elasticsearch - 查询嵌套对象时，Elasticsearch查询无法返回结果

Question

我有一个看起来像这样的对象:

{
  "id": 123,
  "language_id": 1,
  "label": "Pablo de la Pena",
  "office": {
    "count": 2,
    "data": [
      {
        "id": 1234,
        "is_office_lead": false,
        "office": {
          "id": 1,
          "address_line_1": "123 Main Street",
          "address_line_2": "London",
          "address_line_3": "",
          "address_line_4": "UK",
          "address_postcode": "E1 2BC",
          "city_id": 1
        }
      },
      {
        "id": 5678,
        "is_office_lead": false,
        "office": {
          "id": 2,
          "address_line_1": "77 High Road",
          "address_line_2": "Edinburgh",
          "address_line_3": "",
          "address_line_4": "UK",
          "address_postcode": "EH1 2DE",
          "city_id": 2
        }
      }
    ]
  },
  "primary_office": {
    "id": 1,
    "address_line_1": "123 Main Street",
    "address_line_2": "London",
    "address_line_3": "",
    "address_line_4": "UK",
    "address_postcode": "E1 2BC",
    "city_id": 1
  }
}

我的Elasticsearch映射如下所示:

"mappings": {
  "item": {
    "properties": {
      "office": {
        "properties": {
          "data": {
            "type": "nested",
          }
        }
      }
    }
  }
}

我的Elasticsearch查询看起来像这样:

GET consultant/item/_search
{
  "from": 0,
  "size": 24,
  "query": {
    "bool": {
      "must": [
        {
          "term": {
            "language_id": 1
          }
        },
        {
          "term": {
            "office.data.office.city_id": 1
          }
        }
      ]
    }
  }
}

这将返回零结果，但是，如果我删除第二个 term并将其仅保留在 language_id子句中，则它将按预期工作。

我敢肯定，这归结为我对嵌套对象如何展平的误解，但是我没有主意-我已经尝试了查询和映射的各种排列。

任何指导深表感谢。我正在使用Elasticsearch 6.1.1。

Answer 1

我不确定您是否需要整个记录，此解决方案是否提供每条具有language_id:1并具有office.data.office.id:1值的记录。

GET consultant/item/_search
{
  "from": 0,
  "size": 100,
  "query": {
    "bool":{
      "must": [
        {
          "term": {
            "language_id": {
              "value": 1
            }
          }
        },
        {
          "nested": {
            "path": "office.data",
            "query": {
              "match": {
                      "office.data.office.city_id": 1
              }
            }
          }
        }
      ]
    }
  }
}

我在测试索引中放入了3条不同的记录，以防误击，其中一条具有不同的language_id，另一条具有不同的Office ID，只有匹配的一条返回。
如果您只需要办公室数据，那有点不同，但是仍然可以解决。