init

.eslintrc.js

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+module.exports = {
+  parser: '@typescript-eslint/parser',
+  parserOptions: {
+    project: 'tsconfig.json',
+    sourceType: 'module',
+  },
+  plugins: ['@typescript-eslint/eslint-plugin'],
+  extends: [
+    'plugin:@typescript-eslint/recommended',
+    'plugin:prettier/recommended',
+  ],
+  root: true,
+  env: {
+    node: true,
+    jest: true,
+  },
+  ignorePatterns: ['.eslintrc.js'],
+  rules: {
+    '@typescript-eslint/interface-name-prefix': 'off',
+    '@typescript-eslint/explicit-function-return-type': 'off',
+    '@typescript-eslint/explicit-module-boundary-types': 'off',
+    '@typescript-eslint/no-explicit-any': 'off',
+  },
+};

.gitignore

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+# compiled output
+/dist
+/node_modules
+
+# Logs
+logs
+*.log
+npm-debug.log*
+pnpm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+
+# OS
+.DS_Store
+
+# Tests
+/coverage
+/.nyc_output
+
+# IDEs and editors
+/.idea
+.project
+.classpath
+.c9/
+*.launch
+.settings/
+*.sublime-workspace
+
+# IDE - VSCode
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json

.prettierrc

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+{
+  "singleQuote": true,
+  "trailingComma": "all"
+}

README.md

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+<p align="center">
+  <a href="http://nestjs.com/" target="blank"><img src="https://nestjs.com/img/logo_text.svg" width="320" alt="Nest Logo" /></a>
+</p>
+
+[circleci-image]: https://img.shields.io/circleci/build/github/nestjs/nest/master?token=abc123def456
+[circleci-url]: https://circleci.com/gh/nestjs/nest
+
+  <p align="center">A progressive <a href="http://nodejs.org" target="_blank">Node.js</a> framework for building efficient and scalable server-side applications.</p>
+    <p align="center">
+<a href="https://www.npmjs.com/~nestjscore" target="_blank"><img src="https://img.shields.io/npm/v/@nestjs/core.svg" alt="NPM Version" /></a>
+<a href="https://www.npmjs.com/~nestjscore" target="_blank"><img src="https://img.shields.io/npm/l/@nestjs/core.svg" alt="Package License" /></a>
+<a href="https://www.npmjs.com/~nestjscore" target="_blank"><img src="https://img.shields.io/npm/dm/@nestjs/common.svg" alt="NPM Downloads" /></a>
+<a href="https://circleci.com/gh/nestjs/nest" target="_blank"><img src="https://img.shields.io/circleci/build/github/nestjs/nest/master" alt="CircleCI" /></a>
+<a href="https://coveralls.io/github/nestjs/nest?branch=master" target="_blank"><img src="https://coveralls.io/repos/github/nestjs/nest/badge.svg?branch=master#9" alt="Coverage" /></a>
+<a href="https://discord.gg/G7Qnnhy" target="_blank"><img src="https://img.shields.io/badge/discord-online-brightgreen.svg" alt="Discord"/></a>
+<a href="https://opencollective.com/nest#backer" target="_blank"><img src="https://opencollective.com/nest/backers/badge.svg" alt="Backers on Open Collective" /></a>
+<a href="https://opencollective.com/nest#sponsor" target="_blank"><img src="https://opencollective.com/nest/sponsors/badge.svg" alt="Sponsors on Open Collective" /></a>
+  <a href="https://paypal.me/kamilmysliwiec" target="_blank"><img src="https://img.shields.io/badge/Donate-PayPal-ff3f59.svg"/></a>
+    <a href="https://opencollective.com/nest#sponsor"  target="_blank"><img src="https://img.shields.io/badge/Support%20us-Open%20Collective-41B883.svg" alt="Support us"></a>
+  <a href="https://twitter.com/nestframework" target="_blank"><img src="https://img.shields.io/twitter/follow/nestframework.svg?style=social&label=Follow"></a>
+</p>
+  <!--[![Backers on Open Collective](https://opencollective.com/nest/backers/badge.svg)](https://opencollective.com/nest#backer)
+  [![Sponsors on Open Collective](https://opencollective.com/nest/sponsors/badge.svg)](https://opencollective.com/nest#sponsor)-->
+
+## Description
+
+[Nest](https://github.com/nestjs/nest) framework TypeScript starter repository.
+
+## Installation
+
+```bash
+$ npm install
+```
+
+## Running the app
+
+```bash
+# development
+$ npm run start
+
+# watch mode
+$ npm run start:dev
+
+# production mode
+$ npm run start:prod
+```
+
+## Test
+
+```bash
+# unit tests
+$ npm run test
+
+# e2e tests
+$ npm run test:e2e
+
+# test coverage
+$ npm run test:cov
+```
+
+## Support
+
+Nest is an MIT-licensed open source project. It can grow thanks to the sponsors and support by the amazing backers. If you'd like to join them, please [read more here](https://docs.nestjs.com/support).
+
+## Stay in touch
+
+- Author - [Kamil Myśliwiec](https://kamilmysliwiec.com)
+- Website - [https://nestjs.com](https://nestjs.com/)
+- Twitter - [@nestframework](https://twitter.com/nestframework)
+
+## License
+
+Nest is [MIT licensed](LICENSE).

