ElasticSearch Nest Msearch fn 没有带来所有结果答案

【问题标题】：ElasticSearch Nest Msearch fn does not bring all resultsElasticSearch Nest Msearch fn 没有带来所有结果
【发布时间】：2017-03-29 18:26:56
【问题描述】：

我的目标是使用multiple search在一个 ES 请求中发送 3 个单独的查询

我正在使用 NEST 客户端使用以下函数向 Elastic 搜索发送查询

IElasticClient _elasticClient.LowLevel.Msearch<string>(query).Body;

使用 curl 命令作为原始查询传递绝对没问题，但 NEST MSearch 只返回“event_results”和“venue_results”，但不返回“location_results”

curl -XPOST localhost:9200/_msearch -d '
{"index" : "search_results"}
{ "size": 0, "query": { "bool": { "must": [ { "term": { "partnersites": "16" } }, { "match_phrase_prefix": { "name": "manchester" } } ] } }, "aggs": { "event_results": { "terms": { "field": "name.keyword", "size": 1 }, "aggs": { "top_tag_hits": { "top_hits": { "size": 1, "_source": [ "name", "groupedName", "groupedDisplayName", "groupedUrl", "eventCode", "venueName", "venueTown", "venueId", "venueUrl", "media", "categories.name" ] } } } } } }
{"index" : "search_results2"}
{ "size": 0, "query": { "bool": { "must": [ { "term": { "partnersites": "16" } }, { "match_phrase_prefix": { "venueName": "Manchester" } } ] } }, "aggs": { "venue_results": { "terms": { "field": "name.keyword", "size": 1 }, "aggs": { "top_tag_hits": { "top_hits": { "size": 1, "_source": [ "name", "groupedName", "groupedDisplayName", "groupedUrl", "eventCode", "venueName", "venueTown", "venueId", "venueUrl", "media", "categories.name" ] } } } } } }
{"index" : "search_results3"}
{ "size": 0, "query": { "bool": { "must": [ { "term": { "partnersites": "16" } }, { "match_phrase_prefix": { "venueTown": "manchester" } } ] } }, "aggs": { "location_results": { "terms": { "field": "name.keyword", "size": 1 }, "aggs": { "top_tag_hits": { "top_hits": { "size": 1, "_source": [ "name", "groupedName", "groupedDisplayName", "groupedUrl", "eventCode", "venueName", "venueTown", "venueId", "venueUrl", "media", "categories.name" ] } } } } } }
'

有人知道问题出在哪里吗？

【问题讨论】：

标签： json elasticsearch nest elasticsearch-plugin

【解决方案1】：

只要有可能，您就不想使用“LowLevel”的东西。相反，请使用IElasticClient 上提供给您的内容。下面是一个示例，说明如何使用 IElasticClient.MultiSearch 以流畅的语法运行 3 次搜索（这是执行此操作的首选方式）。

var mSearchResponse = ElasticClient.MultiSearch(msearch => msearch
    .Search<RedemptionES>(
        s1 => s1.Query(
            q=>q.Term(
                t=> t.OnField(f=> f.Id).Value("123")
            )
        )
    )
    .Search<RedemptionES>(
        s2 => s2.Query(
            q => q.Term(
                t => t.OnField(f => f.Id).Value("456")
            )
        )
    )
    .Search<RedemptionES>(
        s3 => s3.Query(
            q => q.Term(
                t => t.OnField(f => f.Id).Value("789")
            )
        )
    )
);

【讨论】：

我的查询量很大，转换为 IELasticSearch 语法需要很长时间，而且 elasticsearch 团队倾向于更改语法，因此更难维护。是否有可能获得相同的结果，但使用原始查询？

【解决方案2】：

问题在于缩进。试试这个：

    public static string qu = @"{""index"" : ""search_results""}
{ ""size"": 0, ""query"": { ""bool"": { ""must"": [ { ""term"": { ""partnersites"": ""16"" } }, { ""match_phrase_prefix"": { ""name"": ""manchester"" } } ] } }, ""aggs"": { ""event_results"": { ""terms"": { ""field"": ""name.keyword"", ""size"": 1 }, ""aggs"": { ""top_tag_hits"": { ""top_hits"": { ""size"": 1, ""_source"": [ ""name"", ""groupedName"", ""groupedDisplayName"", ""groupedUrl"", ""eventCode"", ""venueName"", ""venueTown"", ""venueId"", ""venueUrl"", ""media"", ""categories.name"" ] } } } } } }
{""index"" : ""search_results2""}
{ ""size"": 0, ""query"": { ""bool"": { ""must"": [ { ""term"": { ""partnersites"": ""16"" } }, { ""match_phrase_prefix"": { ""venueName"": ""Manchester"" } } ] } }, ""aggs"": { ""venue_results"": { ""terms"": { ""field"": ""name.keyword"", ""size"": 1 }, ""aggs"": { ""top_tag_hits"": { ""top_hits"": { ""size"": 1, ""_source"": [ ""name"", ""groupedName"", ""groupedDisplayName"", ""groupedUrl"", ""eventCode"", ""venueName"", ""venueTown"", ""venueId"", ""venueUrl"", ""media"", ""categories.name"" ] } } } } } }
{""index"" : ""search_results3""}
{ ""size"": 0, ""query"": { ""bool"": { ""must"": [ { ""term"": { ""partnersites"": ""16"" } }, { ""match_phrase_prefix"": { ""venueTown"": ""manchester"" } } ] } }, ""aggs"": { ""location_results"": { ""terms"": { ""field"": ""name.keyword"", ""size"": 1 }, ""aggs"": { ""top_tag_hits"": { ""top_hits"": { ""size"": 1, ""_source"": [ ""name"", ""groupedName"", ""groupedDisplayName"", ""groupedUrl"", ""eventCode"", ""venueName"", ""venueTown"", ""venueId"", ""venueUrl"", ""media"", ""categories.name"" ] } } } } } }
";

var result = _elasticClient.LowLevel.Msearch<string>(qu).Body; // Query ES for results.

【讨论】：