博客和评论：es父子模型

#博客和评论父子模型
PUT /my_blogs
{
  "mappings": {
     "properties": {
       "blog_comments_relation":{
         "type": "join",
         "relations":{
           "blog":"comment"
         }
       },
       "content":{
         "type": "text"
       },
       "title":{
         "type": "keyword"
       }
     }
  }
}


PUT /my_blogs/_doc/blog1
{
  "title":"ELK详解",
  "content":"内容",
  "blog_comments_relation":{
    "name":"blog"
  }
}

PUT /my_blogs/_doc/blog2
{
  "title":"ELK详解2",
  "content":"内容2",
  "blog_comments_relation":{
    "name":"blog"
  }
}




PUT /my_blogs/_doc/c1?routing=blog1
{
  "comment":"xihuan ELK1",
  "username":"jack",
  "blog_comments_relation":{
    "name":"comment",
    "parent":"blog1"
  }
}




PUT /my_blogs/_doc/c2?routing=blog2
{
  "comment":"xihuan ELK2",
  "username":"lise",
  "blog_comments_relation":{
    "name":"comment",
    "parent":"blog2"
  }
}


PUT /my_blogs/_doc/c3?routing=blog1
{
  "comment":"xihuan dfdsfadsfdsafasdfdsafdsa ELK1",
  "username":"lise",
  "blog_comments_relation":{
    "name":"comment",
    "parent":"blog1"
  }
}

# has_child 查询返回父文档
GET /my_blogs/_search
{
  "query": {
    "has_child": {
      "type": "comment",
      "query": {
        "match": {
          "username": "lise"
        }
      }
    }
  }
}



# has_parent 查询返回父文档
GET /my_blogs/_search
{
  "query": {
    "has_parent": {
      "parent_type": "blog",
      "query": {
        "match": {
          "title": "ELK详解"
        }
      }
    }
  }
}