Elastic search: Nested query with and condition on parent and child - elasticsearch

Question

I have 2 sample record like below:
{
"parents": [
{
"child": [
{
"is_deleted": false,
"child_id": -1,
"timestamp": 1483536052232
}
],
"parent_id": 810
},
{
"child": [
{
"is_deleted": true,
"child_id": 105,
"timestamp": 1483537567000
}
],
"parent_id": 42
}
]
},
{
"parents": [
{
"child": [
{
"is_deleted": false,
"child_id": 105,
"timestamp": 1483537567000
}
],
"parent_id": 42
}
]
}
and my mapping:
"properties": {
"parents": {
"type": "nested",
"properties": {
"parent_id": {
"type": "integer",
"doc_values": false
},
"child": {
"type": "nested",
"properties": {
"is_deleted": {
"type": "boolean",
"doc_values": false
},
"child_id": {
"type": "integer",
"doc_values": false
},
"timestamp": {
"type": "long",
"doc_values": false
}
}
}
}
}
I want to search by parent ID which has at least one child with is_deleted as false. For example if i will query with parent ID 42, i should get only 2nd document not first.

Answer 1

You should use nested query to query nested field.
Here is an example, but I don't know if this is the best solution at least it is a working one:
POST /test1/test/_search
{
"query": {
"nested": {
"path": "parents",
"query": {
"bool": {
"must": [
{
"match": {
"parents.parent_id": 42
}
},
{
"nested": {
"path": "parents.child",
"query": {
"term": {
"parents.child.is_deleted": "F"
}
}
}
}
]
}
}
}
}
}