Elasticsearch多索引过滤器

时间:2020-10-21 18:12:34

标签: elasticsearch elasticsearch-5 elasticsearch-aggregation elasticsearch-dsl

我有2个索引,一个存储 users ,另一个存储 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,该查询返回没有文章的所有用户。

我不知道如何从第二个索引中包含的具有相同id / userId字段的第一项中排除。

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,我希望所有没有文章的用户:

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

1 个答案:

答案 0 :(得分:1)

正如@leandrojmp指出的那样,您正在尝试实现类似SQL中的JOIN查询的功能,在该查询中您想返回一个索引中的所有其余记录,而这些记录与第二个索引中的记录不匹配。请参阅此文档,以了解有关joining queries in elasticsearch

的更多信息

我不知道如何从包含的第一个索引项中排除 在第二个索引中,并且具有相同的id / userId字段。

跨多个索引执行查询时,您可以使用_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"
        }
      }
    ]
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