Thank you **acm** for helping me on this, I am still facing few issues as I am new to this I am not getting proper syntax to traverse through the code.
I have written code as follows:
#include <list>
#include <bsoncxx/builder/stream/document.hpp>
#include <bsoncxx/json.hpp>
#include <mongocxx/client.hpp>
#include <mongocxx/instance.hpp>
#include <cstdint>
#include <iostream>
#include <vector>
#include <bsoncxx/json.hpp>
#include <mongocxx/client.hpp>
#include <mongocxx/stdx.hpp>
#include <mongocxx/uri.hpp>
#include <bsoncxx/builder/basic/document.hpp>
#include <mongocxx/options/find.hpp>
#include <bsoncxx/stdx/string_view.hpp>
#include <mongocxx/database.hpp>
using bsoncxx::builder::stream::document;
using bsoncxx::builder::stream::finalize;
using bsoncxx::type;
using namespace bsoncxx;
int main(int, char**)
{
mongocxx::instance inst{};
mongocxx::client conn{mongocxx::uri{}};
auto collection = conn["test"]["restaurants"];
// bsoncxx::stdx::optional<bsoncxx::document::value> maybe_result =collectio n.find_one(document{} << finalize);
mongocxx::cursor cursor = collection.find({});
for (const bsoncxx::document::view& doc :cursor)
{
using std::begin;
using std::end;
auto num_keys = std::distance(begin(doc), end(doc));
std::vector<std::string> doc_keys;
std::transform(begin(doc), end(doc), std::back_inserter(doc_keys), [](document::element ele)
{
return ele.key().to_string();
});
std::cout << "document keys are: " << std::endl;
for (auto key : doc_keys) {
std::cout << key << " " << std::endl;
}
std::cout << std::endl;
}
}
Output:
document keys are:
_id
address
borough
cuisine
grades
name
restaurant_id
document keys are:
_id
address
borough
cuisine
grades
name
restaurant_id
Il retourne la sortie en nombre le nombre de documents présents dans la collection. Je ne suis pas capable de traverser en utilisant la fonction Find_one() comme mentionné dans la question principale. Y a-t-il un moyen par lequel je peux obtenir la valeur ci-dessus comme une seule fois? [Extract key attributes mongocxxExtrait attributs clés mongocxx en boucle sur document entier