我花了最近两天调查这个令人费解的问题：我有一个带有自定义映射的索引，我在其上执行一些聚合。问题是，在数字字段的聚合结果中，它返回的数值不会出现在导入数据的数据库中，即使结果数量相同。
我发现了类似的问题here，其中问题是跨越索引的字段映射不一致，但在我的情况下，它被映射为相同的类型。问题发生在字段：award.value.amount，award.value.x_amountEur，tender.value.x_amountEur，据我所检查。这是我curl -XGET 'http://localhost:9200/documents/_mappings?pretty&human'
所述的当前映射（包含目标字段）：
{
"documents" : {
"mappings" : {
"document" : {
"properties" : {
"additionalIdentifiers" : {
"type" : "string",
"index" : "not_analyzed"
},
"award" : {
"type" : "nested",
"properties" : {
"_id" : {
"properties" : {
"$oid" : {
"type" : "string"
}
}
},
"contract_number" : {
"type" : "string",
"index" : "not_analyzed"
},
"date" : {
"type" : "nested",
"properties" : {
"_id" : {
"properties" : {
"$oid" : {
"type" : "string"
}
}
},
"x_day" : {
"type" : "integer"
},
"x_month" : {
"type" : "integer"
},
"x_year" : {
"type" : "integer"
}
}
},
"description" : {
"type" : "string"
},
"initialValue" : {
"type" : "nested",
"properties" : {
"_id" : {
"properties" : {
"$oid" : {
"type" : "string"
}
}
},
"amount" : {
"type" : "float"
},
"currency" : {
"type" : "string"
},
"x_vat" : {
"type" : "float"
}
}
},
"minValue" : {
"type" : "nested",
"properties" : {
"_id" : {
"properties" : {
"$oid" : {
"type" : "string"
}
}
},
"amount" : {
"type" : "float"
},
"x_amountEur" : {
"type" : "float"
}
}
},
"title" : {
"type" : "string"
},
"value" : {
"type" : "nested",
"properties" : {
"_id" : {
"properties" : {
"$oid" : {
"type" : "string"
}
}
},
"amount" : {
"type" : "float"
},
"currency" : {
"type" : "string"
},
"x_amountEur" : {
"type" : "float"
},
"x_vat" : {
"type" : "float"
},
"x_vatbool" : {
"type" : "boolean"
}
}
},
"x_initialValue" : {
"type" : "nested",
"properties" : {
"_id" : {
"properties" : {
"$oid" : {
"type" : "string"
}
}
},
"x_amountEur" : {
"type" : "float"
},
"x_vatbool" : {
"type" : "boolean"
}
}
}
}
},
"awardCriteria" : {
"type" : "string"
},
"contract_number" : {
"type" : "string"
},
"document_id" : {
"type" : "string",
"index" : "not_analyzed"
},
"numberOfTenderers" : {
"type" : "string"
},
"procurementMethod" : {
"type" : "string"
},
"procuring_entity" : {
"type" : "nested",
"properties" : {
"_id" : {
"properties" : {
"$oid" : {
"type" : "string"
}
}
},
"address" : {
"type" : "nested",
"properties" : {
"_id" : {
"properties" : {
"$oid" : {
"type" : "string"
}
}
},
"country" : {
"type" : "string"
},
"countryName" : {
"type" : "string",
"index" : "not_analyzed"
},
"email" : {
"type" : "string"
},
"locality" : {
"type" : "string"
},
"postalCode" : {
"type" : "string"
},
"streetAddress" : {
"type" : "string"
},
"telephone" : {
"type" : "string"
},
"x_url" : {
"type" : "string"
}
}
},
"name" : {
"type" : "string"
},
"x_slug" : {
"type" : "string",
"index" : "not_analyzed"
}
}
},
"suppliers" : {
"type" : "nested",
"properties" : {
"_id" : {
"properties" : {
"$oid" : {
"type" : "string"
}
}
},
"address" : {
"properties" : {
"_id" : {
"properties" : {
"$oid" : {
"type" : "string"
}
}
},
"email" : {
"type" : "string"
},
"locality" : {
"type" : "string"
},
"postalCode" : {
"type" : "string"
},
"streetAddress" : {
"type" : "string"
},
"telephone" : {
"type" : "string"
},
"x_url" : {
"type" : "string"
}
}
},
"name" : {
"type" : "string"
},
"x_slug" : {
"type" : "string",
"index" : "not_analyzed"
}
}
},
"tender" : {
"type" : "nested",
"properties" : {
