Elasticsearch（五）基础的 CRUD

新增文档

语法格式：

PUT /Index/Type/id
{
  "json数据"
}

Elasticsearch 会自动建立 Index 和 Type，不需要提前创建，而且 Elasticsearch 默认会对 Document 的每个 field 都建立倒排索引，让其可以被搜索。

PUT /store/product/1
{
  "name": "gaolujie yagao",
  "desc": "gaoxiao meibai",
  "price": 30,
  "producer": "gaolujie producer",
  "tags": [
    "meibai",
    "fangzhu"
  ]
}

PUT /store/product/2
{
  "name": "jiajieshi yagao",
  "desc": "youxiao fangzhu",
  "price": 25,
  "producer": "jiajieshi producer",
  "tags": [
    "fangzhu"
  ]
}

PUT /store/product/3
{
  "name": "zhonghua yagao",
  "desc": "caoben zhiwu",
  "price": 40,
  "producer": "zhonghua producer",
  "tags": [
    "qingxin"
  ]
}

新增返回结果：

{
  "_index": "store",
  "_type": "product",
  "_id": "1",
  "_version": 1,
  "result": "created",
  "_shards": {
    "total": 2,
    "successful": 1,
    "failed": 0
  },
  "created": true
}

查询文档

语法格式：

GET /Index/Type/id

执行 GET /store/product/1，返回结果：

{
  "_index": "store",
  "_type": "product",
  "_id": "1",
  "_version": 1,
  "found": true,
  "_source": {
    "name": "gaolujie yagao",
    "desc": "gaoxiao meibai",
    "price": 30,
    "producer": "gaolujie producer",
    "tags": [
      "meibai",
      "fangzhu"
    ]
  }
}

修改文档

替换文档

PUT /store/product/1
{
  "name": "jiaqiangban gaolujie yagao",
  "desc": "gaoxiao meibai",
  "price": 30,
  "producer": "gaolujie producer",
  "tags": [
    "meibai",
    "fangzhu"
  ]
}

返回结果：

{
  "_index": "store",
  "_type": "product",
  "_id": "1",
  "_version": 2,
  "result": "updated",
  "_shards": {
    "total": 2,
    "successful": 1,
    "failed": 0
  },
  "created": false
}

查询：GET /store/product/1，返回结果：

{
  "_index": "store",
  "_type": "product",
  "_id": "1",
  "_version": 2,
  "found": true,
  "_source": {
    "name": "jiaqiangban gaolujie yagao",
    "desc": "gaoxiao meibai",
    "price": 30,
    "producer": "gaolujie producer",
    "tags": [
      "meibai",
      "fangzhu"
    ]
  }
}

替换方式有一个不好，即必须带上所有的 field，才能去进行信息的修改。

更新文档（更新 ！= 替换）

POST /store/product/1/_update
{
  "doc": {
    "name": "jiaqiangban2 gaolujie yagao"
  }
}

返回结果：

{
  "_index": "store",
  "_type": "product",
  "_id": "1",
  "_version": 3,
  "result": "updated",
  "_shards": {
    "total": 2,
    "successful": 1,
    "failed": 0
  }
}

查询：GET /store/product/1，返回结果：

{
  "_index": "store",
  "_type": "product",
  "_id": "1",
  "_version": 3,
  "found": true,
  "_source": {
    "name": "jiaqiangban2 gaolujie yagao",
    "desc": "gaoxiao meibai",
    "price": 30,
    "producer": "gaolujie producer",
    "tags": [
      "meibai",
      "fangzhu"
    ]
  }
}

删除文档

语法格式：

DELETE /Index/Type/id

执行 DELETE /store/product/1，返回结果：

{
  "found": true,
  "_index": "store",
  "_type": "product",
  "_id": "1",
  "_version": 4,
  "result": "deleted",
  "_shards": {
    "total": 2,
    "successful": 1,
    "failed": 0
  }
}