创建索引和数据准备
PUT course
PUT course/_mapping/course
{
"properties": {
"course":{
"type": "nested"
, "properties": {
"key1": {
"type": "text",
"analyzer": "ik_max_word"
},
"key2": {
"type": "text",
"analyzer": "ik_max_word"
},
"course_score": {
"type": "long"
}
}
},
"course_name": {
"type": "text"
, "analyzer": "ik_max_word"
},
"course_id": {
"type": "long"
}
}
}
PUT course/course/1
{
"course":[
{
"key1":"语文,高一,高二,高三",
"key2":"高考作文",
"course_score":15
},
{
"key1":",语文,高二",
"key2":"语文高考",
"course_score":9
},
{
"key1":",努力,学习",
"key2":"高考",
"course_score":9
}
],
"course_name":"语文高考基础题满分策略",
"course_id":13
}
PUT course/course/2
{
"course":[
{
"key1":",其他,高一,高二,高三",
"key2":"鲁林希",
"course_score":21
},
{
"key1":",其他,高一",
"key2":"高考",
"course_score":11
},
{
"key1":",其他,高二,高三",
"key2":"高考",
"course_score":2
}
],
"course_name":"师兄师姐来帮忙-方法篇",
"course_id":220
}
PUT course/course/3
{
"course":[
{
"key1":",其他,高一,高三",
"key2":"高考",
"course_score":21
}
],
"course_name":"师兄师姐来帮忙-自招全流程",
"course_id":221
}查询语句实例
GET course/course/_search
{
"query": {
"function_score": {
"query": {
"bool": {
"must": [
{
"nested": {
"path": "course",
"score_mode": "sum",
"query": {
"function_score": {
"query": {
"bool": {
"must": [
{
"match": {
"course.key1": "高一,高二,高三"
}
},
{
"match": {
"course.key2": "高考"
}
}
]
}
},
"script_score": {
"script": "doc['course.course_score'].value"
}
}
}
}
}
]
}
}
, "script_score": {
"script": "_score"
}
}
}
}原理：
nested文档是独立的数据在nested查询内部，返回的分数作为根文档的评分，所以在nested查询内部再使用一次function_score将内部的数据作为评分传递到根文档。