本节的需求：对已建好冗余数模型的数据进行分组。
本节的语法没有学懂
一、构造更多测试数据
PUT /website/users/3
{
"name": "黄药师",
"email": "huangyaoshi@sina.com",
"birthday": "1970-10-24"
}
PUT /website/blogs/3
{
"title": "我是黄药师",
"content": "我是黄药师啊，各位同学们！！！",
"userInfo": {
"userId": 3,
"username": "黄药师"
}
}
PUT /website/users/2
{
"name": "花无缺",
"email": "huawuque@sina.com",
"birthday": "1980-02-02"
}
PUT /website/blogs/2
{
"title": "花无缺的身世揭秘",
"content": "大家好，我是花无缺，所以我的身世是。。。",
"userInfo": {
"userId": 2,
"username": "花无缺"
}
}
二、对每个用户发表的博客进行分组
比如说，小鱼儿发表的那些博客，花无缺发表了哪些博客，黄药师发表了哪些博客
GET /website/blogs/_search
{
"size": 0,
"aggs": {
"group_by_username": {
"terms": {
"field": "userInfo.username.keyword"
},
"aggs": {
"top_blogs": {
"top_hits": {
"_source": {
"includes": "title"
},
"size": 5
}
}
}
}
}
}