如何在 C++ 框架中集成 NoSQL 数据库？

#include <mongocxx/client.hpp>
#include <mongocxx/database.hpp>
#include <mongocxx/collection.hpp>
#include <bsoncxx/builder/stream/document.hpp>
#include <bsoncxx/json.hpp>

using namespace mongocxx;

int main() {
  // 创建数据库连接
  client client{uri("mongodb://localhost:27017")};

  // 获取数据库
  database db = client["test_db"];

  // 创建集合
  collection coll = db["test_coll"];

  // 插入文档
  bsoncxx::builder::stream::document doc_builder{};
  bsoncxx::document::value doc_value = doc_builder
    << "name" << "John Doe"
    << "age" << 30
    << bsoncxx::builder::stream::finalize;
  coll.insert_one(doc_value);

  // 查询文档
  bsoncxx::builder::stream::document query_builder{};
  bsoncxx::document::value query_value = query_builder
    << "name" << "John Doe"
    << bsoncxx::builder::stream::finalize;
  auto cursor = coll.find(query_value);

  // 遍历查询结果
  for (auto&& doc : cursor) {
    std::cout << bsoncxx::to_json(doc) << std::endl;
  }

  return 0;
}