我正在尝试使用 mongocxx 驱动程序填充 C++ 查询。
Javascript 中的查询类似于:
{unit_id: {$in: [ObjectId('58aee90fefb6f7d46d26de72'),
ObjectId('58aee90fefb6f7d46d26de73']
}
}
我在想下面的代码可以用来生成数组部分,但它不能编译。
#include <cstdint>
#include <iostream>
#include <vector>
#include <bsoncxx/json.hpp>
#include <bsoncxx/types.hpp>
#include <mongocxx/client.hpp>
#include <mongocxx/stdx.hpp>
#include <mongocxx/uri.hpp>
#include <mongocxx/instance.hpp>
using bsoncxx::builder::stream::close_array;
using bsoncxx::builder::stream::close_document;
using bsoncxx::builder::stream::document;
using bsoncxx::builder::stream::finalize;
using bsoncxx::builder::stream::open_array;
using bsoncxx::builder::stream::open_document;
mongocxx::instance instance {};
mongocxx::client client{mongocxx::uri{}};
mongocxx::database db = client["banff_development"];
mongocxx::collection coll = db["units"];
int main()
{
mongocxx::cursor cursor = coll.find
(document{} << "provider_id" << bsoncxx::oid("58aee90fefb6f7d46d26de4a")
<< finalize);
bsoncxx::builder::stream::document unit_filter_builder;
for (auto a: cursor)
{
unit_filter_builder << a["_id"].get_oid();
}
return 0;
}
在哪里可以找到使用 ObjectId 数组进行过滤的查询的工作示例。