FieldLookup should include "routing" property

[seanwm]

Describe the feature:

As documented here:

https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-terms-query.html

the Terms Query lookup supports a "routing" option, necessary when referencing a document in an index that uses custom routing. I need to use this, but NEST doesn't currently support that routing option with the FieldLookup class. Any chance we could see that added?

[seanwm]

Workaround for anyone else running into this:

public class RoutableFieldLookup : IFieldLookup
{
    public Id Id { get; set; }
    public IndexName Index { get; set; }
    public Field Path { get; set; }
    public TypeName Type { get; set; }
    [JsonProperty("routing")]
    public string CustomRouting { get; set; }
}

That plain ol' string property isn't going to do anything to make sure your routing value makes any sense, so caveat coder.

[Mpdreamz]

Thanks @seanwm we'll add it to our next releases 👍

Side note: I'm super happy you were able to hack what you needed through implementing our interface with your own class. This is exactly why we made such a push for interface everywhere! 😄

[seanwm]

Thanks. And yeah, I was really pleasantly surprised that I could just drop in my simple replacement class, kudos!