nest-cli.json

@@ -0,0 +1,5 @@
+{
+  "$schema": "https://json.schemastore.org/nest-cli",
+  "collection": "@nestjs/schematics",
+  "sourceRoot": "src"
+}

package.json

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+{
+  "name": "backend",
+  "version": "0.0.1",
+  "description": "",
+  "author": "",
+  "private": true,
+  "license": "UNLICENSED",
+  "scripts": {
+    "prebuild": "rimraf dist",
+    "build": "nest build",
+    "format": "prettier --write \"src/**/*.ts\" \"test/**/*.ts\"",
+    "start": "nest start",
+    "start:dev": "nest start --watch",
+    "start:debug": "nest start --debug --watch",
+    "start:prod": "node dist/main",
+    "lint": "eslint \"{src,apps,libs,test}/**/*.ts\" --fix",
+    "test": "jest",
+    "test:watch": "jest --watch",
+    "test:cov": "jest --coverage",
+    "test:debug": "node --inspect-brk -r tsconfig-paths/register -r ts-node/register node_modules/.bin/jest --runInBand",
+    "test:e2e": "jest --config ./test/jest-e2e.json"
+  },
+  "dependencies": {
+    "@nestjs/common": "^8.0.0",
+    "@nestjs/core": "^8.0.0",
+    "@nestjs/platform-express": "^8.0.0",
+    "@nestjs/typeorm": "^8.0.3",
+    "mysql2": "^2.3.3",
+    "reflect-metadata": "^0.1.13",
+    "rimraf": "^3.0.2",
+    "rxjs": "^7.2.0",
+    "typeorm": "^0.3.6"
+  },
+  "devDependencies": {
+    "@nestjs/cli": "^8.0.0",
+    "@nestjs/schematics": "^8.0.0",
+    "@nestjs/testing": "^8.0.0",
+    "@types/express": "^4.17.13",
+    "@types/jest": "27.4.1",
+    "@types/node": "^16.0.0",
+    "@types/supertest": "^2.0.11",
+    "@typescript-eslint/eslint-plugin": "^5.0.0",
+    "@typescript-eslint/parser": "^5.0.0",
+    "eslint": "^8.0.1",
+    "eslint-config-prettier": "^8.3.0",
+    "eslint-plugin-prettier": "^4.0.0",
+    "jest": "^27.2.5",
+    "prettier": "^2.3.2",
+    "source-map-support": "^0.5.20",
+    "supertest": "^6.1.3",
+    "ts-jest": "^27.0.3",
+    "ts-loader": "^9.2.3",
+    "ts-node": "^10.0.0",
+    "tsconfig-paths": "^3.10.1",
+    "typescript": "^4.3.5"
+  },
+  "jest": {
+    "moduleFileExtensions": [
+      "js",
+      "json",
+      "ts"
+    ],
+    "rootDir": "src",
+    "testRegex": ".*\\.spec\\.ts$",
+    "transform": {
+      "^.+\\.(t|j)s$": "ts-jest"
+    },
+    "collectCoverageFrom": [
+      "**/*.(t|j)s"
+    ],
+    "coverageDirectory": "../coverage",
+    "testEnvironment": "node"
+  }
+}

src/app.module.ts

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+import { Module } from '@nestjs/common';
+import { BoardModule } from './board/board.module';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { BoardEntity } from './board/entity/board.entity';
+import { ReplyEntity } from './board/entity/reply.entity';
+
+@Module({
+  imports: [
+    TypeOrmModule.forRoot({
+      type: 'mysql',
+      host: 'localhost',
+      port: 3306,
+      username: 'root',
+      password: 'root',
+      database: 'GINI',
+      entities: [BoardEntity, ReplyEntity],
+      synchronize: true,
+    }),
+    BoardModule,
+  ],
+})
+export class AppModule {}

