MongoDB + C# driver + query array of elements where each array element contains sub-document to query on

Question

I\'m using version 1.5.0.4566 of the official MongoDB C# driver. I\'m using Mongo version 2.06.

Here is what my document structure looks like (omitted fields not n

Answer 1

Try this instead

Query.ElemMatch("Children", Query.And(Query.EQ("StatusId",1), Query.EQ("Active",true),Query.LT("SubChild.ExpiresOn",DateTime.UtcNow)));

Wondering why this query magically works? It's the case (StatusId vs StatusID). JavaScript is case sensitive.

You could eliminate this problem by using strongly typed Linq queries, like:

from x in collection.AsQueryable()
where x.Children.Any(child => 
    child.StatusId == 1 
    && child.Active 
    && child.SubChild.ExpiresOn < DateTime.UtcNow)
select x