Nodejs中的类验证器

import { validate, IsEmail, IsNotEmpty } from 'class-validator';

class User {
  @IsNotEmpty()
  name: string;

  @IsEmail()
  email: string;
}

async function createUser(user: User) {
  const errors = await validate(user);
  if (errors.length > 0) {
    console.error('Validation failed:', errors);
    throw new Error('Invalid user data');
  }
  // 继续处理用户创建逻辑
}

const newUser = { name: '', email: 'invalid-email' };
createUser(newUser).catch(console.error);

async function createUser(user: User) {
  const errors = await validate(user);
  if (errors.length > 0) {
    errors.forEach(error => {
      console.error(`Property: ${error.propertyName}, Error: ${error.toString()}`);
    });
    throw new Error('Invalid user data');
  }
  // 继续处理用户创建逻辑
}

import { validate, IsNotEmpty, ValidateNested, Type } from 'class-validator';
import { plainToClass } from 'class-transformer';

class Address {
  @IsNotEmpty()
  street: string;
}

class User {
  @IsNotEmpty()
  name: string;

  @ValidateNested()
  @Type(() => Address)
  address: Address;
}

async function createUser(user: any) {
  const userClass = plainToClass(User, user);
  const errors = await validate(userClass);
  if (errors.length > 0) {
    console.error('Validation failed:', errors);
    throw new Error('Invalid user data');
  }
  // 继续处理用户创建逻辑
}

const newUser = { name: '', address: { street: '' } };
createUser(newUser).catch(console.error);