[BE] 회원가입 API 구현

BE/package.json

@@ -28,6 +28,7 @@
     "@nestjs/typeorm": "^10.0.2",
     "axios": "^1.7.7",
     "bcrypt": "^5.1.1",
+    "class-transformer": "^0.5.1",
     "cross-env": "^7.0.3",
     "docker": "^1.0.0",
     "dotenv": "^16.4.5",
@@ -47,6 +48,7 @@
     "@types/jest": "^29.5.2",
     "@types/node": "^20.3.1",
     "@types/supertest": "^6.0.0",
+    "class-validator": "^0.14.1",
     "eslint": "^8.0.0",
     "eslint-config-airbnb-base": "^15.0.0",
     "eslint-config-airbnb-typescript": "^18.0.0",

BE/src/auth/auth.controller.ts

@@ -1,4 +1,4 @@
-import { Controller, Post, Body } from '@nestjs/common';
+import { Controller, Post, Body, ValidationPipe } from '@nestjs/common';
 import { AuthService } from './auth.service';
 import { AuthCredentialsDto } from './dto/authCredentials.dto';
 
@@ -7,7 +7,7 @@ export class AuthController {
   constructor(private authService: AuthService) {}
 
   @Post('/signup')
-  signUp(@Body() authCredentialsDto: AuthCredentialsDto) {
+  signUp(@Body(ValidationPipe) authCredentialsDto: AuthCredentialsDto) {
     return this.authService.signUp(authCredentialsDto);
   }
 }

BE/src/auth/dto/authCredentials.dto.ts

@@ -1,4 +1,13 @@
+import { IsString, Matches, MaxLength, MinLength } from 'class-validator';
 export class AuthCredentialsDto {
+  @IsString()
+  @MinLength(4)
+  @MaxLength(20)
   email: string;
+
+  @IsString()
+  @MinLength(4)
+  @MaxLength(20)
+  @Matches(/^[a-zA-Z0-9]*$/)
   password: string;
 }