node-express로 REST API 만들기(1)

node express 로 rest api를 만들어 볼 것이다. db는 mongodb로 연결해주겠다.

1. 설치
2. mongo db 연결
3. port 열기
4. route 설정
5. DB Schema 설정
   6...

설치

• 프로젝트 폴더를 만든다.
  mkdir server

• node 초기화
  node init

• 라이브러리 설치
  yarn add express mongoose dotenv helmet morgan nodemon

• package.json에서 스크립트 수정

yarn start 할 때 실행할 스크립트 변경
<package.json>

{
	"scripts": {
      "start": "nodemon index.js"
    },
}

mongo db 연결

mongo db 생성

• mongo cloud에 sign up
  https://www.mongodb.com/cloud

• Create Organization

• Create a Project

• Build a Database
  free create Click
  Create Cluster Click
  Create User Click
  이러면 mongo db 생성은 완성이 된것이다.

mongo db connect

• Database Deployments
  Connect Click
  Choose a connection method Click
  Connect your application Click
  Add your connection string into your application code 밑에있는 링크 복사

• dotenv 사용하기
  <index.js>

const dotenv = require("dotenv");

dotenv.config();

아까 복사했던 링크 넣기
<.env>

MONGO_URL = mongodb+srv://<id>:<password>@cluster0.zhc0uyp.mongodb.net/?retryWrites=true&w=majority

• Mongo DB Connection
  <index.js>

const express = require("express");
const app = express();
const mongoose = require("mongoose");
const dotenv = require("dotenv");


dotenv.config();

mongoose.connect(
	process.env.MONGO_URL,
	{ useNewUrlParser: true, useUnifiedTopology: true },
	() => {
		console.log("Connected to MongoDB");
	}
);

port 열어주기

• 8800 port 열어주기
  <index.js>

const express = require("express");
const app = express();
const mongoose = require("mongoose");
const dotenv = require("dotenv");
const helmet = require("helmet");
const morgan = require("morgan");


dotenv.config();

mongoose.connect(
	process.env.MONGO_URL,
	{ useNewUrlParser: true, useUnifiedTopology: true },
	() => {
		console.log("Connected to MongoDB");
	}
);

// middleware
app.use(express.json());
app.use(helmet());
app.use(morgan("common"));

// 8800 port open
app.listen(8800, () => {
	console.log("Backend server is running!");
})

Route 설정

• ./server 위치에서 routes 폴더 생성
  mkdir routes

• auth.js 생성
  <auth.js>

const router = require("express").Router();

//test
router.get("/test", (req, res) => {
  res.send("auth get method");
  console.log("test auth get method");
  res.status(200).json("test auth successful");
});

//REGISTER
//LOGIN

module.exports = router

• 같은 방식으로 routes 폴더에 posts.js users.js 작성

• index.js에서 연결해주기
  <index.js>

const express = require("express");
const app = express();
const mongoose = require("mongoose");
const dotenv = require("dotenv");
const helmet = require("helmet");
const morgan = require("morgan");
const userRoute = require("./routes/users");
const authRoute = require("./routes/auth");
const postRoute = require("./routes/posts");

dotenv.config();

mongoose.connect(
	process.env.MONGO_URL,
	{ useNewUrlParser: true, useUnifiedTopology: true },
	() => {
		console.log("Connected to MongoDB");
	}
);

// middleware
app.use(express.json());
app.use(helmet());
app.use(morgan("common"));

// routing connect
app.use("/api/users", userRoute);
app.use("/api/auth", authRoute);
app.use("/api/posts", postRoute);

// 8800 port open
app.listen(8800, () => {
	console.log("Backend server is running!");
})

이렇게 짜고 node index.js를 실행하면
http://localhost:8800/api/users/test

http://localhost:8800/api/auth/test

http://localhost:8800/api/posts/test

이 곳으로 접속가능하며, test로 써둔 get method들이 실행될것이다.

DB Schema 설정

• db schema를 정해주기 위해 ./server 위치에서 models 폴더 생성
  mkdir models

• User.js
  <User.js>

const mongoose = require("mongoose");

const UserSchema = new mongoose.Schema(
  {
    username: {
      type: String,
      require: true,
      min: 3,
      max: 20,
      unique: true,
    },
    email: {
      type: String,
      required: true,
      max: 50,
      unique: true,
    },
    password: {
      type: String,
      required: true,
      min: 6,
    },
    profilePicture: {
      type: String,
      default: "",
    },
    coverPicture: {
      type: String,
      default: "",
    },
    followers: {
      type: Array,
      default: [],
    },
    followings: {
      type: Array,
      default: [],
    },
    isAdmin: {
      type: Boolean,
      default: false,
    },
	desc: {
		type:String,
		max:50,
	},
	city: {
		type:String,
		max:50,
	},
	from: {
		type:String,
		max:50,
	},
	relationship: {
		type:Number,
		enum:[1, 2, 3],
	},
  },
  { timestamps: true }
);

module.exports = mongoose.model("User", UserSchema);

• Post.js
  <Post.js>

const mongoose = require("mongoose");

const PostSchema = new mongoose.Schema(
  {
	userId:{
		type:String,
		required:true
	},
	desc:{
		type:String,
		max:500
	},
	img:{
		type:String
	},
	likes:{
		type:Array,
		defalut: [],
	},
  },
  { timestamps: true }
);

module.exports = mongoose.model("Post", PostSchema);

다음 포스트에 이어진다.