关于用Elasticsearch进行文档管理的的补充

关于用Elasticsearch进行文档管理的的补充

ES数据模型

文档（Document）管理

文件是ES最小数据单元
原始数据：_source:原始JSON格式文档
文档元数据：
_index:索引名
_type 索引类型
_id 文档编号
_version 文档版本号

索引的创建

PUT demo.12         //索引名
{
    "settings" : {
        "index" : {
            "number_of_shards" : 2,            //主分片数量，默认5
            "number_of_replicas" : 2           //副本数量，默认1
        }
    }
}

PUT 更新 或创建

批量操作bulk文件：

PUT _bulk
{"index/create/update/delete":{"_index":"...","_type":"...","_id":"..."}}
{json串，如}

例子，不能换行

{"create":{"_index":"stu","_type":"doc","_id":"1"}}
{"id": 1, "studentNo": "TH-CHEM-2016-C001", "name": "Jonh Smith", "major":"Chemistry", "gpa": 4.8, "yearOfBorn": 2000, "classOf": 2016,  "interest": "soccer, basketball, badminton, chess"}

POST 创建

GET 查看

GET demo.12/_mapping             //查看索引映射

批量读取文档

GET stu/doc/_mget
{"docs":[{"_id":"1"},{"_id":"2"}]}

GET _mget
{"docs":[{"_index":"stu","_type":"doc","_id":"1"},{"_index":"stu","_type":"doc","_id":"2"}]}   //把要查询的条件放入【】中

match_all :返回所有文档

GET stu/_search
{
    "query": {
        "match_all": {}
    }
}

match:对查询的字符进行分词查询，包含就返回

GET stu/_search
{
    "query": {
        "match": {
          "name":"John Tim"
        }
    }
}

match_phrase :短语匹配查询，结果必须包含所有分词

GET stu/_search
{
    "query": {
        "match_phrase": {
          "name":"John Kerry"
        }
    }
}

range:范围查询

GET stu/_search
{"query": {
        "range" : {
            "yearOfBorn" : {
                "gte" : 1995,            //大于等于
                "lte" : 2000             //小于等于
            }
        }
    }
}

bool 布尔查询（多条件查询）

GET stu/_search
{
    "query": {
      "bool": {
        "must": {
            "match": { "interest": "cooking"} ,
            ...,
            "range": { "yearOfBorn": { "gte": 1995, "lte": 2000 }}}
        "must_not": {
            "range": { "yearOfBorn": { "gte": 1995, "lte": 2000 }}}
      }
    }
}

DELETE删除

DELETE 索引名               //删除索引