聚合中的弹性同义词用法

时间:2017-10-09 07:33:57

标签: elasticsearch filter analyzer synonym

情况

使用的弹性版本:2.3.1

我有一个像这样配置的弹性索引

PUT /my_index
{
  "settings": {
    "analysis": {
      "filter": {
        "my_synonym_filter": {
          "type": "synonym", 
          "synonyms": [ 
            "british,english",
            "queen,monarch"
          ]
        }
      },
      "analyzer": {
        "my_synonyms": {
          "tokenizer": "standard",
          "filter": [
            "lowercase",
            "my_synonym_filter" 
          ]
        }
      }
    }
  }
}

当我查询文档并使用查询字词" english "时,这很棒。或" 女王"我得到的所有文件都与 british monarch 相匹配。当我在过滤器聚合中使用同义词时,它不起作用。例如

在我的索引中,我有5个文件,其中3个有君主,其中2个有女王

POST /my_index/_search
{
  "size": 0,
  "query" : {
      "match" : {
         "status.synonym":{
            "query": "queen",
            "operator": "and"
         }
      }
   },
     "aggs" : {
        "status_terms" : {
            "terms" : { "field" : "status.synonym" }
        },
        "monarch_filter" : {
            "filter" : { "term": { "status.synonym": "monarch" } }
        }
    },
   "explain" : 0
}

结果产生:

总点击次数:

  • 5 doc doc(正如所料,太棒了!)
  • 状态条款:为女王提供5个医生(按预期,很棒!)
  • Monarch过滤器:0 doc count

我尝试了不同的同义词过滤器配置:

  • 女王,君主
  • 女王,君主=>女王
  • 女王,君主=>王后,君主

但上述情况并没有改变结果。我想得出结论,也许你只能在查询时使用过滤器,但是如果术语聚合工作,为什么不应该过滤,因此我认为我的同义词过滤器配置是错误的。可以找到更广泛的同义词过滤器示例here

问题

如何在过滤器聚合中使用/配置同义词?

复制上述案例的示例: 1.创建和配置索引:

PUT /my_index
{
  "settings": {
    "analysis": {
      "filter": {
        "my_synonym_filter": {
          "type": "synonym",
          "synonyms": [
            "wlh,wellhead=>wellwell"
          ]
        }
      },
      "analyzer": {
        "my_synonyms": {
          "tokenizer": "standard",
          "filter": [
            "lowercase",
            "my_synonym_filter"
          ]
        }
      }
    }
  }
}

PUT my_index/_mapping/job
{
  "properties": {
    "title":{
      "type": "string",
      "analyzer": "my_synonyms"
    }
  }
}

2.输入两份文件:

PUT my_index/job/1
{
    "title":"wellhead smth else"
}

PUT my_index/job/2
{
    "title":"wlh other stuff"
}

3.在 wlh 上执行搜索,该搜索应返回2个文档;有一个术语聚合,应该有 wellwell 的2个文档和一个不应该有0个计数的过滤器:

POST my_index/_search
{
  "size": 0,
  "query" : {
      "match" : {
         "title":{
            "query": "wlh",
            "operator": "and"
         }
      }
   },
     "aggs" : {
        "wlhAggs" : {
            "terms" : { "field" : "title" }
        },
        "wlhFilter" : {
            "filter" : { "term": { "title": "wlh"     } }
        }
    },
   "explain" : 0
}

此查询的结果是:

   {
   "took": 8,
   "timed_out": false,
   "_shards": {
      "total": 5,
      "successful": 5,
      "failed": 0
   },
   "hits": {
      "total": 2,
      "max_score": 0,
      "hits": []
   },
   "aggregations": {
      "wlhAggs": {
         "doc_count_error_upper_bound": 0,
         "sum_other_doc_count": 0,
         "buckets": [
            {
               "key": "wellwell",
               "doc_count": 2
            },
            {
               "key": "else",
               "doc_count": 1
            },
            {
               "key": "other",
               "doc_count": 1
            },
            {
               "key": "smth",
               "doc_count": 1
            },
            {
               "key": "stuff",
               "doc_count": 1
            }
         ]
      },
      "wlhFilter": {
         "doc_count": 0
      }
   }
}

这就是我的问题,wlhFilter应该至少有1个doc count。

2 个答案:

答案 0 :(得分:1)

我的时间很短,所以如果需要,我可以在今天/明天稍后再详细说明一下。但以下情况应该有效:

