Nested object retrieval in ElasticSearch query - elasticsearch

Question

I'm new in ElasticSearch and I have a few questions regarding nested object retrieval when a specific condition is matched.
I have a tree-like structure as follow:
{
"id": 4,
"sora": [
{
"pContext": {
"context": {
"sT": "D3",
"uT": "ST"
},
"entities": [
{
"name": "premium",
"bName": "premium",
"fT": "site",
"eT": "F_P",
"children": [
{
"name": "capa",
"bName": "capa",
"fT": "site",
"eT": "FFT",
"children": []
},
{
"name": "code",
"bName": "Codes",
"fT": "site",
"eT": "FFT",
"children": []
},
{
"name": "selection A",
"fT": "site",
"eT": "SELECTION_A",
"children": [
{
"name": "A1",
"fT": "site",
"eT": "ADD",
"children": []
},
{
"name": "A2",
"fT": "site",
"eT": "ADD",
"children": []
}
]
}
]
}
]
}
},
{
"pContext": {
"context": {
"sT": "D2",
"uT": "ST"
},
"entities": [
{
"name": "112",
"bName": "112",
"eT": "D_TYPE",
"children": []
}
]
}
}
]
}
My structure can have more levels.
I have many documents as described above. In order to filter my document I can use the simple query sintax:
{
"_source": {
"excludes": [
"*.context"
]
},
"query": {
"bool": {
"must": [
{
"match": {
"sora.pContext.context.sT": "D3"
},
"match": {
"sora.pContext.entities.name": "premium"
},
"match": {
"sora.pContext.entities.fT": "site"
}
}
]
}
}
}
What I would like to know is, how can I get the nested object that
matches my query and their children. I need the object that matched
the must inclusive filter. Is that possible?
How can I search for a field without specifing the path?
Thanks
# EDIT
My mapping:
{
"mappings": {
"abc": {
"properties": {
"id": {
"type": "integer"
},
"sora": {
"type": "nested",
"properties": {
"pContext": {
"type": "nested",
"properties": {
"context": {
"type": "nested",
"properties": {
"sT": {
"type": "text"
},
"uT": {
"type": "text"
}
}
},
"entities": {
"type": "nested",
"properties": {
"name": {
"type": "text"
},
"bName": {
"type": "text"
},
"fT": {
"type": "text"
},
"eT": {
"type": "text"
},
"children": {
"type": "object"
}
}
}
}
}
}
}
}
}
}
}

Answer 1

Yes you can get the matching objects by using inner_hits along with nested query and not the one you added to the question.
Your query will look as below:
{
"_source": {
"excludes": [
"*.context"
]
},
"query": {
"bool": {
"filter": [
{
"nested": {
"inner_hits": {},
"path": "sora.pContext",
"query": {
"bool": {
"must": [
{
"nested": {
"path": "sora.pContext.context",
"query": {
"bool": {
"must": [
{
"match": {
"sora.pContext.context.sT": "D3"
}
}
]
}
}
}
},
{
"nested": {
"path": "sora.pContext.entities",
"query": {
"bool": {
"must": [
{
"match": {
"sora.pContext.entities.name": "premium"
}
},
{
"match": {
"sora.pContext.entities.fT": "site"
}
}
]
}
}
}
}
]
}
}
}
}
]
}
}
}
I have added link to inner_hits documentation where you can understand how the results will look like.

Answer 2

Well, if someone else is facing the same issue my solution was added all child in the same path/level as the parent but keep the mapping with parent and their children. With that, I'm able to search and retrieve the parts of the parent as wanted.