es 分词后能控制分词的权重值吗? - V2EX
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annielong
V2EX    Elasticsearch

es 分词后能控制分词的权重值吗?

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  •   annielong 2020-12-07 16:50:13 +08:00 3469 次点击
    这是一个创建于 1768 天前的主题,其中的信息可能已经有所发展或是发生改变。
    如查询“办理会员卡”,会分成“办理”、“会员卡”两个分词进行查询,“办理”可能会查询到“办理退货”,有没有什么方法可以优先查询“会员卡”这个分词。目前想到的方案是程序加关键字,先根据查询内容在 es 里面分词,然后拿分词在程序中进行关键字匹配,然后拿关键字去查询。
    3 条回复    2020-12-08 07:42:28 +08:00
    TimePPT
        1
    TimePPT  
    PRO
       2020-12-07 16:57:44 +08:00   1
    zsl199512101234
        2
    zsl199512101234  
       2020-12-07 17:11:52 +08:00   1
    用不着的感觉,排序的时候词间距和连续性设置下加权就可以把办理... 会员卡...这种排到前面去了
    wukangave
        3
    wukangave  
       2020-12-08 07:42:28 +08:00   1
    可以给文档加关键字和权重,查询的时候给文档打高分。比如建立索引的时候加如下 fields:
    "keywords": {"type": "nested", "properties":{"keywords": "keyword", "weight": "long"}}
    查询的时候用 function score query 给文档打分:
    "function_score": {"functions": [{"field": "keywords.weight"}], "query":{"match": {"keywords.keywords": "会员卡"}}}
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