弹性搜索查询优先级

如何解决弹性搜索查询优先级

如果我们搜索“ Padma Priya”并且存在完全匹配的内容，那么我们需要首先显示该结果，但实际上是因为关键字密度和权重，它首先显示“ Padma”帖子。

如果没有“ Padma Priya”，那么我们希望根据关键字密度和权重显示“ Padma”结果和“ Priya”结果。

如果我们在文本和URL中都找到了“ Padma Priya”关键字，那么我们需要将该页面内容后的URL和Title设置为高优先级。

这是我的查询：

{
            searchBody = {
                "from" : 0,"size" : size,"query": {
                    "bool": {
                        "should" : [
                            {
                              "match": {
                                "location": {
                                  "query": q,// "boost": 5
                                }
                              }
                            },{
                              "match": {
                                "title": {
                                  "query": q,"boost": 5
                                }
                              }
                            },{
                              "match": {
                                "description": {
                                  "query": q
                                }
                              }
                            }
                          ]
                    }
                }
            };

}

解决方法

如ES boost doc第一个查询所示，您可以看到如何为title字段提供比页面内容更多的提升/优先级，这是非常常见的用例。

{
  "mappings": {
    "properties": {
      "title": {
        "type": "text","boost": 2 ---> note this same text will get twice priority/boost if found in title field.
      },"content": {
        "type": "text"
      }
    }
  }
}

对于的第一个用例，如果我们搜索“ Padma Priya”，并且有完全匹配的结果，则需要将词组查询与现有查询结合起来以在顶部获得结果

以下示例将清除概念：

索引样本文档，索引将自动创建。

{
   "title" : "Padma is the author of post","content" : "If we search for Padma and is there any exact match then we need to show that result first but what happening is It's showing Padma posts first only because of keyword density and weightage."
}

索引另一个以padam priya作为短语的文档：

{
   "title" : "Padma Priya","content" : "If we search for Padma and is there any exact match then we need to show that result first but what happening is It's showing Padma posts first only because of keyword density and weightage."
}

搜索查询

{
    "query": {
        "bool": {
            "should": [
                {
                    "multi_match": {
                        "query": "Padma Priya","fields": [
                            "title^3",--> this will give 3X priority of title field
                            "content"
                        ]
                    }
                },{
                    "match_phrase": {
                        "title": "Padma Priya"
                    }
                }
            ]
        }
    }
}

和搜索结果

 "hits": [
            {
                "_index": "indexboost","_type": "_doc","_id": "1","_score": 1.8336343,// note high score for exact match
                "_source": {
                    "title": "Padma Priya","content": "If we search for Padma and is there any exact match then we need to show that result first but what happening is It's showing Padma posts first only because of keyword density and weightage."
                }
            },{
                "_index": "indexboost","_id": "2","_score": 0.9081677,"_source": {
                    "title": "Padma is the author of post","content": "If we search for Padma and is there any exact match then we need to show that result first but what happening is It's showing Padma posts first only because of keyword density and weightage."
                }
            }
        ]