"_id" : {
"properties" : {
"$oid" : {
"type" : "string"
}
}
},
"value" : {
"type" : "nested",
"properties" : {
"_id" : {
"properties" : {
"$oid" : {
"type" : "string"
}
}
},
"amount" : {
"type" : "float"
},
"currency" : {
"type" : "string"
},
"x_amountEur" : {
"type" : "float"
},
"x_vat" : {
"type" : "float"
},
"x_vatbool" : {
"type" : "boolean"
}
}
}
}
}
这是我用来获取每对供应商之间合约价值的汇总 - procuring_entity：
Document.es.search({
"search_type": "count" ,
"body":{
"aggregations": {
"entities":{
"nested": {
"path": "procuring_entity"
},
"aggs": {
"procuring_entity_names": {
"terms": {
"field": "procuring_entity.x_slug",
"size": 0
},
"aggs": {
"suppliers": {
"nested": {
"path": "suppliers"
},
"aggs": {
"suppliers_names": {
"terms":{
"field": "suppliers.x_slug",
"size": 0
},
"aggs": {
"awards": {
"nested": {
"path": "award.value"
},
"aggs": {
"award_amounts": {
"terms":{
"field": "award.value.x_amountEur",
"size": 0
}
}
}
}
}
}
}
}
}
}
}
}
}
}})
类型float的结果是：
{"entities"=>
{"doc_count"=>24300,
"procuring_entity_names"=>
{"doc_count_error_upper_bound"=>0,
"sum_other_doc_count"=>0,
"buckets"=>
[{"key"=>"vsia-bernu-kliniska-universitates-slimnica",
"doc_count"=>1360,
"suppliers"=>
{"doc_count"=>1360,
"suppliers_names"=>
{"doc_count_error_upper_bound"=>0,
"sum_other_doc_count"=>0,
"buckets"=>
[{"key"=>"recipe-plus-as",
"doc_count"=>388,
"awards"=>
{"doc_count"=>388,
"awards"=>
{"doc_count_error_upper_bound"=>0,
"sum_other_doc_count"=>0,
"buckets"=>
[{"key"=>3679.086669921875, "doc_count"=>373},
{"key"=>0.0, "doc_count"=>12},
{"key"=>73610.3203125, "doc_count"=>1},
{"key"=>244000.0, "doc_count"=>1},
{"key"=>342348.9375, "doc_count"=>1}]}}}
问题是在MongoDB中，同样的查询返回388个文档，这些文档都有award.value.x_amountEur = 3679.08661250056，如Mongoid查询所示：
Document.where(:"procuring_entity.x_slug" => "vsia-bernu-kliniska-universitates-slimnica")
.keep_if{|doc| doc.suppliers.first.x_slug == "recipe-plus-as"}
.map{|doc| doc.award.value.x_amountEur}.uniq
=>[3679.08661250056]
直接进入MongoDB的查询返回相同的内容。
我还尝试将目标字段映射为double，结果相同，而long则返回以下内容（更不正确的结果）：
{"entities"=>
{"doc_count"=>24300,
"procuring_entity_names"=>
{"doc_count_error_upper_bound"=>0,
"sum_other_doc_count"=>0,
"buckets"=>
[{"key"=>"vsia-bernu-kliniska-universitates-slimnica",
"doc_count"=>1360,
"suppliers"=>
{"doc_count"=>1360,
"suppliers_names"=>
{"doc_count_error_upper_bound"=>0,
"sum_other_doc_count"=>0,
"buckets"=>
[{"key"=>"recipe-plus-as",
"doc_count"=>388,
"awards"=>
{"doc_count"=>388,
"awards"=>
{"doc_count_error_upper_bound"=>0,
"sum_other_doc_count"=>0,
"buckets"=>
[{"key"=>3679, "doc_count"=>371},
{"key"=>0, "doc_count"=>12},
{"key"=>44300, "doc_count"=>1},
{"key"=>80472, "doc_count"=>1},
{"key"=>331636, "doc_count"=>1},
{"key"=>342348, "doc_count"=>1},
{"key"=>1658805, "doc_count"=>1}]}}}
我正在使用Elasticsearch 2.0，mongoid 5.0.1和mongoid-elasticsearch进行索引。我想不出任何其他事情，所以任何建议都受到欢迎和赞赏。
答案 0 :(得分：2)
我尝试使用ES 2.0测试您的场景，并且有一些我不知道的东西。我无法为award.value.x_amountEur创建存储桶，除非我使用reverse_nested聚合来＆＃34;退出＆＃34;从一个嵌套的路径进入另一个。
所以，我没有使用awards聚合，而是使用相同的聚合，但是＆＃34;包裹＆＃34;在reverse_nested聚合中：
"aggs": {
"getting_back": {
"reverse_nested": {},
"aggs": {
"awards": {
"nested": {
"path": "award.value"
},
"aggs": {
"award_amounts": {
"terms": {
"field": "award.value.x_amountEur"
}
}
}
}
}
}
}
对于这个我看到的东西还不错。
稍后修改：遵循我的更为一般的@Val's建议，完整的解决方案是在reverse_nested和awards使用suppliers聚合