如何在存储桶选择器聚合中按键过滤

如何解决如何在存储桶选择器聚合中按键过滤

示例问题

| id | lesson_id | part | passed
| 1  | 1         | A    | true
| 2  | 1         | A    | true
| 3  | 1         | B    | false
| 4  | 2         | A    | true
| 5  | 2         | B    | true
| 6  | 3         | A    | false
| 7  | 3         | B    | true

Questions
1. Find lesson_ids where part A has been passed at least once? (Answer lesson id 1)
2. Find lesson_ids where part B has been passed at least once? (Answer lesson id 2)
3. Find lesson_ids where parts A and B have been passed at least once? (Answer lesson id 3)

我想出了以下Elasticsearch查询

{
    "size": 0,"aggs": {
        "lessons": {
      "terms": {
        "field": "lesson_id"
      },"aggs": {
        "parts": {
          "terms": {
            "field": "part"
          },"aggs": {
             "total_passed": {
                  "sum": { "field": "passed"}
             },"passed_parts": {
                "bucket_selector": {
                   "buckets_path": {
                        "totalPassed": "total_passed"
                    },"script": "params.totalPassed >= 1"
                }
            }
         }
        },"both_parts_passed": {
           "bucket_selector": {
                "buckets_path": {
                    "bucketCount": "parts._bucket_count"
                 },"script": "params.bucketCount == 1" // "params.bucketCount == 2" will answer question 3
            }
        }
      }
    }
  }
}

这会给具有课程ID 1和3的简历，因为它们通过了A部分或B部分

{
  "took": 13,"timed_out": false,"_shards": {
    "total": 5,"successful": 5,"skipped": 0,"failed": 0
  },"hits": {
    "total": 8,"max_score": 0.0,"hits": []
  },"aggregations": {
    "lessons": {
      "doc_count_error_upper_bound": 0,"sum_other_doc_count": 0,"buckets": [
        {
          "key": "1","doc_count": 3,"parts": {
            "doc_count_error_upper_bound": 0,"buckets": [
              {
                "key": "A","doc_count": 2,"totalPassed": {
                  "value": 2.0,"value_as_string": "true"
                }
              }
            ]
          }
        },{
          "key": "3","buckets": [
              {
                "key": "B","value_as_string": "true"
                }
              }
            ]
          }
        }
      ]
    }
  }
}

如何进一步选择具有特定键名的存储桶，例如仅包含键名A（问题1），B（问题2）的存储桶？也许还有另一种方法可以做到这一点。