#{
#  "keywordGroups": [
#    ["Luke.Ye", "设计模式"],
#  ]
#}
# 表示 (设计模式 AND Luke.Ye)
POST /documents/_search
{
  "query": {
    "bool": {
      "should": [
        {
          "bool": {
            "must": [
              { "multi_match": { "query": "设计模式", "fields": ["filename", "content"], "type": "phrase" }},
              { "multi_match": { "query": "Luke.Ye", "fields": ["filename", "content"], "type": "phrase" }}
            ]
          }
        }
      ],
      "minimum_should_match": 1
    }
  },
  "highlight": {
    "pre_tags": ["<mark>"],
    "post_tags": ["</mark>"],
    "fields": {
      "content": {
        "fragment_size": 100,
        "number_of_fragments": 3
      },
      "filename": {
        "fragment_size": 100,
        "number_of_fragments": 1
      }
    }
  },
  "sort": [
    { "mtime": "desc" }
  ],
  "size": 10,
  "from": 0
}

# 清空索引中的全部内容
POST /documents/_delete_by_query

{
  "query": {
    "match_all": {}
  }
}