Elasticsearch dynamic template to match several exact fields - templates

Question

I'm currently struggling to simplify my mapping template files for Elasticsearch. Indeed, I got several Object fields that have the same structure (e.g. source and destination here)
Is there a way to set up Dynamic template so that it can match several patterns ?
Here's what I execute:
POST /_template/mapping-lol
{
"template": "*-newevents-*",
"mappings": {
"log": {
"dynamic_templates": [
{
"system": {
"match_pattern": "regex",
"match": "^(source|destination)$",
"mapping": {
"properties": {
"name": {
"dynamic": false,
"type": "object",
"properties": {
"first": {
"type": "text"
},
"last": {
"type": "text"
}
}
},
"ip": {
"type": "ip"
}
}
}
}
}
],
"properties": {
"source": {
"type": "object",
"dynamic": true
},
"destination": {
"type": "object",
"dynamic": true
}
}
}
}
}
POST /tenant-newevents-1/log
{
"source": {
"name": {
"first": "John",
"last": "Doe"
},
"ip": "1.2.3.4"
},
"destination": {
"name": {
"first": "Jane",
"last": "Doe"
},
"ip": "3.4.5.6"
}
}
GET /tenant-newevents-1
This above does not work...
I've got plenty of these same schemes to match (~20).
Thank you very much for your help !

Answer 1

OK I found out what went wrong: Fields mustn't be mapped at all for Dynamic mapping to proceed. Removing "source" and "destination" schemes in mapping worked.
POST /_template/mapping-lol
{
"template": "*-newevents-*",
"mappings": {
"log": {
"dynamic_templates": [
{
"system": {
"match_pattern": "regex",
"match": "^(source|destination)$",
"mapping": {
"properties": {
"name": {
"dynamic": false,
"type": "object",
"properties": {
"first": {
"type": "text"
},
"last": {
"type": "text"
}
}
},
"ip": {
"type": "ip"
}
}
}
}
}
],
"properties": {}
}
}
}