Elasticsearch （三） 文档

新建文档（动态创建）

系统会自动帮助创建"表结构"，缺点：创建出来的数据类型不够严谨，比如时间字段"createTime"会自动创建为字符型

//格式
[PUT] http://host:port/索引名称/文档类型/文档Id
文档id,可省略，当省略时，系统自动生成
//例如
[PUT] http://host:port/news/news_info/1

//参数
{
    "newsType ":"sport",
    "title":"中国国奥队无缘东京奥运会",
    "author":true,
    "readNumber":1,
    "createTime":"2020-1-14 17:16:22",
    "content":"1月12日，中国国奥队球员胡靖航（左）在比赛中带球突破。 当日..."
}
//返回
{
    "_index": "news",
    "_type": "news_info",
    "_id": "1",
    "_version": 1,
    "result": "created",
    "_shards": {
        "total": 2,
        "successful": 1,
        "failed": 0
    },
    "_seq_no": 0,
    "_primary_term": 3
}

新建文档（静态创建）

有点类似于数据库中的创建表结构

//格式
[PUT] http://host:port/索引名称
文档id,可省略，当省略时，系统自动生成
//例如
[PUT] http://host:port/news
//参数
{
    "mappings":{
        "news_info":{
            "_all":{"enabled":false},
            "properties":{
                "id":{"type":"text"},
                "title":{"type":"text"},
                "author":{"type":"text"},
                "createTime":{ "type": "date","format": "yyyy-MM-dd HH:mm:ss||yyyy-MM-dd||epoch_millis"},
                "newsType":{"type":"keyword"},
                "readNumber":{"type":"long"}
            }
        }
        
    }
}

获取文档信息

//格式
[GET] http://host:port/索引名称/文档类型/文档Id
//例如
[GET] http://host:port/news/news_info/1

//返回
{
    "_index": "news",
    "_type": "news_info",
    "_id": "1",
    "_version": 1,
    "_seq_no": 1,
    "_primary_term": 3,
    "found": true,
    "_source": {
        "newsType ": "sport",
        "title": "中国国奥队无缘东京奥运会",
        "author": true,
        "read_number": 1,
        "create_time": "2020-1-14 17:16:22",
        "content": "1月12日，中国国奥队球员胡靖航（左）在比赛中带球突破。 当日，在..."
    }
}

更新文档内容

//格式
[POST] http://host:port/索引名称/文档类型/文档Id/_update
//例如
[POST] http://host:port/news/news_info/1/_update

//参数
①普通方式
{
    "doc":{
        "title":"中国国奥队无缘东京奥运会UPDATE-TEST"
    }
}

②脚本方式
{
    "script":{
        "inline":"ctx._source.title = params.title",
        "params":{
            "title":"中国国奥队无缘东京奥运会UPDATE"
        }
    }
}

//返回
{
    "_index": "news",
    "_type": "news_info",
    "_id": "1",
    "_version": 8,
    "result": "updated",
    "_shards": {
        "total": 2,
        "successful": 1,
        "failed": 0
    },
    "_seq_no": 7,
    "_primary_term": 3
}

查询文档

//格式
[GET] http://host:port/索引名称/文档类型/_search
//例如
[GET] http://host:port/news/news_info/_search

//返回
{
    "took": 6,
    "timed_out": false,
    "_shards": {
        "total": 5,
        "successful": 5,
        "skipped": 0,
        "failed": 0
    },
    "hits": {
        "total": 2,
        "max_score": 1.0,
        "hits": [
            {
                "_index": "news",
                "_type": "news_info",
                "_id": "2",
                "_score": 1.0,
                "_source": {
                    "newsType ": "sport",
                    "title": "中国国奥队无缘东京奥运会",
                    "author": true,
                    "read_number": 1,
                    "create_time": "2020-1-14 17:16:22",
                    "content": "1月12日，中国国奥队球员胡靖航..."
                }
            },
            {
                "_index": "news",
                "_type": "news_info",
                "_id": "1",
                "_score": 1.0,
                "_source": {
                    "newsType ": "sport",
                    "title": "中国国奥队无缘东京奥运会UPDATE-TEST",
                    "author": true,
                    "read_number": 1,
                    "create_time": "2020-1-14 17:16:22",
                    "content": "1月12日，中国国奥队球员胡靖航..."
                }
            }
        ]
    }
}


说明
{
    "took": "整个搜索用了所少毫秒",
    "timed_out": "查询是否超时",
    "_shards": {
        "total": "查询中参与分片的总数",
        "successful": "查询成功的分片数",
        "skipped":  "没有参与的分片数",
        "failed":  "查询失败的分片数"
    },
    "hits": {
        "total": 2,
        "max_score": 1.0,
        "hits": []
    }
}

删除文档

//格式
[DELETE] http://host:port/索引名称/文档类型/文档Id
//例如
[DELETE] http://host:port/news/news_info/2

//返回
{
    "_index": "news",
    "_type": "news_info",
    "_id": "2",
    "_version": 2,
    "result": "deleted",
    "_shards": {
        "total": 2,
        "successful": 1,
        "failed": 0
    },
    "_seq_no": 1,
    "_primary_term": 3
}

。