在node js中使用class-validator验证数组对象

npm install class-validator class-transformer

import { IsString, IsEmail, IsArray, ValidateNested } from 'class-validator';
import { Type } from 'class-transformer';

class User {
  @IsString()
  name: string;

  @IsEmail()
  email: string;

  @IsArray()
  @ValidateNested({ each: true })
  @Type(() => Address)
  addresses: Address[];
}

class Address {
  @IsString()
  street: string;

  @IsString()
  city: string;
}

import { validate } from 'class-validator';

const user = new User();
user.name = 'John Doe';
user.email = 'john@example.com';
user.addresses = [
  { street: '123 Main St', city: 'New York' },
  { street: '456 Elm St', city: 'Los Angeles' },
];

validate(user).then(errors => {
  if (errors.length > 0) {
    console.log('Validation failed. Errors:', errors);
  } else {
    console.log('Validation succeeded');
  }
});