ES基本用法

1.创建 Index，索引名为 news

result = es.indices.create(index='news', ignore=400)

创建成功返回值：{‘acknowledged’: True, ‘shards_acknowledged’: True, ‘index’: ‘news’}

2. 删除 Index

result = es.indices.delete(index='news', ignore=[400, 404])

删除成功返回值：{‘acknowledged’: True}

3. 插入数据

(1) 指定id标识该条数据

# 先创建索引
es.indices.create(index='news', ignore=400) 
# 数据格式
data = {
    'title': '美国留给伊拉克的是个烂摊子吗', 
    'url': 'http://view.news.qq.com/zt2011/usa_iraq/index.htm'}
# 插入
result = es.create(index='news', doc_type='politics', id=1, body=data)

传入了四个参数：

index 参数——索引名称，doc_type ——文档类型，id ——数据的唯一标识 ID，body ——文档具体内容。

插入成功返回值：{‘index’: ‘news’, ‘type’: ‘politics’, ‘id’: ‘1’, ‘version’: 1,‘result’: ‘created’, ‘shards’: {‘total’: 2, ‘successful’: 1, ‘failed’: 0}, ‘seq_no’: 0, ‘primary_term’: 1}

(2) 自动生成id

result = es.index(index='news', doc_type='politics', body=data)

4. 更新数据

需要指定数据的 id 和内容

result = es.update(index='news', doc_type='politics', body=data, id=1)
# 或
result =es.index(index='news', doc_type='politics', body=data, id=1)

更新成功返回值：{‘index’: ‘news’, ‘type’: ‘politics’, ‘id’: ‘1’, ‘version’: 2,‘result’: ‘updated’,‘shards’: {‘total’: 2, ‘successful’: 1, ‘failed’: 0}, ‘seq_no’: 1, ‘_primary_term’: 1}

如果报错：ActionRequestValidationException[Validation Failed: 1: script or doc is missing。解决方法：body中加’doc’节点，把其他包裹起来：body={‘doc’: data}

5. 删除数据

result = es.delete(index='news', doc_type='politics', id=1)

删除成功返回值：{‘index’: ‘news’, ‘type’: ‘politics’, ‘id’: ‘1’, ‘version’: 3,‘result’: ‘deleted’,‘shards’: {‘total’: 2, ‘successful’: 1, ‘failed’: 0}, ‘seq_no’: 2, ‘_primary_term’: 1}

参考：elasticsearch-head的使用 https://www.cnblogs.com/xuwenjin/p/8792919.html