我想知道mongocxx驱动程序(c++)中的以下代码等效吗?
db.RadarPointsExl.find(
{ age: { $gt: 25, $lte: 50 },
{name:1 }
)
最佳答案
我的同事找到了答案,您可以使用以下代码使用:
using bsoncxx::builder::stream::document;
mongocxx::options::find opts;
document condition, options;
mongocxx::instance instance{};
mongocxx::client client{ mongocxx::uri{} };
mongocxx::database db = client["RadarDB"];
mongocxx::collection collection = db["RadarPointsExl"];
condition << "age" << open_document << "$gt" << 25 << "$lte" << 50 << close_document;
options << "name" << 1;
opts.projection(options.view());
mongocxx::cursor cursor = collection.find(condition.view(), opts);
for (auto doc : cursor) {
std::cout << doc["name"].get_utf8().value << "\n";
}
我希望它是有用的。