Find parent document by path in RavenDB

gistfile1.cs

class Program {
    static void Main(string[] args) {
        using (var store = new EmbeddableDocumentStore { RunInMemory = true }) {
            store.Initialize();

            using (var session = store.OpenSession()) {
                session.Store(new Document { Path = "a" });
                session.Store(new Document { Path = "a/b" });
                session.Store(new Document { Path = "a/b/c" });
                session.Store(new Document { Path = "a/d" });
                session.Store(new Document { Path = "a/d/e" });
                session.Store(new Document { Path = "a/f" });
                session.SaveChanges();
            }

            const string path = "a/b/c/x/y";

            using (var session = store.OpenSession()) {

                var pathParts = path.Split('/');
                var query = session.Query<Document>();
                for (var i = 1; i <= pathParts.Length; ++i) {
                    var shortenedPath = String.Join("/", pathParts, startIndex : 0, count : i);
                    query = query.Search(doc => doc.Path, shortenedPath, boost : i, options : SearchOptions.Or);
                }

                var document = query.Take(1).FirstOrDefault();

                Console.WriteLine("Found document: " + document.Path);
            }

            Console.WriteLine("READY.");
            Console.ReadLine();
        }
    }
}

public class Document {
    public string Id { get; set; }
    public string Path { get; set; }
}