Nestjs validator array of object

model.dto.js

import { IsString, IsNumber, IsArray, ValidateNested, ArrayMinSize, ArrayMaxSize } from 'class-validator';
import { Type } from 'class-transformer';

export class SMa1 {
  @IsNumber()
  id: number;

  @IsString()
  type: string;

  @IsString()
  value: string;
}

export class SMa1DTO {
  @IsArray()
  @ValidateNested({ each: true })
  @ArrayMinSize(2)
  @ArrayMaxSize(2)
  @Type(() => SMa1)
  MSMa1: SMa1[];
}