elasticsearch - Elasticsearch 文档提升(如Solr elevateIds)

Question

由于其亚马逊REST API和适用于集群，因此希望从Solr转向Elastic Search。但是，我正在努力想出一种在查询时增强特定文档的方法，例如Solrs elevate方法。有没有一种方法可以做到这一点，如果有的话，任何例子都将非常有用:)

Answer 1

我假设您正在引用Solr QueryElevationComponent。 https://wiki.apache.org/solr/QueryElevationComponent

之前在github上已有关于如何在Elasticsearch中模拟此功能的讨论。 https://github.com/elasticsearch/elasticsearch/issues/1066

这个想法是使用Elasticsearch常数得分查询来为匹配文档应用常数提升。施加足够大的提升，实际上可以得到Solr's Elevate的“赞助搜索”结果。

从文档中:

Constant Score Query

A query that wraps a filter or another query and simply returns a constant score equal to the query boost for every document in the filter. Maps to Lucene ConstantScoreQuery.

{
    "constant_score" : {
        "filter" : {
            "term" : { "user" : "kimchy"}
        },
        "boost" : 1.2
    }
}

The filter object can hold only filter elements, not queries. Filters can be much faster compared to queries since they don’t perform any scoring, especially when they are cached.

A query can also be wrapped in a constant_score query:

{
    "constant_score" : {
        "query" : {
            "term" : { "user" : "kimchy"}
        },
        "boost" : 1.2
    }
}

http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/query-dsl-constant-score-query.html

编辑

使用多次提升的示例:

{
    "query": {
        "bool": {
            "should": [{
                "constant_score": {
                    "filter": {
                        "terms": {
                            "user": ["kimchy", "john"]
                        }
                    },
                    boost: 3
                }
            }, {
                "constant_score": {
                    "filter": {
                        "terms": {
                            "user": ["paul", "ringo"]
                        }
                    },
                    boost: 2
                }
            }]
        }
    }
}