Nested query returns no result when nested object has the same field name as parent

[agliznetsov]

1. create index with nested mappings:

{
"mappings": {
"movie": {
"properties": {
"cast": {
"type": "nested"
}
}
}
}
}

1. post a document:

{
"title": "The Matrix",
"cast": [
{
"title": "test"
}
]
}

1. search nested:

{
"query": {
"filtered": {
"query": {
"match_all": {}
},
"filter": {
"nested": {
"path": "cast",
"filter": {
"term": {
"title": "test"
}
}
}
}
}
}
}

no result found -> bug

It works if nested object uses different field name rather then 'title'

[rjernst]

I don't think this has anything to do with the field names being the same, since the type of both are string. I believe this is related to #8872. Can you change your term query to use cast.title as the field and see if it works?

[agliznetsov]

Indeed it works with "cast.title". Does it mean that a full path must be used in the term despite the fact that there's also a path specified one level higher?

[clintongormley]

@agliznetsov yes that is the case with nested clauses. In fact, in 2.0 it will be the case for ALL fields. See #8070