How to perform date arithmetic between nested and inactive dates in Elasticsearch?

Question

Consider the following Elasticsearch (v5.4) object (document type "award"):

{
  "name": "Gold 1000",
  "date": "2017-06-01T16:43:00.000+00:00",
  "recipient": {
    "name": "James Conroy",
    "date_of_birth": "1991-05-30"
  }
}

The display type for award.dateand award.recipient.date_of_birthis the date.

I want to complete a set of ranges to get a list of age ranges of the recipients of this award ("under 18", "18-24", "24-30", "30+") during their award. I tried the following aggregation request:

{
  "size": 0,
  "query": {"match_all": {}},
  "aggs": {
    "recipients": {
      "nested": {
        "path": "recipient"
      },
      "aggs": {
        "age_ranges": {
          "range": {
            "script": {
              "inline": "doc['date'].date - doc['recipient.date_of_birth'].date"
            },
            "keyed": true,
            "ranges": [{
              "key": "Under 18",
              "from": 0,
              "to": 18
            }, {
              "key": "18-24",
              "from": 18,
              "to": 24
            }, {
              "key": "24-30",
              "from": 24,
              "to": 30
            }, {
              "key": "30+",
              "from": 30,
              "to": 100
            }]
          }
        }
      }
    }
  }
}

Problem 1

But I get the following error due to date comparison in part script:

Cannot apply [-] operation to types [org.joda.time.DateTime] and [org.joda.time.MutableDateTime].

DateTime award.date, MutableDateTime - award.recipient.date_of_birth. - doc['recipient.date_of_birth'].date.toDateTime() ( , Joda, , MutableDateTime , ). - :

"script": "ChronoUnit.YEARS.between(doc['date'].date, doc['recipient.date_of_birth'].date)"

, : (

2

, :

"aggs": {
  "recipients": {
    "nested": {
      "path": "recipient"
    },
    "aggs": {
      "award_years": {
        "terms": {
          "script": {
            "inline": "doc['date'].date.year"
          }
        }
      }
    }
  }
}

1970 doc_count, ES. , , . ( ), (1970, datetime). , ?

, , - , Elasticsearch. !

, , :

curl -XDELETE http://localhost:9200/joelinux
curl -XPUT http://localhost:9200/joelinux -d "{\"mappings\": {\"award\": {\"properties\": {\"name\": {\"type\": \"string\"}, \"date\": {\"type\": \"date\", \"format\": \"yyyy-MM-dd'T'HH:mm:ss.SSSSSSZ\"}, \"recipient\": {\"type\": \"nested\", \"properties\": {\"name\": {\"type\": \"string\"}, \"date_of_birth\": {\"type\": \"date\", \"format\": \"yyyy-MM-dd\"}}}}}}}"
curl -XPUT http://localhost:9200/joelinux/award/1 -d '{"name": "Gold 1000", "date": "2016-06-01T16:43:00.000000+00:00", "recipient": {"name": "James Conroy", "date_of_birth": "1991-05-30"}}'
curl -XPUT http://localhost:9200/joelinux/award/2 -d '{"name": "Gold 1000", "date": "2017-02-28T13:36:00.000000+00:00", "recipient": {"name": "Martin McNealy", "date_of_birth": "1983-01-20"}}'

"joelinux" "", ( " " " " ). !

Answer 1

, . , copy_to:

{
    "mappings": {
        "award": {
            "properties": {
                "name": {
                    "fields": {
                        "keyword": {
                            "ignore_above": 256,
                            "type": "keyword"
                        }
                    },
                    "type": "text"
                },
                "date": {
                    "type": "date"
                },
                "date_of_birth": {
                    "type": "date" // will be automatically filled when indexing documents
                },
                "recipient": {
                    "properties": {
                        "name": {
                            "fields": {
                                "keyword": {
                                    "ignore_above": 256,
                                    "type": "keyword"
                                }
                            },
                            "type": "text"
                        },
                        "date_of_birth": {
                            "type": "date",
                            "copy_to": "date_of_birth" // copy value to root document
                        }
                    },
                    "type": "nested"
                }
            }
        }
    }
}

, date, , , :

Period.between(LocalDate.ofEpochDay(doc['date_of_birth'].date.getMillis() / 86400000L), LocalDate.ofEpochDay(doc['date'].date.getMillis() / 86400000L)).getYears()

JodaTime system.time.LocalDate:

• 1970-01-01
• 1970-01-01, 86400000L ( ).
• LocalDate
• Period
• .

, :

{
    "size": 0,
    "query": {
        "match_all": {}
    },
    "aggs": {
        "age_ranges": {
            "range": {
                "script": {
                    "inline": "Period.between(LocalDate.ofEpochDay(doc['date_of_birth'].date.getMillis() / 86400000L), LocalDate.ofEpochDay(doc['date'].date.getMillis() / 86400000L)).getYears()"
                },
                "keyed": true,
                "ranges": [
                    {
                        "key": "Under 18",
                        "from": 0,
                        "to": 18
                    },
                    {
                        "key": "18-24",
                        "from": 18,
                        "to": 24
                    },
                    {
                        "key": "24-30",
                        "from": 24,
                        "to": 30
                    },
                    {
                        "key": "30+",
                        "from": 30,
                        "to": 100
                    }
                ]
            }
        }
    }
}