根据类型显示来自 mongo 的文档

Question

我在mongo中有这个：

    {
  "_id": {
    "$oid": "62bf6b5521d6c6a226d6b41b"
  },
  "title": "Myanmar",
  "description": "The Republic of the Union of Myanmar (or more commonly known as Myanmar) has an area of 676,578 square kilometres, making it the second largest country in Southeast Asia. It shares borders with Bangladesh, China, India, Laos, and Thailand. Naypyidaw is the capital of Myanmar, and Yangon, as the former capital, is the country’s most important commercial centre.",
  "whatToDo": "Head to the most famous place in Myanmar, Bagan, where you can rent out an e-bike (solo or with a group from your hostel) to explore over 2,000 temples and pagodas. You can also hop in some shared transport to visit the nearby Mount Popa, a monastery perched on top of an extinct volcano with 777 stairs to climb and maybe even more monkeys to get past. From Bagan you can head to Hsipaw or Kalaw that act as starting points for multi-day treks to see Myanmar’s countryside and rest your head in homestays along the way. Treks are also a great way to meet new travel friends. And if you’re craving a bit of reflective solo time? You can visit places like the enchanting Shwedagon Pagoda in Yangon or Mandalay’s U Bein Bridge where flocks of people congregate every sunrise and sunset. Both are magical places to explore solo, although you’re likely to get invited to join a local family for a snack at both.",
  "typeOfPackageHoliday": "indepedentTours"
},{
  "_id": {
    "$oid": "62bf6d0d21d6c6a226d6b41d"
  },
  "title": "Classical Spain",
  "description": "Experience Andalucía’s magical fusion of Spanish and Moorish cultures as you discover Seville’s vibrant streets and conquistador heritage, Granada’s wondrous Alhambra and the dazzling Mezquita mosque in Córdoba – and much more. Andalucía is simply one of the most beautiful corners of Europe yet for many it remains relatively undiscovered. It’s a land where the excesses of the modern era seem not to have taken root and where travellers are genuinely welcomed. The food is a delight, with the area noted for its seafood and its famous drink, the fortified wine from Jerez we call sherry. Try a glass of fino, a very dry yet refreshing sherry, while nibbling tapas, that great Spanish titbit invention. The people are charming – always ready to help, with a friendly attitude towards their fellow man and a love of life so typical of Mediterranean people. So, for an inspirational blend of timeless countryside, iconic monuments, romantic and vivacious cities, fragrant flowers and orange blossom, wonderful art and superb cuisine, all set in a region that welcomes visitors as honoured guests, welcome to Andalucía.",
  "typeOfPackageHoliday": "escortedTours"
}

您可以看到第一个文档上的typeOfPackageHoliday是indepedentTours ，第二个文档是escortedTours我在该集合中有很多文档，有些是indepedentTours ，有些是escortedTours

如何创建控制器，以便他返回我，例如带有escortedTours的文档？

我尝试了这样的事情，但它不断地让我两个都回来。

Repository ：

 @Aggregation(pipeline={"{$sample:{size:1}}"})
 AggregationResults<PackageHoliday> randomEscortedTours();

ServiceImpl ：

 @Override
public PackageHoliday getRandomEscortedTours(String typeOfPackageHoliday) {
    return packageHolidayRepository.randomEscortedTours().getMappedResults().stream().
            findFirst().orElse(null);
}

Controller

@RequestMapping("getEscortedPackageHoliday/{typeOfPackageHoliday}")
public PackageHoliday getPackageHolidayByType(@PathVariable String typeOfPackageHoliday) {
    return packageHolidayService.getRandomEscortedTours(typeOfPackageHoliday);
}

我的错误在哪里？ 有更好的方法吗？ 另外，我的目标不是只返回一个带有路径变量 escortedType escortedType的文档，我知道我在这里使用的是@RequestMapping("getEscortedPackageHoliday/{typeOfPackageHoliday}")

我试图以这种方式只返回一个文件

 @Aggregation(pipeline={"{$sample:{size:1}}"})