src/board/board.controller.ts

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+import { Controller, Get, Post, Body, Param } from '@nestjs/common';
+import { BoardService } from './board.service';
+import { BoardEntity } from './entity/board.entity';
+import { ReplyEntity } from './entity/reply.entity';
+
+@Controller('board')
+export class BoardController {
+  constructor(private readonly boardService: BoardService) {}
+
+  @Get(':boardId')
+  async getBoard(@Param() boardId: string): Promise<BoardEntity> {
+    return await this.boardService.getBoard(boardId);
+  }
+
+  @Get()
+  async getAllBoards(): Promise<BoardEntity[]> {
+    return await this.boardService.getAllBoards();
+  }
+
+  @Post()
+  async saveBoard(@Body() board: BoardEntity): Promise<BoardEntity> {
+    return await this.boardService.saveBoard(board);
+  }
+
+  @Post('/reply')
+  async saveReply(
+    @Body() reply: ReplyEntity,
+    @Param() boardId: string,
+  ): Promise<BoardEntity> {
+    const board = await this.boardService.getBoard(boardId);
+    const savedReply = await this.boardService.saveReply(reply);
+    board.replys.push(savedReply);
+    return await this.boardService.saveBoard(board);
+  }
+}

src/board/board.module.ts

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+import { Module } from '@nestjs/common';
+import { BoardService } from './board.service';
+import { BoardController } from './board.controller';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { BoardEntity } from './entity/board.entity';
+import { ReplyEntity } from './entity/reply.entity';
+
+@Module({
+  imports: [TypeOrmModule.forFeature([BoardEntity, ReplyEntity])],
+  providers: [BoardService],
+  controllers: [BoardController],
+})
+export class BoardModule {}

src/board/board.service.ts

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+import { Injectable } from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { BoardEntity } from './entity/board.entity';
+import { BoardRepository } from './entity/board.repository';
+import { ReplyEntity } from './entity/reply.entity';
+import { ReplyRepository } from './entity/reply.repository';
+
+@Injectable()
+export class BoardService {
+  constructor(
+    @InjectRepository(BoardEntity) private boardRepository: BoardRepository,
+    @InjectRepository(ReplyEntity) private replyRepository: ReplyRepository,
+  ) {}
+
+  getBoard(boardId: string): Promise<BoardEntity> {
+    return this.boardRepository.findOneById(boardId);
+  }
+
+  getAllBoards(): Promise<BoardEntity[]> {
+    return this.boardRepository.find();
+  }
+
+  saveBoard(board: BoardEntity): Promise<BoardEntity> {
+    return this.boardRepository.save(board);
+  }
+
+  async saveReply(reply: ReplyEntity): Promise<ReplyEntity> {
+    return this.replyRepository.save(reply);
+  }
+}

src/board/entity/board.entity.ts

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+import {
+  Column,
+  Entity,
+  PrimaryGeneratedColumn,
+  CreateDateColumn,
+  UpdateDateColumn,
+  OneToMany,
+} from 'typeorm';
+import { ReplyEntity } from './reply.entity';
+
+@Entity()
+export class BoardEntity {
+  @PrimaryGeneratedColumn()
+  id: number;
+
+  @Column()
+  title: string;
+
+  @Column()
+  content: string;
+
+  @Column()
+  writer: string;
+
+  @CreateDateColumn({ name: 'create_date', comment: '생성일' })
+  createdDate: Date;
+
+  @UpdateDateColumn({ name: 'update_date', comment: '수정일' })
+  updatedDate: Date;
+
+  @OneToMany((type) => ReplyEntity, (reply) => reply.board, { nullable: true })
+  replys: ReplyEntity[];
+}

src/board/entity/board.repository.ts

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+import { EntityRepository, Repository } from 'typeorm';
+import { BoardEntity } from './board.entity';
+
+@EntityRepository(BoardEntity)
+export class BoardRepository extends Repository<BoardEntity> {}

src/board/entity/reply.entity.ts

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+import {
+  Column,
+  Entity,
+  PrimaryGeneratedColumn,
+  CreateDateColumn,
+  ManyToOne,
+  JoinColumn,
+} from 'typeorm';
+import { BoardEntity } from './board.entity';
+
+@Entity()
+export class ReplyEntity {
+  @PrimaryGeneratedColumn()
+  id: number;
+
+  @Column()
+  content: string;
+
+  @Column()
+  writer: string;
+
+  @CreateDateColumn({ name: 'create_date', comment: '생성일' })
+  createdDate: Date;
+
+  @ManyToOne((type) => BoardEntity, (board) => board.replys)
+  @JoinColumn({ name: 'board_id' })
+  board: BoardEntity;
+}