es 复合数据类型——数组，对象和嵌套

嵌套代码如下：

PUT demo
{
  "settings": {
    "number_of_shards": 4,
    "number_of_replicas": 1
  },
  "mappings": {
      "properties": {
        "id": {
          "type": "long"
        },
        "title": {
          "type": "text"
        },
        "university": {
          "type": "nested",
          "properties": {
            "name": {
              "type": "text"
            },
            "foundingYear": {
              "type": "date"
            },
            "address": {
              "type": "text"
            },
            "college": {
              "type": "nested",
              "properties": {
                "name": {
                  "type": "text"
                }
              }
            }
          }
        }
      
    }
  }
}

POST demo/_doc
{
  "id": 1,
  "title": "北京市学校信息列表",
  "university": [
    {
      "name": "清华大学",
      "address": "北京市海淀区双清路30号",
      "foundingYear": "1911-04-09",
      "college": [
        {
          "name": "土木水利学院"
        },
        {
          "name": "信息科学技术学院"
        },
        {
          "name": "材料学院"
        }
      ]
    },
    {
      "name": "北京大学",
      "address": "北京市海淀区颐和园路5号",
      "foundingYear": "1898-06-01",
      "college": [
        {
          "name": "经济学院"
        },
        {
          "name": "外国语学院"
        },
        {
          "name": "信息科学技术学院"
        }
      ]
    }
  ]
}

PUT demo/_doc
{
  "id": 2,
  "title": "上海市学校信息列表",
  "university": [
    {
      "name": "复旦大学",
      "address": "上海市杨浦区邯郸路220号",
      "foundingYear": "1905-06-29",
      "college": [
        {
          "name": "哲学学院"
        },
        {
          "name": "信息科学与工程学院"
        },
        {
          "name": "计算机科学技术学院"
        }
      ]
    },
    {
      "name": "上海交通大学",
      "address": "上海市闵行区东川路800号",
      "foundingYear": "1896-12-01",
      "college": [
        {
          "name": "船舶海洋与建筑工程学院"
        },
        {
          "name": "环境科学与工程学院"
        },
        {
          "name": "外国语学院"
        }
      ]
    }
  ]
}

GET demo/_doc/_search
{
  "_source": {
    "includes": [
      "*"
    ],
    "excludes": [
      "university"
    ]
  },
  "query": {
    "nested": {
      "path": "university",
      "query": {
        "bool": {
          "must": [
            {
              "match": {
                "university.name": "清华"
              }
            }
          ]
        }
      },
      "inner_hits": {}
    }
  }
}

  对象代码如下：

PUT demo2
{
  "settings": {
    "number_of_shards": 4,
    "number_of_replicas": 1
  },
  "mappings": {
      "properties": {
        "id": {
          "type": "long"
        },
        "title": {
          "type": "text"
        },
        "university": {
          "type": "object",
          "properties": {
            "name": {
              "type": "text"
            },
            "foundingYear": {
              "type": "date"
            },
            "address": {
              "type": "text"
            }
          }
        }
      
    }
  }
}

POST demo2/_doc
{
  "id": 1,
  "title": "北京市学校信息列表",
  "university": 
    {
      "name": "北京大学",
      "address": "北京市海淀区颐和园路5号",
      "foundingYear": "1898-06-01"
    }
}

GET demo2/_doc/_search
{
   "query": {
      "bool": {
         "must": [
            {
               "match": {
                  "university.name": "北京"
               }
            }
         ]
      }
   }
}