Web12 aug. 2024 · Query all documents with filter. We can query all documents in a collection in one go . Using this technique we can print all documents matching a specific filter. Fo this also we use the find () method and provide the range of values in field-value pair in our document in collection . And then we print all documents using to_json method. Web31 jan. 2024 · mongocxx :: collection coll = db [ "testcoll" ]; // 插入 try { for (int i =1; i <=10; ++ i) { auto builder = bsoncxx :: builder :: stream :: document {}; builder << "userid" << i << "name" << "username"; auto result = coll.insert_one (builder.view ()); bsoncxx :: oid oid = result- > inserted_id (). get _oid (). value;

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Web// The mongocxx::instance constructor and destructor initialize and shut down the driver, // respectively. Therefore, a mongocxx::instance must be created before using the driver and // must remain alive for as long as the driver is in use. mongocxx::instance inst {}; mongocxx::client conn {mongocxx::uri {}}; auto coll = conn [ "test" ] [ "coll" ]; Web30 mrt. 2024 · To filter for documents with the field “str” in the nested objects using mongocxx, the filter could be constructed as follows: mongocxx::cursor cursor = coll.find (document {} << "obj1.obj2.str" << "thirteen" << finalize); Make sure that the names and structure of the fields match the document structure in the database. 3d吊灯材质

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Webmongo-cxx-driver/examples/mongocxx/tutorial.cpp. Go to file. Cannot retrieve contributors at this time. 167 lines (144 sloc) 6.09 KB. Raw Blame. // Compile with: c++ --std=c++11 … http://mongocxx.org/api/mongocxx-v3/classmongocxx_1_1result_1_1insert__one.html http://mongocxx.org/api/current/classes.html 3d吊顶制作