ElasticSearch Query fields based on conditions on another field - elasticsearch

Question

Mapping
PUT /employee
{
"mappings": {
"post": {
"properties": {
"name": {
"type": "keyword"
},
"email_ids": {
"properties":{
"id" : { "type" : "integer"},
"value" : { "type" : "keyword"}
}
},
"primary_email_id":{
"type": "integer"
}
}
}
}
}
Data
POST employee/post/1
{
"name": "John",
"email_ids": [
{
"id" : 1,
"value" : "1#email.com"
},
{
"id" : 2,
"value" : "2#email.com"
}
],
"primary_email_id": 2 // Here 2 refers to the id field of email_ids.id (2#email.com).
}
I need help to form a query to check if an email id is already taken as a primary email?
eg: If I query for 1#email.com I should get result as No as 1#email.com is not a primary email id.
If I query for 2#email.com I should get result as Yes as 2#email.com is a primary email id for John.

Answer 1

As far as i know with this mapping you can not achive what you are expecting.
But, You can create email_ids field as nested type and add one more field like isPrimary and set value of it to true whenever email is primary email.
Index Mapping
PUT employee
{
"mappings": {
"properties": {
"name": {
"type": "keyword"
},
"email_ids": {
"type": "nested",
"properties": {
"id": {
"type": "integer"
},
"value": {
"type": "keyword"
},
"isPrimary":{
"type": "boolean"
}
}
},
"primary_email_id": {
"type": "integer"
}
}
}
}
Sample Document
POST employee/_doc/1
{
"name": "John",
"email_ids": [
{
"id": 1,
"value": "1#email.com"
},
{
"id": 2,
"value": "2#email.com",
"isPrimary": true
}
],
"primary_email_id": 2
}
Query
You need to keep below query as it is and only need to change email address when you want to see if email is primary or not.
POST employee/_search
{
"_source": false,
"query": {
"nested": {
"path": "email_ids",
"query": {
"bool": {
"must": [
{
"term": {
"email_ids.value": {
"value": "2#email.com"
}
}
},
{
"term": {
"email_ids.isPrimary": {
"value": "true"
}
}
}
]
}
}
}
}
}
Result
{
"took" : 2,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 1,
"relation" : "eq"
},
"max_score" : 0.98082924,
"hits" : [
{
"_index" : "employee",
"_type" : "_doc",
"_id" : "1",
"_score" : 0.98082924
}
]
}
}
Interpret Result:
Elasticsearch will not return result in boolean like true or false but you can implement it at application level. You can consider value of hits.total.value from result, if it is 0 then you can consider false otherwise true.
PS: Answer is based on ES version 7.10.