finally NestJS configure practice

README.md

NestJS
  ├─src
  │  ├─users  
  │  │  ├─dtos
  │  │  │  └─create-user.dto.ts
  │  │  ├─entities
  │  │  │  └─users.entitiy.ts
  │  │  ├─users.module.ts  
  │  │  └─users.resolver.ts
  │  ├─app.module.ts
  │  └─main.ts
  ├─test
  │  └─...test files
  └─eslint,env,prettier etc config files

create-user.dto.ts

import { ArgsType, Field, Int } from '@nestjs/graphql';
import {
  IsBoolean,
  IsInt,
  IsOptional,
  IsString,
  Length,
} from 'class-validator';

// data transfet object(DTO)
@ArgsType()
export class CreateUserDto {
  @Field(() => Int)
  @IsInt()
  id: number;

  @Field(() => String)
  @IsString()
  @Length(2, 10)
  name: string;

  @Field(() => String)
  @IsString()
  email: string;

  @Field(() => String, { nullable: true })
  @IsOptional()
  @IsString()
  gender?: 'male' | 'female';

  @Field(() => String)
  @IsString()
  address: string;

  @Field(() => Boolean)
  @IsBoolean()
  isVIP: boolean;
}

users.entity.ts

import { Field, Int, ObjectType } from '@nestjs/graphql';

@ObjectType()
export class User {
  @Field(() => Int)
  id: number;

  @Field(() => String)
  name: string;

  @Field(() => String)
  email: string;

  @Field(() => String, { nullable: true })
  gender?: 'male' | 'female';

  @Field(() => String)
  address: string;

  @Field(() => Boolean)
  isVIP: boolean;
}

users.resolver.ts

import { Args, Mutation, Query, Resolver } from '@nestjs/graphql';
import { CreateUserDto } from './dtos/create-user.dto';
import { User } from './entities/users.entity';

@Resolver(() => User)
export class UserResolver {
  @Query(() => Boolean)
  users(@Args('bool') bool: boolean): boolean {
    return bool;
  }

  @Mutation(() => Boolean)
  createUser(@Args() createUserDto: CreateUserDto): boolean {
    console.log(createUserDto);
    return true;
  }
}