fin in BSON documents with MongoDB C++ driver

Question

I have the following document in my MongoDB test database:

    db.a.find()
   {[ {
        "_id" : ObjectId("5113d680732fb764c44qweq"),
        "Builds" : [
                {
                    "level" : 1,
                    "rank" : 2
                },
                {
                    "level" : 3,
                    "rank" : 4
                }
              ]
}, {
 "_id" : ObjectId("5113d680732fb764c4464fdf"),
        "Builds" : [
                {
                    "level" : 3,
                    "rank" : 5
                },
                {
                    "level" : 3,
                    "rank" : 4
                }
              ]
    }
]}

I need find level which => 1 and <= 2 May you help me? It is possible do with mongocxx?

Does this answer your question? [find in BSON documents with MongoDB C++ driver](https://stackoverflow.com/questions/40998609/find-in-bson-documents-with-mongodb-c-driver) — Jason Aller, Aug 31 '20 at 02:14

score 1 · Accepted Answer · answered Dec 06 '16 at 12:30

1

mongocxx::cursor cursor = collection.find(
  document{} << "Builds.level" << open_document <<
    "$gte" << 1 <<
    "$lte" << 2
  << close_document << finalize);

for(auto doc : cursor) {
  std::cout << bsoncxx::to_json(doc) << "\n";
}

The mongo raw query which would fetch is the following :

db.a.find({"Builds.level":{$gte:1}, "Builds.level":{$lte:2}})

answered Dec 06 '16 at 12:30

satish chennupati

2,602
1
18
27

Can you say how can I put few conditions ? Like this and second "Builds.rank" >=3; – YaroslvaV Dec 06 '16 at 13:51
You mean you want multiple if else block kind of thing. if i understand correct. – satish chennupati Dec 06 '16 at 14:18
its like if("Builds.level" >= 1 && "Builds.level" <=2 && "Builds.rank" >=4) .... – YaroslvaV Dec 06 '16 at 14:22
Multiple, where I may put few condotions – YaroslvaV Dec 06 '16 at 14:55
[link]https://stackoverflow.com/questions/40998609/find-in-bson-documents-with-mongodb-c-driver new topic – YaroslvaV Dec 06 '16 at 15:46
we can use $or to acheive this. will try to work out in a while and post answer in the new question you asked – satish chennupati Dec 06 '16 at 17:06

score 1 · Answer 2 · answered Dec 06 '16 at 12:42

1

Think of you are finding data that greater then 1 and less then from 2 then you are go with mongodb then it's look like following:

db.getCollection('a').find({$and: [{'Builds.level': {$gte: 1}},{'Builds.level': {$lte: 2}}]})

answered Dec 06 '16 at 12:42

Ankur Rupapara

138
8

fin in BSON documents with MongoDB C++ driver

2 Answers2