add user crud

src/app.module.ts

@@ -3,20 +3,21 @@ import { AppController } from './app.controller';
 import { AppService } from './app.service';
 import { TypeOrmModule } from '@nestjs/typeorm';
 import { ConfigModule, ConfigService } from '@nestjs/config';
-
+import { UserModule } from './user/user.module';
+import { User } from './entity/user';
 
 const moduleTypeOrm = TypeOrmModule.forRootAsync({
   imports: [ConfigModule],
   inject: [ConfigService],
   useFactory: (configService: ConfigService) => {
     return {
-      type:   'postgres',
+      type: 'postgres',
       host: configService.get<string>('DATABASE_HOST'),
       port: parseInt(configService.get<string>('DATABASE_PORT') as string,10),
       username: configService.get<string>('DATABASE_USER'),
       password: configService.get<string>('DATABASE_PASS'),
       database: configService.get<string>('DATABASE_NAME'),
-      entities: [],
+      entities: [User],
       // synchronize: true,
     };
   },
@@ -26,10 +27,10 @@ const moduleTypeOrm = TypeOrmModule.forRootAsync({
 @Module({
   imports: [
     ConfigModule.forRoot(),
-    moduleTypeOrm
+    moduleTypeOrm,
+    UserModule
   ],
   controllers: [AppController],
   providers: [AppService],
 })
-export class AppModule {
-}
+export class AppModule {}

src/user/dto/create-user.dto.ts

@@ -0,0 +1,14 @@
+import { IsString, IsEmail, MinLength } from 'class-validator';
+
+export class CreateUserDto {
+  @IsString()
+  @MinLength(3)
+  username: string;
+
+  @IsEmail()
+  email: string;
+
+  @IsString()
+  @MinLength(6)
+  password: string;
+}

src/user/dto/update-user.dto.ts

@@ -0,0 +1,17 @@
+import { IsString, IsEmail, MinLength, IsOptional } from 'class-validator';
+
+export class UpdateUserDto {
+  @IsOptional()
+  @IsString()
+  @MinLength(3)
+  username?: string;
+
+  @IsOptional()
+  @IsEmail()
+  email?: string;
+
+  @IsOptional()
+  @IsString()
+  @MinLength(6)
+  password?: string;
+}

src/user/user.controller.ts

@@ -0,0 +1,47 @@
+import {
+  Controller,
+  Get,
+  Post,
+  Body,
+  Patch,
+  Param,
+  Delete,
+  ValidationPipe,
+} from '@nestjs/common';
+import { UserService } from './user.service';
+import { CreateUserDto } from './dto/create-user.dto';
+import { UpdateUserDto } from './dto/update-user.dto';
+import { User } from '../entity/user';
+
+@Controller('users')
+export class UserController {
+  constructor(private readonly userService: UserService) {}
+
+  @Post()
+  create(@Body(new ValidationPipe()) createUserDto: CreateUserDto): Promise<User> {
+    return this.userService.create(createUserDto);
+  }
+
+  @Get()
+  findAll(): Promise<User[]> {
+    return this.userService.findAll();
+  }
+
+  @Get(':id')
+  findOne(@Param('id') id: string): Promise<User | null> {
+    return this.userService.findOne(+id);
+  }
+
+  @Patch(':id')
+  update(
+    @Param('id') id: string,
+    @Body(new ValidationPipe()) updateUserDto: UpdateUserDto,
+  ): Promise<User | null> {
+    return this.userService.update(+id, updateUserDto);
+  }
+
+  @Delete(':id')
+  remove(@Param('id') id: string): Promise<void> {
+    return this.userService.remove(+id);
+  }
+}

src/user/user.module.ts

@@ -0,0 +1,12 @@
+import { Module } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { UserService } from './user.service';
+import { UserController } from './user.controller';
+import { User } from '../entity/user';
+
+@Module({
+  imports: [TypeOrmModule.forFeature([User])],
+  providers: [UserService],
+  controllers: [UserController],
+})
+export class UserModule {}

src/user/user.service.ts

@@ -0,0 +1,34 @@
+import { Injectable } from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { Repository } from 'typeorm';
+import { User } from '../entity/user';
+
+@Injectable()
+export class UserService {
+  constructor(
+    @InjectRepository(User)
+    private usersRepository: Repository<User>,
+  ) {}
+
+  findAll(): Promise<User[]> {
+    return this.usersRepository.find();
+  }
+
+  findOne(id: number): Promise<User | null> {
+    return this.usersRepository.findOneBy({ id });
+  }
+
+  async create(user: Partial<User>): Promise<User> {
+    const newUser = this.usersRepository.create(user);
+    return this.usersRepository.save(newUser);
+  }
+
+  async update(id: number, user: Partial<User>): Promise<User | null> {
+    await this.usersRepository.update(id, user);
+    return this.usersRepository.findOneBy({ id });
+  }
+
+  async remove(id: number): Promise<void> {
+    await this.usersRepository.delete(id);
+  }
+}