Question

我的ES映射包含adjustment，organization和country字段。我想为这些特定字段定义同义词，例如：

SA => Seasonally Adjusted # for adjustment
SA => Special Analysis # for organization
SA => Kingdom of Saudi Arabia # for country

（注意，这是一个人为的例子，而不是真实的数据）

我猜这会在索引和查询时发生吗？

如何指定同义词应该针对特定字段，以便搜索SA将返回Seasonally Adjusted，adjustment中包含Special Analysis的所有文档organization中的Kingdom of Saudi Arabia或country？

另外，我可以使用基于嵌套文档的嵌套字段来执行此操作。那么子文档{ type: country, value: SA }和{ type: organization, value: SA }以及{ type: adjustment, value: SA }可以正常工作吗？

（ES 2.4）

Answer 1

您可以使用自定义同义词过滤器

为所有字段创建自定义分析器

例如，

分析器：

        "country_text_analyzer": {
           "type": "custom",
           "tokenizer": "keyword",
           "filter": [
              "lowercase",
              "country_synonym"
           ]
        }

过滤：

         "country_synonym" : {
            "type" : "synonym",
            "synonyms_path": "synonyms/synonyms_countries.txt" //<-- this path is relative to ES_CONFIG location
         }

您可以为所有字段创建类似的分析器/过滤器，为您的用例提供所需的行为。

Answer 2

PUT test_index { "settings": { "index": { "analysis": { "analyzer": { "synonym_adjustment": { "tokenizer": "whitespace", "filter": ["lowercase","synonym_adjustment_filter"] }, "synonym_organization": { "tokenizer": "whitespace", "filter": ["lowercase","synonym_organization_filter"] }, "synonym_country": { "tokenizer": "whitespace", "filter": ["lowercase","synonym_country_filter"] } }, "filter": { "synonym_adjustment_filter": { "type": "synonym", "synonyms": ["SA => Seasonally Adjusted"] }, "synonym_organization_filter": { "type": "synonym", "synonyms": ["SA => Special Analysis"] }, "synonym_country_filter": { "type": "synonym", "synonyms": ["SA => Kingdom of Saudi Arabia"] } } } } }, "mappings": { "index_type_name": { "properties": { "adjustment": { "type": "text", "analyzer": "default", "search_analyzer": "synonym_adjustment" }, "organization": { "type": "text", "analyzer": "default", "search_analyzer": "synonym_organization" }, "country": { "type": "text", "analyzer": "default", "search_analyzer": "synonym_country" } } } } }

Elasticsearch同义词仅适用于某个字段

2 个答案: