public void Inferrence()
{
// hide
var client = TestClient.GetInMemoryClient(c => c.DisableDirectStreaming().PrettyJson());
var infer = client.Infer;
var parent = new MyParent {
Id = 1337, MyJoinField = JoinField.Root <MyParent>()
};
infer.Routing(parent).Should().Be("1337");
var child = new MyChild {
Id = 1338, MyJoinField = JoinField.Link <MyChild>(parentId: "1337")
};
infer.Routing(child).Should().Be("1337");
child = new MyChild {
Id = 1339, MyJoinField = JoinField.Link <MyChild, MyParent>(parent)
};
infer.Routing(child).Should().Be("1337");
/**
* here we index `parent` and rather than fishing out the parent id by inspecting `parent` we just pass the instance
* to `Routing` which can infer the correct routing key based on the JoinField property on the instance
*/
var indexResponse = client.Index(parent, i => i.Routing(Routing.From(parent)));
indexResponse.ApiCall.Uri.Query.Should().Contain("routing=1337");
/**
* The same goes for when we index a child, we can pass the instance directly to `Routing` and NEST will use the parent id
* already specified on `child`. Here we use the static import `using static Nest.Infer` and it's `Route()` static method to
* create an instance of `Routing`
*/
indexResponse = client.Index(child, i => i.Routing(Route(child)));
indexResponse.ApiCall.Uri.Query.Should().Contain("routing=1337");
/** Wouldn't be handy if NEST does this automatically? It does! */
indexResponse = client.IndexDocument(child);
indexResponse.ApiCall.Uri.Query.Should().Contain("routing=1337");
/** You can always override the default inferred routing though */
indexResponse = client.Index(child, i => i.Routing("explicit"));
indexResponse.ApiCall.Uri.Query.Should().Contain("routing=explicit");
indexResponse = client.Index(child, i => i.Routing(null));
indexResponse.ApiCall.Uri.Query.Should().NotContain("routing");
/**
* This works for both the fluent and object initializer syntax
*/
var indexRequest = new IndexRequest <MyChild>(child);
indexResponse = client.Index(indexRequest);
indexResponse.ApiCall.Uri.Query.Should().Contain("routing=1337");
/**
* Its important to note that the routing is resolved at request time, not instantation time
* here we update the `child`'s `JoinField` after already creating the index request for `child`
*/
child.MyJoinField = JoinField.Link <MyChild>(parentId: "something-else");
indexResponse = client.Index(indexRequest);
indexResponse.ApiCall.Uri.Query.Should().Contain("routing=something-else");
}