ElasticSearch: Complex filter by nested document - elasticsearch

Question

I have following document structure:
{
product_name: "Product1",
product_id: 1,
...,
articles: [
{
article_name: 'Article 101',
id: 101,
some_param: 10,
clients: []
},
{
article_name: 'Article 102',
id: 102,
some_param: 11,
clients: [
{
client_id: 10001,
client_name: "some client 1001"
}
...
]
}
]
},
{
product_name: "Product2",
product_id: 2,
...,
articles: [
{
article_name: 'Article 101',
id: 101,
some_param: 10,
clients: []
},
{
article_name: 'Article 102',
id: 102,
some_param: 10,
clients: [
{
client_id: 10001,
client_name: "some client 1001"
}
...
]
}
]
}
I need to get documents (product) ONLY if some of its articles match 2 conditions (single article should match both conditions): articles.some_param = 10 AND articles.clients.client_id = 10001
So I need to get only product with id 2.
I'm using this query now, which is incorrect (and I know why), because it fetches both documents:
{
"query": {
"bool": {
"filter": [
{
"term": {
"articles.clients.id": 10001
}
},
{
"terms": {
"articles.some_param": 10
}
}
]
}
}
}
How can I write query which gets only products which has at least 1 article which matches both conditions: articles.some_param = 10 AND articles.clients.client_id = 10001
e.g., to get Product with ID 2 only?

Answer 1

Something like this:
{
"query": {
"nested": {
"path": "articles",
"query": {
"bool": {
"must": [
{
"term": {
"articles.some_param": {
"value": 10
}
}
},
{
"nested": {
"path": "articles.clients",
"query": {
"term": {
"articles.clients.id":{
"value": 10001
}
}
}
}
}
]
}
}
}
}
}
UPDATE:
Try wrap second query to bool.
{
"query": {
"nested": {
"path": "articles",
"query": {
"bool": {
"must": [
{
"term": {
"articles.some_param": {
"value": 10
}
}
},
{
"bool":{
"must" : [
{
"nested": {
"path": "articles.clients",
"query": {
"term": {
"articles.clients.id":{
"value": 10001
}
}
}
}
}
]
}
}
]
}
}
}
}
}
p.s. I could be mistaken with a path on the second nested query. Just couldn't check. So you can play around with the path on the second query.
p.p.s. The filter is not the query what you need. It does not calculate the scores