How to query in parent-child relation in elasticsearch - elasticsearch

Question

I have parent-child relation for Customer(Parent) and PromotionCustomer(Child).
Customer data:
{
"id": "b7818d4d-566e-24f5-89d2-3995bb97fd5e",
**"externalId": "9200191",**
"name": "LOBLAW NFLD",
"fullName": "LOBLAW NFLD",
"businessSystem": "EBJ/001"
}
PromotionCustomer data:
{
"id" : "31f2e065-a046-9c3a-808b-83545ddb07d1",
"externalId" : "T-000195542",
"businessSystem" : "EBJ/001",
"promotionDescription" : "PM-RT-LOBLAW NFLD-BB",
"promotionType" : "Bill Back",
"promotionStatus" : "Approved",
**"promotionCustomer" : "9200191",**
"validFrom" : "02/28/2019",
"validTo" : "03/20/2019",
"promotionDateTypeCode" : "1"
}
This the mapping details(schema)
{
"promotionsearch" : {
"mappings" : {
"properties" : {
"_class" : {
"type" : "text",
"fields" : {
"keyword" : {
"type" : "keyword",
"ignore_above" : 256
}
}
},
"customer" : {
"type" : "nested",
"include_in_parent" : true,
"properties" : {
"businessSystem" : {
"type" : "keyword"
},
"externalId" : {
"type" : "keyword"
},
"fullName" : {
"type" : "text"
},
"id" : {
"type" : "text"
},
"name" : {
"type" : "text"
}
}
},
"id" : {
"type" : "text",
"fields" : {
"keyword" : {
"type" : "keyword",
"ignore_above" : 256
}
}
},
"promotioncustomer" : {
"type" : "nested",
"include_in_parent" : true,
"properties" : {
"businessSystem" : {
"type" : "keyword"
},
"externalId" : {
"type" : "keyword"
},
"id" : {
"type" : "text"
},
"promotionCustomer" : {
"type" : "text"
},
"promotionDateTypeCode" : {
"type" : "keyword"
},
"promotionDescription" : {
"type" : "text"
},
"promotionProducts" : {
"type" : "text"
},
"promotionStatus" : {
"type" : "keyword"
},
"promotionType" : {
"type" : "keyword"
},
"validFrom" : {
"type" : "date",
"format" : "MM/dd/yyyy"
},
"validTo" : {
"type" : "date",
"format" : "MM/dd/yyyy"
}
}
},
"promotionjoin" : {
"type" : "join",
"eager_global_ordinals" : true,
"relations" : {
"customer" : "promotioncustomer"
}
},
"routing" : {
"type" : "text",
"fields" : {
"keyword" : {
"type" : "keyword",
"ignore_above" : 256
}
}
}
}
}
}
}
I need to get the get the promotionCustomer data based on the externalId which is the customerId which maps to promotionCustomer along with the date range.
I've written a query as below.
GET /promotionsearch/_search
{
"query": {
"has_parent": {
"parent_type": "customer",
"inner_hits": {},
"query": {
"has_child": {
"type": "promotioncustomer",
"query": {
"bool": {
"must": [
{
"match": {
"customer.externalId": "9200191"
}
},
{
"range": {
"promotioncustomer.validFrom": {
"gte": "02/28/2019"
}
}
},
{
"range": {
"promotioncustomer.validTo": {
"lte": "03/20/2019"
}
}
}
]
}
}
}
}
}
}
}
But it's not yielding the result. I know the reason as well. In the has_child clause i'm making use of parent field i.e "customer.externalId". Is there a way to include/add this condition in the parent_type query and then based on the result apply range condition inside has_child

Answer 1

I was able to get the solution. Hope it helps others as well. No need make multiple query call to ES inorder get the desired result.
GET /promotionsearch/_search
{
"query": {
"bool": {
"must": [
{
"match": {
"promotioncustomer.promotionDescription": "PM-RT"
}
},
{
"range": {
"promotioncustomer.validFrom": {
"gte": "02/28/2019"
}
}
},
{
"range": {
"promotioncustomer.validTo": {
"lte": "03/28/2019"
}
}
},
{
"has_parent": {
"parent_type": "customer",
"query": {
"match": {
"customer.fullName": "sdjhfb"
}
}
}
}
]
}
}
}