[英]How can I sort Elastic Search query results based on relevancy?
I am trying to do a search in elastic search
server. 我正在尝试在
elastic search
服务器中进行elastic search
。
Below is my case: 以下是我的情况:
Given a term "Hello World"
to the search API, return me all the documents with: 给搜索API一个术语
"Hello World"
,返回所有文档:
I want to do the above in a single query. 我想在一个查询中执行上述操作。 I am aware that individually all of them can be done using match_phrase, and default_operator for OR/AND.
我知道,所有这些都可以使用match_phrase和default_operator进行OR / AND。 But I want all the three to be done in a single query.
但我希望所有这三个都在一个查询中完成。
I want the results to be sorted based on relevancy. 我希望根据相关性对结果进行排序。 So if a document contains the exact phrase, it is most relevant.If the document contains both the words (AND) some where in it, it is moderately relevant.
因此,如果文档包含确切的短语,则它是最相关的。如果文档中包含单词(AND),则其中的某些位置具有中等相关性。 And if the document contains at least one of the word(OR), it is least relevant.
如果文档包含至少一个单词(OR),则它最不相关。
Is it possible in elastic search as of now ? 到目前为止,弹性搜索是否可行?
This is something you might require: 这是您可能需要的:
Query String
请求参数
https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-query-string-query.html https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-query-string-query.html
{
"query":
{
"query_string" :
{
"query" : "Hello World"
}
}
}
This will fetch you all combinations : 这将获取所有组合:
You want to check Bool Query and possibly Boosting Query Clauses . 您想要检查Bool查询以及可能的Boosting Query子句 。
For your example, you can do 举个例子,你可以做到
{
"query": {
"bool": {
"should": [
{
"match": {
"FIELDNAME": {
"query": "Hello",
"boost": 1
}
}
},
{
"match": {
"FIELDNAME": {
"query": "World",
"boost": 1
}
}
},
{
"match_phrase": {
"FIELDNAME": {
"query": "Hello World",
"boost": 2
}
}
}
],
"minimum_should_match" : 1
}
}
}
This is asking that at least 1 between your three conditions is true ( minimum_should_match
). 这要求您的三个条件之间至少有1个为真(
minimum_should_match
)。 The more conditions are satisfied, the higher score the document will have (so it will be returned first), like you wished. 满足的条件越多,文档的得分就越高(因此它将首先返回),就像您希望的那样。 You can
boost
the importance of a condition, here I went for doubling the importance of whole phrase match, but it's just an example. 你可以
boost
条件的重要性,在这里我将整个短语匹配的重要性加倍,但这只是一个例子。
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