72_数据建模实战_祖孙三层数据关系建模以及搜索实战

72_数据建模实战_祖孙三层数据关系建模以及搜索实战

父子关系，祖孙三层关系的数据建模，搜索

PUT /company
{
  "mappings": {
    "country": {},
    "rd_center": {
      "_parent": {
        "type": "country" 
      }
    },
    "employee": {
      "_parent": {
        "type": "rd_center" 
      }
    }
  }
}

country -> rd_center -> employee，祖孙三层数据模型

添加数据---country(爷爷) 层

POST /company/country/_bulk
{ "index": { "_id": "1" }}
{ "name": "中国" }
{ "index": { "_id": "2" }}
{ "name": "美国" }

添加数据---re_center(父亲)

POST /company/rd_center/_bulk
{ "index": { "_id": "1", "parent": "1" }}
{ "name": "北京研发总部" }
{ "index": { "_id": "2", "parent": "1" }}
{ "name": "上海研发中心" }
{ "index": { "_id": "3", "parent": "2" }}
{ "name": "硅谷人工智能实验室" }

添加数据employee(孙)

PUT /company/employee/1?parent=1&routing=1
{
  "name":  "张三",
  "dob":   "1970-10-24",
  "hobby": "爬山"
}

routing参数的讲解，必须跟grandparent相同，否则有问题

country，用的是自己的id去路由; rd_center，parent，用的是country的id去路由; employee，如果也是仅仅指定一个parent，那么用的是rd_center的id去路由，这就导致祖孙三层数据不会在一个shard上

孙子辈儿，要手动指定routing，指定为爷爷辈儿的数据的id

搜索有爬山爱好的员工所在的国家

GET /company/country/_search
{
  "query": {
    "has_child": {
      "type": "rd_center",
      "query": {
        "has_child": {
          "type": "employee",
          "query": {
            "match": {
              "hobby": "爬山"
            }
          }
        }
      }
    }
  }
}

聚合结果:

{
"took": 10,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 1,
"max_score": 1,
"hits": [
{
"_index": "company",
"_type": "country",
"_id": "1",
"_score": 1,
"_source": {
"name": "中国"
}
}
]
}
}