弹性搜索和NEST：使用查找进行过滤 [英] Elasticsearch and NEST: Filtering with Lookups

问题描述

我使用的是Elasticsearch 1.7.x（和NEST 1.7.2），并尝试利用如下所示的查找过滤：术语过滤器查找。我可以手工制作JSON，以获得我想要的请求，并使用Sense执行它。工作伟大，真棒功能！不过，在NEST图书馆，我没有看到创建这样一个条款条款的方法。例如，从上面提到的链接，我可以执行以下操作：

I'm using Elasticsearch 1.7.x (and NEST 1.7.2) and trying to take advantage of filtering with lookups as documented here: Terms Filter Lookup. I'm able to craft the JSON by hand for the request I desire and execute it using Sense. Works great, awesome feature! However, in the NEST library, I don't see a way to create such a terms clause. For example, from the link referenced above, I can do something like:

"terms" : {
   "proteins" : {
      "index" : "microarrays",
      "type" : "experiment",
      "id" : "experiment1234",
      "path" : "upregulated_proteins"
   },
   "_cache_key" : "experiment_1234"
}

有没有办法使用NEST构建这个查询？如果没有，有没有办法在建立NEST查询时注入一些JSON？我不知道NEST 2.x +是否支持，但升级到ES 2.x是我们的长期计划，我想利用ES 1.7中已经提供的功能。

Is there a way to build this query using NEST? If not, is there a way I can inject some JSON into a NEST query as I'm building it? I don't know if NEST 2.x+ supports this but upgrading to ES 2.x is a longer term plan for us and I'd like to leverage functionality that is already available in ES 1.7.

推荐答案

真棒，我已经收到了 Greg Marzouka 弹性！他说：

Awesome, I've already received an answer from Greg Marzouka of Elastic! He says:

它被映射为1.x中的TermsLookup（）或TermsLookupFilter。查看单元测试的一些例子。

client.Search<Paper>(s => s
   .Query(q => q
      .Filtered(fq => qf
         .Filter(f => f
            .CacheKey("experiment_1234")
            .TermsLookup(t => t
               .Lookup<Protein>(p => p.UnregulatedProteins, "experiment1234", "microarrays", "experiment") 
            )
         )
      )
   ));

在2.x中，它与ES查询DSL更一致。

In 2.x it's a little more aligned with the ES query DSL.

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