Question

I want to add a new document to the following document having an outer key “User”

{
  name:himani,
  User:[
    {
      _id:e25ffgf627627,
      Name:User1
    },
    {
      _id:fri2i2jhjh9098,
      Name:User2
    }
  ]
};

Below is my code in which I am trying to add a new document to already existing document.
My code is:

var server = MongoServer.Create("mongodb://username:password@localhost:27017/?safe=true");
SafeMode mode = new SafeMode(true);
SafeModeResult result = new SafeModeResult();
var db = server.GetDatabase("himani");
var coll = db.GetCollection("test");
BsonDocument document = new BsonDocument();
document.Add("name", "himani");
result = coll.Insert(document, mode);

BsonDocument nested = new BsonDocument();
nested.Add("1", "heena").Add("2", "divya");
BsonArray a = new BsonArray();
a.Add(2);
a.Add(5);
nested.Add("values", a);
document["3"] = new BsonArray().Add(BsonValue.Create(nested));
coll.Save(document);
var query = Query.And(
    Query.EQ("name", "himani"),
    Query.EQ("3.1", "heena")
);
var match = coll.FindOne(query);

var update = Update.AddToSet("3", new BsonDocument {{ "count", "2" }});
coll.Update(query, update);

I want to add a new document to the User array. I am doing this by above code but its not working.Please tell me the right way of doing it.

Answer 1

I don’t understand your document structure at all… and the only “user” array I could find in here was a field called “3”. Your code does in fact work and appends a document into the “3” array. The below is the result after running your code. Perhaps you could be more clear as to what you want your document to look like after you have “appended” a user.

{
  "_id":ObjectId("4fa7d965ce48f3216c52c6c7"),
  "name":"himani",
  "3":[
    {
      "1":"heena",
      "2":"divya",
      "values":[ 2, 5 ]
    },
    {
      "count":"2"
    }
  ]
}