 적음 

 

 

 

그리고 나서 다시 bin/www로 돌아와 userconfig 파일을 가져온다 

 

const mongoose = require('mongoose');
const userConfig = require("../config/userConfig.json");

let db = mongoose.connection;
db.on('error', console.error);
db.once("open", ()=> {
  console.log("Connected to MongoDB Server");
});

mongoose.connect(`mongodb+srv://authuser:${userConfig.PW}@myfirstmap.2uz9q.mongodb.net/myFirstDatabase?retryWrites=true&w=majority`, 
{useNewUrlParser:true, useUnifiedTopology:true});

const userCOnfig ~ 으로 json을 가져왔고 

백틱 안에 변수 선언으로 패스워드를 입력한다 

그다음 보완을 위해 usenewurlparser, useunifiedtopology를 true설정 

 

 

 

혹시 아래와 같은 에러가 나왔다면 

nodemon] watching path(s): *.*

[nodemon] watching extensions: js,mjs,json

[nodemon] starting `node ./bin/www`

MongoServerError: bad auth : Authentication failed.

    at MessageStream.messageHandler (/Users/a/Documents/myfirstmap/mysecondmap/secondmap/node_modules/mongodb/lib/cmap/connection.js:467:30)

    at MessageStream.emit (events.js:375:28)

    at processIncomingData (/Users/a/Documents/myfirstmap/mysecondmap/secondmap/node_modules/mongodb/lib/cmap/message_stream.js:108:16)

    at MessageStream._write (/Users/a/Documents/myfirstmap/mysecondmap/secondmap/node_modules/mongodb/lib/cmap/message_stream.js:28:9)

    at writeOrBuffer (internal/streams/writable.js:358:12)

    at MessageStream.Writable.write (internal/streams/writable.js:303:10)

    at TLSSocket.ondata (internal/streams/readable.js:726:22)

    at TLSSocket.emit (events.js:375:28)

    at addChunk (internal/streams/readable.js:290:12)

    at readableAddChunk (internal/streams/readable.js:265:9) {

  ok: 0,

  code: 8000,

  codeName: 'AtlasError'

}

(node:3501) UnhandledPromiseRejectionWarning: MongoServerError: bad auth : Authentication failed.

    at MessageStream.messageHandler (/Users/a/Documents/myfirstmap/mysecondmap/secondmap/node_modules/mongodb/lib/cmap/connection.js:467:30)

    at MessageStream.emit (events.js:375:28)

    at processIncomingData (/Users/a/Documents/myfirstmap/mysecondmap/secondmap/node_modules/mongodb/lib/cmap/message_stream.js:108:16)

    at MessageStream._write (/Users/a/Documents/myfirstmap/mysecondmap/secondmap/node_modules/mongodb/lib/cmap/message_stream.js:28:9)

    at writeOrBuffer (internal/streams/writable.js:358:12)

    at MessageStream.Writable.write (internal/streams/writable.js:303:10)

    at TLSSocket.ondata (internal/streams/readable.js:726:22)

    at TLSSocket.emit (events.js:375:28)

    at addChunk (internal/streams/readable.js:290:12)

    at readableAddChunk (internal/streams/readable.js:265:9)

(Use `node --trace-warnings ...` to show where the warning was created)

(node:3501) 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:3501) [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.

이건 패스워드를 잘못 써서 그럼 

잘 확인해보소 

 

 

[nodemon] restarting due to changes...

[nodemon] starting `node ./bin/www`

Connected to MongoDB Server

이렇게 나오면 정상 :)