Elasticsearch NEST - Filtering on multilevel nested types

Question

I have a document model like this:

\"customer\": {  
    \"properties\": {  
        \"id\": { \"type\": \"integer\" },
        \"name\": { \"type\": \"string\         


        

Answer 1

Assuming we are modelling the customer to something on these lines

class customer
    {
        public int id { get; set; }
        public string name { get; set;}

        public class Orders {
            public int id { get; set;}
            public string orderData { get; set;}
            public class OrderLines
            {
                public int seqno { get; set; }
                public int quantity { get; set; }
                public int articleId { get; set; }
            }
            [ElasticProperty(Type = FieldType.Nested)]
            public List<OrderLines> orderLines { get; set; }
        }
         [ElasticProperty(Type = FieldType.Nested)]
        public List<Orders> orders { get; set; }

    };

The query in the above case would be :

 var response = client.Search<customer>(
                s => s.Index(<index_name_here>).Type("customer")
                .Query(q => q.Term(p=>p.id, 1) 
                &&
                q.Nested(n =>
                    n.Path("orders")
                    .Query(q2=> q2.Nested(
                        n2 => n2.Path("orders.orderLines")
                        .Query(q3 => 
                            q3.Term(c=>c.orders.First().orderLines.First().articleId, <article_id_here>)))))
               ));

As far as documentation the best I have come across is the same as the one you posted in the question and the resources linked there.