query_string filter inside a nested filter throws an error - elasticsearch

Question

In this example I've placed a full query example that's been paired down to the non-working portion that has me stuck.
Basically we have a document that has a nested document type under datailItems and trying to do a query_string filter against a field in that nested document fails. I take the same portion and run it against a non-nested field and it works. So obviously I'm doing something wrong.
The error I receive is nested: QueryParsingException[[******] [_na] filter malformed, must start with start_object]
So, What is the proper way to do this?
Some caveats. The "and"s are used for further filter requirements that contain bools, ranges, etc... I have stripped out those additional reqs for this example.
{
"size" : 1,
"query" : {
"filtered" : {
"filter" : {
"and" : [{
"nested" : {
"path" : "detailItems",
"filter" : {
"and" : [{
"query" : {
"query_string" : {
"detailItems.name" : {
"query" : "mastersettings",
"minimum_should_match" : 1
}
}
}
}
]
}
}
}
]
}
}
}
}

Answer 1

The query_string in the OP is not syntactically correct, below is an example of how the query string could be re-written:
"size" : 1,
"query" : {
"filtered" : {
"filter" : {
"and" : [{
"nested" : {
"path" : "detailItems",
"filter" : {
"and" : [{
"query" : {
"query_string" : {
"fields": [
"detailItems.name"
],
"query" : "mastersettings",
"minimum_should_match" : 1
}
}
}
]
}
}
}
]
}
}
}