Elasticsearch term suggester 没有 return 完全匹配的结果

Question

当我用

请求建议者时

{
    "my-title-suggestions-1": {
       "text": "tücher                ",
       "term": {
            "field": "name",
       }
    },
    "my-title-suggestions-2": {
       "text": "tüchers                ",
       "term": {
           "field": "name"
       }
    }
}

它returns

{
    "_shards": {
    "total": 5,
    "successful": 5,
    "failed": 0
    },
    "my-title-suggestions-1": [
    {
        "text": "tücher",
        "offset": 0,
        "length": 6,
        "options": []
    }
    ],
    "my-title-suggestions-2": [
    {
        "text": "tüchers",
        "offset": 0,
        "length": 7,
        "options": [
            {
                "text": "tücher",
                "score": 0.8333333,
                "freq": 6
            }
        ]
    }
    ]
}

我想知道为什么它 return 与第一个建议者不完全匹配？第二个建议者显然有那个结果。

我可以添加其他选项来解决此问题吗？

编辑：最小映射就是这样...

{
"name" : {
        "analyzer" : "standard",
        "type" : "string"
    }
}

Answer 1

我认为你做不到，我不确定你为什么要 suggestions 中的完全匹配，毕竟它们是 "suggestions"。

通常它们用于检查拼写错误。它将为您提供相似的候选建议，并且对于您输入的单词属于 edit distance 个，共 2 个。

Answer 2

添加@ChintanShah25 所说的内容：根据https://www.elastic.co/guide/en/elasticsearch/reference/2.0/search-suggesters-term.html（参见suggest_mode），术语建议器默认情况下：

Only provide suggestions for suggest text terms that are not in the index.

Elasticsearch term suggester 没有 return 完全匹配的结果

Elasticsearch term suggester does not return results on exact match

elasticsearch

search-suggestion