NEST and parent/child relation

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1

Hi!
I try to use parent/child relation following by this document.

I have the same classes for test: MyDocument, MyParent, MyChild.
Index creation:

            var createIndexResponse = ElasticClient.CreateIndex("a_test_index", c => c
            .Mappings(ms => ms
                .Map<MyDocument>(m => m
                    .RoutingField(r => r.Required()) 
                    .Properties<MyParent>(p => p
                        .Scalar(x => x.Id)
                        .Text(t => t.Name(x => x.ParentProperty))
                    )
                    .Properties<MyChild>(p => p
                        .Scalar(x => x.Id)
                        .Text(x => x.Name(n => n.ChildProperty))
                    )
                    .Properties(props => props
                        .Join(j => j 
                            .Name(p => p.MyJoinField)
                            .Relations(r => r
                                .Join<MyParent, MyChild>()
                            )
                        )
                    )
                )
            )
        );

Indexing data:

            var parent1 = new MyParent
        {
            Id = 1,
            ParentProperty = "Parrent1",
            MyJoinField = JoinField.Root<MyParent>()
        };
        var parent2 = new MyParent
        {
            Id = 2,
            ParentProperty = "Parrent2",
            MyJoinField = JoinField.Root<MyParent>()
        };
        ElasticClient.Index<MyDocument>(parent1, x => x.Index("a_test_index").Refresh(Refresh.True));
        ElasticClient.Index<MyDocument>(parent2, x => x.Index("a_test_index").Refresh(Refresh.True));

            var child1 = new MyChild
        {
            Id = 1,
            ChildProperty = "Child1",
            MyJoinField = JoinField.Link<MyChild>(1)
        };
        var child2 = new MyChild
        {
            Id = 2,
            ChildProperty = "Child2",
            MyJoinField = JoinField.Link<MyChild>(1)
        };
        var child3 = new MyChild
        {
            Id = 3,
            ChildProperty = "Child3",
            MyJoinField = JoinField.Link<MyChild>(2)
        };

        ElasticClient.Index<MyDocument>(child1, x => x.Index("a_test_index").Refresh(Refresh.True));
        ElasticClient.Index<MyDocument>(child2, x => x.Index("a_test_index").Refresh(Refresh.True));
        ElasticClient.Index<MyDocument>(child3, x => x.Index("a_test_index").Refresh(Refresh.True));

  1. Why indexed only last parent document?

  2. How make bulk indexing? When I try like this nothing happens (but I use such indexing without parent/child relations and it works):

         protected void IndexData<T>(IReadOnlyCollection<T> data, int partSize = 0) where T: class 
 {
     Exception exception = null;

     var waitHandle = new ManualResetEvent(false);

     var bulkObserver = new BulkAllObserver(
         onError: e =>
         {
             exception = e;
             waitHandle.Set();
             throw e;
         },
         onCompleted: () => waitHandle.Set(),
         onNext: b => { }
     );

     IBulkAllRequest<T> Selector(BulkAllDescriptor<T> x)
     {
         var result = x.Index("a_test_index").MaxDegreeOfParallelism(4).RefreshOnCompleted();
         if (partSize != 0)
         {
             result = result.Size(partSize);
         }

         return result;
     }

     var cancellationTokenSource = new CancellationTokenSource();
     var bulkAll = ElasticClient.BulkAll(data, Selector, cancellationTokenSource.Token);
     bulkAll.Subscribe(bulkObserver);

     waitHandle.WaitOne();

     if (exception != null)
     {
         throw exception;
     }
 }
2

Question 2 is solved:

        var list = new List<MyChild> {child1, child2, child3};
        IndexData<MyDocument>(list);

But first question is still opened: indexed only last MyParent document((
If I indexing only parent documents (without childs), then all two docs are indexed. But If with childs, then only last one

3

The Ids of the Child documents (1,2,3) repeat the Ids of the Parent documents (1,2). Sounds like you might be overwriting Parent with Id 2 with Child with Id 2? The Ids for all Parent and Child documents must be unique.

4

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