Is it possible to add data in Elastic Search from a filter? - elasticsearch

Question

I have an API backed by Elastic Search. Depending on login/password automatically a diferent filter is applied.
Elastic search index contains:
"organisation.id"
"organisation.name"
"organisation.country"
"shop.id"
"shop.name"
"shop.address"
"creationdatetime"
This would be a sample filter:
{
"_source":{
"includes":[
"organisation.id",
"organisation.name",
"shop.id",
"shop.name"
"creationdatetime"
],
"excludes": [
"shop.address",
"organisation.country"
]
},
"from":"0",
"size":"500",
"sort":{"creationdatetime":"asc"},
"query":{
"bool":{
"must":{
"match":{
"shop.sharedwith":"client1"
}
},
"filter":{
"range":{
"creationdatetime":{
"gte":"2020-01-01"
}
}
}
}
}
}
Output would be
{
"total": 2,
"from": "0",
"size": "10",
"hops": [
{
"organisation": [
{
"name": "A1",
"id": "0001-A1"
}
],
"shop": [
{
"name": "A1Shop",
"id": "0001-0001-A1"
}
]
}
]
}
I would like to add a "version" and "filtername" to the output... coming from the filter itself.
Exactly this:
{
"total": 2,
"from": "0",
"size": "10",
"version": "1.0.0.0", // -------------------------------NEW FIELD
"filtername": "filter01", // -------------------------------NEW FIELD
"hops": [
{
"organisation": [
{
"name": "A1",
"id": "0001-A1"
}
],
"shop": [
{
"name": "A1Shop",
"id": "0001-0001-A1"
}
]
}
]
}
Is it possible to add those two extra outputs from the filter itself?

Answer 1

This is not directly possible but there's a workaround using a top_hits aggregation in combination with agg metadata:
GET _search
{
"size": 0, // no need for the standard hits b/c of our `top_hits`
"query": {
"match_all": {} // your actual query
},
"aggs": {
"my_hits": {
"top_hits": {
"size": 10,
"_source": {
"includes": [
"organisation.id",
"organisation.name",
"shop.id",
"shop.name",
"creationdatetime"
],
"excludes": [
"shop.address",
"organisation.country"
]
}
},
"meta": { // custom key-value pairs
"version": "1.0.0.0",
"filtername": "filter01"
}
}
}
}
resulting in
{
...
"aggregations": {
"my_hits": {
"meta": {
"version": "1.0.0.0",
"filtername": "filter01"
},
"hits": {
... // the actual docs
}
}
}
}
It's also worth looking at named queries although their use here is very loosely applicable.