用于查询的function_score跨越多个索引/过滤器未按预期工作

Question

我成功地为针对一个索引运行的查询实现了function_score，但是将函数function_score应用于跨越ElasticSearch 6.2.4中具有不同字段的多个索引的查询。

此查询：

POST /web_document,web_part/_search
{
  "from": 0,
  "size": 100,
  "query": {
    "function_score": {
      "query": {
        "bool": {
          "should": [
            {
              "bool": {
                "must": [
                  {
                    "multi_match": {
                      "type": "best_fields",
                      "query": "sampling probe",
                      "fields": [
                        "titleD.autocomplete^5",
                        "titleE.autocomplete^5"
                      ]
                    }
                  }
                ],
                "filter": [
                  {
                    "term": {
                      "_index": {
                        "value": "web_document"
                      }
                    }
                  }
                ]
              }
            },
            {
              "bool": {
                "must": [
                  {
                    "multi_match": {
                      "type": "best_fields",
                      "query": "sampling probe",
                      "fields": [
                        "textD.autocomplete^5",
                        "textE.autocomplete^5"
                      ]
                    }
                  }
                ],
                "filter": [
                  {
                    "term": {
                      "_index": {
                        "value": "web_part"
                      }
                    }
                  }
                ]
              }
            }
          ]
        }
      },
      "functions": [

        {
          "filter": {
            "bool": {
              "must_not": [
                { "exists": { "field": "revDestDate" } },
                { "exists": { "field": "mutationDate" } }
              ]
            }
          },
          "script_score": {
            "script": "100"
          }
        },

        {
          "filter": {
            "term": {
              "_index": "web_part"
            }
          },
          "gauss": {
            "mutationDate": {
              "origin": "now",
              "scale": "90d",
              "decay": 0.5
            }
          },
          "weight": 20
        },

        {
          "filter": {
            "term": {
              "_index": "web_document"
            }
          },
          "gauss": {
            "revDestDate": {
              "origin": "now",
              "scale": "90d",
              "decay": 0.5
            }
          },
          "weight": 20
        }
      ],
      "score_mode" : "first", 
      "boost_mode": "sum"
    }
  }
}

返回以下错误：

{
  "error": {
    …
    "failed_shards": [
      {
        "index": "web_document",
        …
        "reason": {
          "type": "parsing_exception",
          "reason": "unknown field [mutationDate]",
          …
        }
      },
      {
        "index": "web_part",
        …
        "reason": {
          "type": "parsing_exception",
          "reason": "unknown field [revDestDate]",
          …
        }
      }
    ]
  },
  "status": 400
}

我还尝试将function_score合并到这样的induvidual查询中，  返回相同的错误：

POST /web_document,web_part/_search
{
  "from": 0,
  "size": 100,
  "query": {
    "bool": {
      "should": [
        {
          "function_score": {
            "query": {
              "bool": {
                "must": [
                  {
                    "multi_match": {
                      "type": "best_fields",
                      "query": "sampling probe",
                      "fields": [
                        "titleD.autocomplete^5",
                        "titleE.autocomplete^5"
                      ]
                    }
                  }
                ],
                "filter": [
                  {
                    "term": {
                      "_index": {
                        "value": "web_document"
                      }
                    }
                  }
                ]
              }
            },
            "functions": [
              {
                "gauss": {
                  "revDestDate": {
                    "origin": "now",
                    "scale": "90d",
                    "decay": 0.5
                  }
                }
              }
            ]
          }
        },
        {
          "function_score": {
            "query": {
              "bool": {
                "must": [
                  {
                    "multi_match": {
                      "type": "best_fields",
                      "query": "sampling probe",
                      "fields": [
                        "textD.autocomplete^5",
                        "textE.autocomplete^5"
                      ]
                    }
                  }
                ],
                "filter": [
                  {
                    "term": {
                      "_index": {
                        "value": "web_part"
                      }
                    }
                  }
                ]
              }
            },
            "functions": [
              {
                "gauss": {
                  "mutationDate": {
                    "origin": "now",
                    "scale": "90d",
                    "decay": 0.5
                  }
                }
              }
            ]
          }
        }
      ]
    }
  }
}

根据Darshan Pratil对此问题的评论answer同样的问题，这在过去的版本中有效。

如何在弹性搜索6.2.4中完成？