elasticsearch - 同义词分析器未给出结果

Question

我定义了以下定制分析器:

{
  "analysis": {
    "analyzer": {
      "products-alike": {
        "filter": [
          "lowercase",
          "product-db"
        ],
        "tokenizer": "standard"
      }
    },
    "filter": {
      "product-db": {
        "type": "synonym",
        "synonyms": [
          "Xiaomi,Mi,Mi3,Mi4,Redmi",
          "OnePlus,OnePlusOne,OnePlus1,OnePlus2"
        ]
      }
    }
  }
}

现在，我已将此映射到必填字段并完成了查询。但是只有完全匹配的结果，例如，如果我查询 Xiaomi，就会有结果，但是 Mi或 Mi3不会给我任何帮助。为什么会发生这种情况，任何人都可以帮助使其正常工作吗？

Answer 1

您只需要用小写而不是CamelCase来编写所有同义词，就像这样:

{
  "analysis": {
    "analyzer": {
      "products-alike": {
        "filter": [
          "lowercase",
          "product-db"
        ],
        "tokenizer": "standard"
      }
    },
    "filter": {
      "product-db": {
        "type": "synonym",
        "synonyms": [
          "xiaomi,mi,mi3,mi4,redmi",
          "oneplus,oneplusone,oneplus1,oneplus2"
        ]
      }
    }
  }
}

此后，它将起作用，即，如果您查询 Mi3，则将匹配所有同义词标记:

curl -XGET 'localhost:9200/your_index/_analyze?analyzer=products-alike&pretty' -d 'Mi3'

结果:

{
  "tokens" : [ {
    "token" : "xiaomi",
    "start_offset" : 0,
    "end_offset" : 3,
    "type" : "SYNONYM",
    "position" : 1
  }, {
    "token" : "mi",
    "start_offset" : 0,
    "end_offset" : 3,
    "type" : "SYNONYM",
    "position" : 1
  }, {
    "token" : "mi3",
    "start_offset" : 0,
    "end_offset" : 3,
    "type" : "SYNONYM",
    "position" : 1
  }, {
    "token" : "mi4",
    "start_offset" : 0,
    "end_offset" : 3,
    "type" : "SYNONYM",
    "position" : 1
  }, {
    "token" : "redmi",
    "start_offset" : 0,
    "end_offset" : 3,
    "type" : "SYNONYM",
    "position" : 1
  } ]
}