是否有可能从普通弹性搜索转移到官方 .net 客户端，NEST

Question

我目前使用 PlainElastic 作为我的 .NET ElasticSearch 客户端。我正在考虑迁移到官方 .NET 客户端 NEST 有问题吗？

NEST 支持 SSL 吗？
我们可以做常见的查询吗？
常见的聚合怎么做？搬家需要很长时间吗

Answer 1

1.NEST 支持 SSL/TLS。只需在 ConnectionSettings

中指定您的 url

var pool = new SingleNodeConnectionPool(new Uri("https://localhost:9200"));
var connectionSettings = new ConnectionSettings(pool);

var client = new ElasticClient(connectionSettings);

2.NEST 支持 Elasticsearch 公开的所有 API，包括整个查询 DSL。一个例子

client.Search<Conference>(s => s
    .Query(q => q
        .Bool(b => b
            .Should(sh => sh
                .Match(m => m
                    .Field(f => f.Location)
                      .Query("Sydney")
                ), sh => sh
                .Match(m => m
                      .Field(f => f.Location)
                      .Query("Spektrum")
                      .Boost(2)
                )
            )
            .Filter(fi => fi
                .Term(t => t
                    .Field(f => f.Name.Suffix("raw"))
                    .Value("NDC")
                )
            )
        )
    )
);

NEST 具有 inference and operator overloading 等功能，可使构建查询变得更加容易。这是上一个带有运算符重载的查询

client.Search<Conference>(s => s
    .Query(q => (q
        .Match(m => m
            .Field(f => f.Location)
              .Query("Sydney")
        ) || q
        .Match(m => m
              .Field(f => f.Location)
              .Query("Spektrum")
              .Boost(2)
        )) && +q
        .Term(t => t
            .Field(f => f.Name.Suffix("raw"))
            .Value("NDC")
        )
    )
);

3.NEST 支持 all 聚合。这是一个针对 Whosebug 数据集的查询的相当复杂的示例，查看标记为 "dnx" 或“.net-core”并自 2015 年 6 月 29 日创建的问题。

在这些问题上，对问题编号进行了 terms aggregation is performed on the tags field, but only looking at the "dnx" and ".net-core" tags. On each term bucket, a date histogram aggregation is performed to bucket questions into 1 week intervals, with a count performed on the number of questions in each bucket and a Holt-Winters moving average aggregation。

var response = client.Search<Question>(s => s
    .Size(0)
    .Query(q => +q
        .Terms(m => m
            .Field(f => f.Tags)
            .Terms("dnx", ".net-core")
        ) && +q
        .DateRange(r => r
            .Field(f => f.CreationDate)
            .GreaterThan(new DateTime(2015, 06, 29))
        )
    )
    .Aggregations(a => a
        .Terms("tags", t => t
            .Field(f => f.Tags)
            .Include(@"dnx|\.net\-core")
            .Aggregations(sub => sub
                .DateHistogram("weekly_questions", dh => dh
                    .Field(f => f.CreationDate)
                    .Interval("1w")
                    .Aggregations(sa => sa
                        .ValueCount("count_questions", vc => vc
                            .Field(f => f.Id)
                        )
                        .MovingAverage("questions", ma => ma
                            .BucketsPath("count_questions.value")    
                            .Window(12)
                            .Model(mo => mo
                                .HoltWinters(hw => hw
                                    .Type(HoltWintersType.Additive)                                     
                                )
                            )
                        )
                    )
                )
            )
        )
    )
);

是否有可能从普通弹性搜索转移到官方 .net 客户端，NEST

Is it possible to move from plain elastic search to official .net client, NEST

.net

elasticsearch

nest