Elasticsearch rescore 自定义评分
昨天研究了一下elasticsearch的自定义评分功能，也就是rescore，整理如下： 0.测试数据： user.json
{"index": {"_index": "shellbye","_type": "user","_id": "1"}}
{"name":"jack","age":30,"addr":"Sichuang"}
{"index": {"_index": "shellbye","_type": "user","_id": "2"}}
{"name":"jack jack","age":31,"addr":"Sichuang"}
{"index": {"_index": "shellbye","_type": "user","_id": "3"}}
{"name":"jackson","age":32,"addr":"Sichuang"}
{"index": {"_index": "shellbye","_type": "user","_id": "4"}}
{"name":"jackson jackson","age":33,"addr":"Sichuang"}
将以上文本保存到本地，命名为user.json，然后开启ES，cd到user.json所在目录并使用如下命令将数据添加到ES中。 curl -XPOST localhost:9200/_bulk?pretty –data-binary @user.json
1.basic search 使用chrome的postman构造请求： url地址：http://localhost:9200/shellbye/user/_search 请求方法：post 参数（raw）：
{
"query": {
"match": {
"name": "jackson"
}
}
}
返回结果如下：
{
"took": 1,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 2,
"max_score": 0.30685282,
"hits": [
{
"_index": "shellbye",
"_type": "user",
"_id": "3",
"_score": 0.30685282,
"_source": {
"name": "jackson",
"age": 32,
"addr": "Sichuang"
}
},
{
"_index": "shellbye",
"_type": "user",
"_id": "4",
"_score": 0.2712221,
"_source": {
"name": "jackson jackson",
"age": 33,
"addr": "Sichuang"
}
}
]
}
}
2.rescore 使用chrome的postman构造请求： url地址：http://localhost:9200/shellbye/user/_search 请求方法：post 参数（raw）：
{
"query": {
"match": {
"name": "jackson"
}
},
"rescore": {
"query": {
"rescore_query": {
"function_score": {
"query": {
"match_all": {}
},
"script_score": {
"script": "doc['age'].value"
}
}
}
}
}
}
返回结果如下：
{
"took": 2,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 2,
"max_score": 33.27122,
"hits": [
{
"_index": "shellbye",
"_type": "user",
"_id": "4",
"_score": 33.27122,
"_source": {
"name": "jackson jackson",
"age": 33,
"addr": "Sichuang"
}
},
{
"_index": "shellbye",
"_type": "user",
"_id": "3",
"_score": 32.306854,
"_source": {
"name": "jackson",
"age": 32,
"addr": "Sichuang"
}
}
]
}
}
参考资料： [1].http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/query-dsl-function-score-query.html [2].http://stackoverflow.com/questions/17314123/search-by-size-of-object-type-field-elastic-search [3].https://www.packtpub.com/big-data-and-business-intelligence/mastering-elasticsearch
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