About QueryContainerDescriptor function

[Suki_Yua]

Hi

I have a search document as below

{
  "total": 1,
  "results": [
    {
      "id": 1346282,
      "studentname": "Casey",
      "studentnumber" :"YT2021"
      "favourbooks": [
        {
             "id": 1,
             "bookname":"Three Little Pig",
             "AuthorName":"Steven Kellogg"
        },
        {
             "id": 2,
             "bookname":"Winnie The Pooh",
             "AuthorName":"A. A. Milne"
        }
      ]
    }
}

and I define student number filtering as below code is work

var filters = new List<Func<QueryContainerDescriptor<StudentDocument>, QueryContainer>>();
filters.Add(fq => fq.Terms(t => t.Field(f => f.studentnumber).Terms(request.studentnumber)));

But I don't know how to filterthe favourbooks which favourbooks is sub list of student
can anyone advise ?

Thank you