Nest JS Typescript DTO Helper

toUserDto.t

export const toUserDto = (data: UserEntity): UserDto => {  
    const { id, username, email } = data;
    let userDto: UserDto = { id, username, email,  };
    return userDto;
};

UserDto.ts

export class UserDto {  
    @IsNotEmpty()  id: string;
    @IsNotEmpty()  username: string;
    @IsNotEmpty()  @IsEmail()  email: string;
}

UserEntity.ts

@Entity('user')
export class UserEntity {  
    @PrimaryGeneratedColumn('uuid') id: string;  
    @Column({ 
        type: 'varchar', 
        nullable: false, 
        unique: true 
    }) 
    username: string;
    @Column({ 
        type: 'varchar', 
        nullable: false 
    }) 
    password: string;  @Column({ 
        type: 'varchar', 
        nullable: false 
    }) 
    
    email: string;
    @BeforeInsert()  async hashPassword() {
        this.password = await bcrypt.hash(this.password, 10);  
    }
}