DELETE /my_index
PUT /my_index
{
  "settings": {
    "analysis": {
      "filter": {
        "my_synonym_filter": {
          "type": "synonym", 
          "synonyms": [ 
            "british,english",
            "queen,monarch"
          ]
        }
      },
      "analyzer": {
        "my_synonyms": {
          "tokenizer": "standard",
          "filter": [
            "lowercase",
            "my_synonym_filter" 
          ]
        }
      }
    }
  },
  "mappings": {
    "test": {
      "properties": {
        "title": {
          "type": "text",
          "analyzer": "my_synonyms",
          "fielddata": true
        }
      }
    }
  }
}
POST my_index/test/1
{
  "title" : "the british monarch"
}

GET my_index/_search
{
  "query": {
    "match": {
      "title": "queen"
    }
  }
}

GET my_index/_search
{
  "query": {
    "match": {
      "title": "queen"
    }
  }, 
  "aggs": {
    "queen_filter": {
      "filter": {
        "term": {
          "title": "queen"
        }
      }
    },
    "monarch_filter": {
      "filter": {
        "term": {
          "title": "monarch"
        }
      }
    }
  }
}

您可以分享您为status.synonym字段定义的映射吗?

编辑:V2

您的过滤器输出为0的原因是因为Elasticsearch中的过滤器永远不会经历分析阶段。这意味着完全匹配。

令牌' wlh'在您的聚合中,不会被翻译为“井井”,这意味着它不会出现在倒排索引中。这是因为,在索引时间内,您需要做的事情是' wlh'被翻译成' wellwell'。 为了达到您想要的效果,您必须将数据索引到单独的字段中并相应地调整过滤器。

您可以尝试以下方式:

DELETE my_index
PUT /my_index
{
  "settings": {
    "number_of_shards": 1, 
    "number_of_replicas": 0, 
    "analysis": {
      "filter": {
        "my_synonym_filter": {
          "type": "synonym",
          "synonyms": [
            "wlh,wellhead=>wellwell"
          ]
        }
      },
      "analyzer": {
        "my_synonyms": {
          "tokenizer": "standard",
          "filter": [
            "lowercase",
            "my_synonym_filter"
          ]
        }
      }
    }
  },
  "mappings": {
    "job": {
      "properties": {
        "title": {
          "type": "string",
          "fields": {
            "synonym": {
              "type": "string",
              "analyzer": "my_synonyms"
            }
          }
        }
      }
    }
  }
}

PUT my_index/job/1
{
    "title":"wellhead smth else"
}

PUT my_index/job/2
{
    "title":"wlh other stuff"
}

POST my_index/_search
{
  "size": 0,
  "query": {
    "match": {
      "title.synonym": {
        "query": "wlh",
        "operator": "and"
      }
    }
  },
  "aggs": {
    "wlhAggs": {
      "terms": {
        "field": "title.synonym"
      }
    },
    "wlhFilter": {
      "filter": {
        "term": {
          "title": "wlh"
        }
      }
    }
  }
}

输出:

{
  "aggregations": {
    "wlhAggs": {
      "doc_count_error_upper_bound": 0,
      "sum_other_doc_count": 0,
      "buckets": [
        {
          "key": "wellwell",
          "doc_count": 2
        },
        {
          "key": "else",
          "doc_count": 1
        },
        {
          "key": "other",
          "doc_count": 1
        },
        {
          "key": "smth",
          "doc_count": 1
        },
        {
          "key": "stuff",
          "doc_count": 1
        }
      ]
    },
    "wlhFilter": {
      "doc_count": 1
    }
  }
}

希望这有帮助!!

答案 1 :(得分:1)

所以在@Byron Voorbach的帮助下,他的评论是我的解决方案:

  • 我创建了一个单独的字段,我使用同义词分析器,as 反对拥有属性字段(mainfield.property)。
  • 最重要的是问题是我的同义词已经签约了!一世 有,例如,英国,英语=>英国。改变为 英国,英国,英国解决了我的问题,过滤器聚合是 返回正确数量的文件。

希望这有助于某人,或者至少指向正确的方向。

编辑: 哦,主人赞美文件!我用Filters(S!)聚合(链接here)完全解决了我的问题。在过滤器配置中,我指定了匹配类型的查询,它工作正常!结束了这样的事情:

"aggs" : {
    "messages" : {
      "filters" : {
        "filters" : {
          "status" :   { "match" : { "cats.saurus" : "monarch"   }},
          "country" : { "match" : { "cats.saurus" : "british" }}
        }
      }
    }
  }