在elasticsearch中，如何按计数排序

Question

我有两个表：用户和文章，现在我想获取一个用户列表，该列表按每个人的文章以及日期范围排序。

我设置了elasticsearch索引：

PUT /users/_mapping
{
  "properties":{
    "id": {
      "type": "long"
    },
    "create_time": {
      "type": "date",
      "format": "yyyy-MM-dd"
    },
    "articles":{
      "type":"nested",
      "properties": {
        "id": {
          "type": "long"
        },
        "content": {
          "type": "text"
        },
        "create_time": {
          "type": "date",
          "format": "yyyy-MM-dd"
        }
      }
    }
  }
}

数据如下：

{
  "id":1,
  "create_time": "2023-12-20",
  "articles": [
    {"id": 21, "content":"1111", "create_time": "2023-12-20"},
    {"id": 22, "content":"1111", "create_time": "2023-12-21"},
    {"id": 23, "content":"1111", "create_time": "2023-12-21"},
    {"id": 24, "content":"1111", "create_time": "2023-12-22"},
    {"id": 24, "content":"1111", "create_time": "2023-12-23"}
  ]
}

{
  "id":2,
  "create_time": "2023-12-20",
  "articles": [
    {"id": 21, "content":"1111", "create_time": "2023-12-20"},
    {"id": 22, "content":"1111", "create_time": "2023-12-21"},
    {"id": 23, "content":"1111", "create_time": "2023-12-22"},
    {"id": 24, "content":"1111", "create_time": "2023-12-22"},
    {"id": 24, "content":"1111", "create_time": "2023-12-22"},
    {"id": 25, "content":"1111", "create_time": "2024-12-31"}
  ]
}

{
  "id":3,
  "create_time": "2023-12-20",
  "articles": [
    {"id": 21, "content":"1111", "create_time": "2023-12-20"},
    {"id": 22, "content":"1111", "create_time": "2023-12-21"},
    {"id": 23, "content":"1111", "create_time": "2023-12-21"},
    {"id": 24, "content":"1111", "create_time": "2023-12-21"},
    {"id": 24, "content":"1111", "create_time": "2023-12-22"},
    {"id": 25, "content":"1111", "create_time": "2024-12-31"}
  ]
}

{
  "id":4,
  "create_time": "2023-12-10",
  "articles": [
    {"id": 21, "content":"1111", "create_time": "2023-12-10"},
    {"id": 22, "content":"1111", "create_time": "2023-12-11"},
    {"id": 23, "content":"1111", "create_time": "2023-12-21"},
    {"id": 24, "content":"1111", "create_time": "2023-12-21"},
    {"id": 24, "content":"1111", "create_time": "2023-12-21"},
    {"id": 25, "content":"1111", "create_time": "2024-12-31"}
  ]
}

如果客户发布日期：2023-12-20 和 2023-12-21 将得到： create_time在2023年12月20日和2023年12月21日之间的用户； 按create_time在2023-12-20和2023-12-21之间的文章编号排序；

所以，列表数据： id: 3 有 4 篇文章 id: 1 有 3 篇文章 id: 2 有 2 篇文章

没有 id:4，因为 create_time 不在 2023-12-20 和 2023-12-21 之间

我的查询是这样的：

GET /users/_search
{
    "query": {
        "bool": {
            "must": [{
                "range": {
                    "create_time": {
                        "gte": "2023-12-20",
                        "lte": "2023-12-21"
                    }
                }
            }]
        }
    },
    "aggs": {
        "articles": {
            "nested": {
                "path": "articles"
            },
            "aggs": {
                "articles": {
                    "filter": {
                        "bool": {
                            "must": [{
                                "range": {
                                    "articles.create_time": {
                                        "gte": "2023-12-20",
                                        "lte": "2023-12-21",
                                        "format": "yyyy-MM-dd"
                                    }
                                }
                            }]
                        }
                    }
                }
            }
        }
    },
    "size": 0
}

Answer 1

您需要使用reverse_nested查询。这是您更新的查询：

GET /users/_search
{
  "size": 0,
  "query": {
    "bool": {
      "must": [
        {
          "range": {
            "create_time": {
              "gte": "2023-12-20",
              "lte": "2023-12-21"
            }
          }
        }
      ]
    }
  },
  "aggs": {
    "articles": {
      "nested": {
        "path": "articles"
      },
      "aggs": {
        "filter_date": {
          "filter": {
            "bool": {
              "must": [
                {
                  "range": {
                    "articles.create_time": {
                      "gte": "2023-12-20",
                      "lte": "2023-12-21",
                      "format": "yyyy-MM-dd"
                    }
                  }
                }
              ]
            }
          },
          "aggs": {
            "test": {
              "reverse_nested": {},
              "aggs": {
                "NAME": {
                  "terms": {
                    "field": "id"
                  },
                  "aggs": {
                    "NAME": {
                      "nested": {
                        "path": "articles"
                      },
                      "aggs": {
                        "NAME": {
                          "filter": {
                            "bool": {
                              "must": [
                                {
                                  "range": {
                                    "articles.create_time": {
                                      "gte": "2023-12-20",
                                      "lte": "2023-12-21",
                                      "format": "yyyy-MM-dd"
                                    }
                                  }
                                }
                              ]
                            }
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}