Nest/ElasticSearch 按 _uid 排序

Question

我正在尝试根据查询提取记录并使用 _uid 字段对它们进行排序。在我的例子中，_uid 是 Type 后跟 # 后跟我设置的 id。我的索引中充满了代码文件，_uid 的示例是 myType#MyDocuments/File.txt

所以我正在对 _uid 升序进行排序。它主要工作，它按顺序对类型进行排序，但在类型中它只对最上面的目录进行正确排序。

所以我会看到类似

的内容

Accounting/AP_ABC.asp
Accounting/AR_ABC.asp
Accounting/Account.asp

这是不对的，因为帐户应该在 AP 和 AR 之前。

有没有办法确保这会正确排序？

编辑从我的索引

添加映射

"dotnet":{"properties":{"fileContents":{"type":"string"},"filePath":{"type":"string"},"lastUpdate":{"type":"date","format":"dateOptionalTime"},"type":{"type":"string"}}}

Answer 1

创建一个新的 not_analyzed 字段，如 sortid，它将保存您的 ID 的未分析值 (Accounting/Account.asp)。 This文章会详细解释你为什么要这样做。

更新:

尝试申请case-insensitive sorting。稍后我会用一个工作示例更新我的答案。

更新2

实现您正在尝试做的事情的最简单方法是创建具有以下映射的索引：

client.CreateIndex(descriptor => descriptor
    .Index(indexName)
    .AddMapping<Document>(m => m
        .Properties(p => p
            .String(s => s.Name(n => n.Id).Index(FieldIndexOption.NotAnalyzed)))));

class Document
{
    public string Id { get; set; }
}

索引一些具有小写 ID 值的文档：

client.Index(new Document {Id = "Accounting/AP_ABC.asp".ToLower()});
client.Index(new Document {Id = "Accounting/AR_ABC.asp".ToLower()});
client.Index(new Document {Id = "Accounting/Account.asp".ToLower()});

那么这个排序

var searchResponse = client.Search<Document>(s => s
    .Sort(sort => sort
        .OnField(f => f.Id).Ascending()));

我们会得到

{
   "took": 1,
   "timed_out": false,
   "_shards": {
      "total": 5,
      "successful": 5,
      "failed": 0
   },
   "hits": {
      "total": 3,
      "max_score": null,
      "hits": [
         {
            "_index": "indexname",
            "_type": "document",
            "_id": "accounting/account.asp",
            "_score": null,
            "_source": {
               "id": "accounting/account.asp"
            },
            "sort": [
               "accounting/account.asp"
            ]
         },
         {
            "_index": "indexname",
            "_type": "document",
            "_id": "accounting/ap_abc.asp",
            "_score": null,
            "_source": {
               "id": "accounting/ap_abc.asp"
            },
            "sort": [
               "accounting/ap_abc.asp"
            ]
         },
         {
            "_index": "indexname",
            "_type": "document",
            "_id": "accounting/ar_abc.asp",
            "_score": null,
            "_source": {
               "id": "accounting/ar_abc.asp"
            },
            "sort": [
               "accounting/ar_abc.asp"
            ]
         }
      ]
   }
}

但是如果你真的关心你提供的 ID（例如 Accounting/AP_ABC.asp)可以用前面提到的 Case-Insensitive Sorting.

要将此解决方案应用于 NEST：

如下创建映射

client.CreateIndex(descriptor => descriptor
    .Index(indexName)
    .Analysis(analysisDescriptor => analysisDescriptor
        .Analyzers(a => a
            .Add("case_insensitive_sort", new CustomAnalyzer
            {
                Tokenizer = "keyword",
                Filter = new List<string> {"lowercase"}
            })))
    .AddMapping<Document>(m => m
        .Properties(p => p
            .String(s => s
                .Name(n => n.Id)
                .Analyzer("case_insensitive_sort")))));

索引文件：

client.Index(new Document {Id = "Accounting/AP_ABC.asp"});
client.Index(new Document {Id = "Accounting/AR_ABC.asp"});
client.Index(new Document {Id = "Accounting/Account.asp"});

对于排序，我们将进行排序，我们将得到以下结果

{
   "took": 1,
   "timed_out": false,
   "_shards": {
      "total": 5,
      "successful": 5,
      "failed": 0
   },
   "hits": {
      "total": 3,
      "max_score": null,
      "hits": [
         {
            "_index": "indexname",
            "_type": "document",
            "_id": "Accounting/Account.asp",
            "_score": null,
            "_source": {
               "id": "Accounting/Account.asp"
            },
            "sort": [
               "accounting/account.asp"
            ]
         },
         {
            "_index": "indexname",
            "_type": "document",
            "_id": "Accounting/AP_ABC.asp",
            "_score": null,
            "_source": {
               "id": "Accounting/AP_ABC.asp"
            },
            "sort": [
               "accounting/ap_abc.asp"
            ]
         },
         {
            "_index": "indexname",
            "_type": "document",
            "_id": "Accounting/AR_ABC.asp",
            "_score": null,
            "_source": {
               "id": "Accounting/AR_ABC.asp"
            },
            "sort": [
               "accounting/ar_abc.asp"
            ]
         }
      ]
   }
}

希望对您有所帮助。

Nest/ElasticSearch 按 _uid 排序

Nest/ElasticSearch Sorting by _uid

c#

sorting

elasticsearch

nest