插入前如何对密码进行哈希处理？

问题描述

我正在将Nest.Js与TypeORM一起使用，并且我想先将哈希密码存储在数据库中。

I am using Nest.Js with TypeORM and I want to hash my password before persisting into the DB.

我尝试使用事件装饰器 @BeforeInsert （），但是它对我不起作用，但后来我发现它不起作用，因为我将DTO作为输入。

I tried using the event decorator @BeforeInsert() however it wasn't working for me but later I found that it was not working because I was taking an DTO as an input.

user.controller.ts

  @Post()
  async create(@Body() data: CreateUserDto, @Res() res) {

    // if user already exist
    const isUserExist = await this.service.findByEmail(data.email);
    if (isUserExist) {
      throw new BadRequestException('Email already exist');
    }

    // insert user
    this.service.create(data);

    // send response
    return res.status(201).json({
      statusCode: 201,
      message: 'User added Successfully',
    });
  }

user.service.ts

    create(data: CreateUserDto) {
        return this.userRepository.save(data)
    }

因此，我基本上是使用DTO来保存数据。这就是为什么它不起作用。

So, I was basically using an DTO to save the data. That's why it was not working.

但是我要做的是将DTO映射到用户对象。因此，这就是我的工作。

But what I want to do is map the DTO to user object. So, This is what I did.

  @Post()
  async create(@Body() data: CreateUserDto, @Res() res) {

    // Create User object
    const user = new User();

    // Map DTO to User object
    for (const [key, value] of Object.entries(data)) {
      user[key] = value;
    }

    // if user already exist
    const isUserExist = await this.service.findByEmail(user.email);
    if (isUserExist) {
      throw new BadRequestException('Email already exist');
    }

    // insert user
    this.service.create(user);

    // send response
    return res.status(201).json({
      statusCode: 201,
      message: 'User added Successfully',
    });
  }

create-user.dto.ts

import { IsEmail, IsNotEmpty, IsString } from 'class-validator';
import { ApiProperty } from '@nestjs/swagger';
export class CreateUserDto {
    @IsNotEmpty()
    @IsString()
    @ApiProperty()
    readonly firstName: string;
    @IsNotEmpty()
    @IsString()
    @ApiProperty()
    readonly lastName: string;
    @IsNotEmpty()
    @IsString()
    @IsEmail()
    @ApiProperty()
    readonly email: string;
    @IsNotEmpty()
    @IsString()
    @ApiProperty()
    readonly password: string;
}

有没有更好的方法？因为当前我必须在每种方法中编写代码才能对其进行映射。

Is there any better approach for this? Because currently I have to write the code in every method to map it.

推荐答案

我们可以轻松地映射通过使用'class-transformer'包

答案：

async create(@Body() data: CreateUserDto, @Res() res) {

const user = plainToClass(User, data)

}

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