Elasticsearch 多索引过滤器

Question

我有 2 个索引，一个存储 users，一个存储 articles.

用户文档：

{
  "id" : "152ce52d-e975-4ebd-849a-0a12f535e644",
  "email": "bob@email.com",
  ...
}

索引映射：

{
  "mapping": {
    "properties": {
      "id": {
        "type": "text",
        "fields": {
          "keyword": {
            "type": "keyword"
          }
        }
      },
      "email": {
        "type": "text",
        "fields": {
          "keyword": {
            "type": "keyword"
          }
        }
      }
    }
  }
}

文章文档：

{
  "articleId" : "002ce52d-e975-4ebd-849a-0a12f535a536",
  "userId": "152ce52d-e975-4ebd-849a-0a12f535e644",
  ...
}

索引映射：

{
  "mapping": {
    "properties": {
      "articleId": {
        "type": "text",
        "fields": {
          "keyword": {
            "type": "keyword"
          }
        }
      },
      "userId": {
        "type": "text",
        "fields": {
          "keyword": {
            "type": "keyword"
          }
        }
      }
    }
  }
}

我正在尝试创建一个多索引查询，returns 所有没有文章的用户。

我不知道如何从第一个索引中排除包含在第二个索引中且具有相同 id/userId 字段的项目。

假设我有以下用户和文章：

用户：

 [
        {
            "id": "user1",
            "email": "bob@email.com"
        },
        {
            "id": "user2",
            "email": "john@email.com"
        },
        {
            "id": "user3",
            "email": "tom@email.com"
        },
        {
            "id": "user4",
            "email": "ben@email.com"
        }
    ]

文章：

[
    {
        "articleId": "id1",
        "userId": "user1"
    },
    {
        "articleId": "id1",
        "userId": "user2"
    }
]

作为查询的结果，我想要所有没有文章的用户：

      [{
            "id": "user3",
            "email": "tom@email.com"
        },
        {
            "id": "user4",
            "email": "ben@email.com"
      }]

Answer 1

正如@leandrojmp 所指出的，您正在尝试在 SQL 中实现类似 JOIN 查询的操作，您希望在其中 returns 来自一个索引的所有剩余记录，这些记录与来自第二个指标。请参阅此文档，以了解有关 joining queries in elasticsearch

的更多信息

I can't figure out how to exclude from the first index items contained in the second index and having the same id/userId field.

跨多个索引执行查询时可以使用_index field。

搜索查询：

{
  "query": {
    "bool": {
      "should": [
        {
          "bool": {
            "must_not": [
              {
                "match": {
                  "id": "user1"
                }
              },
              {
                "match": {
                  "id": "user2"
                }
              }
            ],
            "must": {
              "term": {
                "_index": "64469393user"
              }
            }
          }
        },
       {
          "bool": {
            "must_not": [
              {
                "match": {
                  "userId": "user1"
                }
              },
              {
                "match": {
                  "userId": "user2"
                }
              }
            ],
            "must": {
              "term": {
                "_index": "64469393article"
              }
            }
          }
        }
      ]
    }
  }
}

搜索结果：

"hits": [
      {
        "_index": "64469393user",
        "_type": "_doc",
        "_id": "3",
        "_score": 1.0,
        "_source": {
          "id": "user3",
          "email": "tom@email.com"
        }
      },
      {
        "_index": "64469393user",
        "_type": "_doc",
        "_id": "4",
        "_score": 1.0,
        "_source": {
          "id": "user4",
          "email": "ben@email.com"
        }
      }
    ]

Elasticsearch 多索引过滤器

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