字典项的 ElasticSearch/NEST 索引策略 [英] ElasticSearch/NEST indexing policy for Dictionary items

问题描述

我有一个包含字段的文档模型，它是一个字典，可以取任何值，如下所示:

I have a document model containing field which is a dictionary and can take any value, like this:

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

    public string Description { get; set; }

    public Dictionary<string, object> Permissions { get; set; }

    public Dictionary<string, object> Metadata { get; set; }
}

例如

client.IndexDocument(new Document
{
    Id = "4",
    Description = "ordinary document",
    Metadata = new Dictionary<string, object>
    {
        { "publish_date", new DateTime(1930, 10, 11) },
        { "author_country", "RU" },
        { "salary", 2590.00 },
        { "likes", 23 },
    }
})

映射是自动完成的，因此默认分析器会更改字典的值，例如:将字符串更改为小写或删除破折号，以便此代码不会返回任何结果:

Mapping is done automatically so default analizers change values of dictionary, e.g.: change strings to lowercase or remove dashes so this code won't return any results:

var result = client.Search<Document>(s => s
    .Query(q =>
        q.Term(new Field("metadata.author_country"), "RU"))
    );

如何为元数据的任何值禁用此行为?或者-设置自定义分析器?或者-仅对给定类型的值禁用它?

How can i disable this behaviour for any value of Metadata? Or- set custom analizer? Or- disable it only for values of given type?

推荐答案

您应该将文档字段的映射设置为正确的类型.在此处查看更多信息:https://www.elastic.co/guide/en/elasticsearch/reference/7.10/mapping.html所有类型都在这里列出:https://www.elastic.co/guide/en/elasticsearch/reference/7.10/mapping-types.html

You should set the mapping of the document fields to the correct kind. See more info here: https://www.elastic.co/guide/en/elasticsearch/reference/7.10/mapping.html And all the types are listed here: https://www.elastic.co/guide/en/elasticsearch/reference/7.10/mapping-types.html

要在 Nest 中执行此操作，您需要将正确的属性添加到文档定义中.

To do it in Nest you need to add the correct attribute to your document definition.

在此处查看详细信息:https://www.elastic.co/guide/en/elasticsearch/client/net-api/current/attribute-mapping.html

如果我了解您要执行的操作，那么您需要将元数据类型设置为嵌套，因为您要搜索元数据:

If I understand what you are trying to do then you will need to set the Metadata type as nested because you want to search the Metadata:

https://www.elastic.co/guide/en/elasticsearch/reference/current/nested.html

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