Kibana Vega-Lite use aggregates as data - kibana

Question

I am new with Vega-Lite in Kibana. I am trying to produce a bar chart in Kibana using Vega.
I use Vega because I have to use nested fields, and it seems there are not other options.
I don't want to plot a time series, I want to directly plot aggregates.
This is my script:
{
"$schema": "https://vega.github.io/schema/vega-lite/v5.json",
"title": "Event counts from all indexes",
data: {
name: "aggregations"
url: {
%context%: true
%timefield%: timestamp
index: search-sonarqube-telemetry-2021-merged
body: {
"aggs": {
"languages": {
"terms": { "field": "plugins.name.keyword"}
}
}
size: 0
}
}
format: {property: "aggregations.languages.buckets" }
}
mark: bar
encoding: {
y: {
field: "buckets.key"
type: nominal
axis: { title: null }
}
x: {
field: "buckets.doc_count"
type: quantitative
axis: { title: "Document count" }
}
}
transform: [
{"filter":
{"field": "doc_count", "range": [0,100000]}
}
]
}
Everything is empty.
If I try to debug, I see the source_0, with the correct data I would like to plot, but not the data_0.
I also get the warnings:
Infinite extent for field "buckets.doc_count_start": [Infinity, -Infinity]
Infinite extent for field "buckets.doc_count_end": [Infinity, -Infinity]
What is wrong in my script?
Thanks

Answer 1

I found the problem.
I defined the property as aggregations.languages.buckets, but the I was defined the fields as buckets.key and buckets.doc_count in the encoding.
It was enough to replace key and doc_count to buckets.key and buckets.doc_count and it worked.
Actually it was not finding the fields because inside aggregations.languages.buckets we don't have a repetition of buckets.