how to retrieve the child of the parent in n1ql query - couchbase

Question

I am planning to retrieve the child elements of the parent based on some condition. How can i retrieve it, being inside the array of array objects.
SELECT ARRAY {s.name,s.id} FOR s IN t.countryDetails.stateInfo END AS stateDetails
FROM test AS t
WHERE t.type = "countries" and t.countryDetails.name = 'US';
this is the actual json document i am trying to query:
{
"type":"countries",
"docName":"CountryData",
"countryDetails":[
{
"name":"US",
"code":"+1",
"stateInfo":[
{
"name":"Florida",
"id":"1212"
},
{
"name":"NewYork",
"id":"1214"
}
]
},
{
"name":"France",
"code":"+33",
"stateInfo":[
{
"name":"Grand Est",
"id":"5212"
},
{
"name":"Brittany",
"id":"5214"
}
]
}
]
}
I am expecting the following output to bring out the country state details of US only:
[
{
"name":"Florida",
"id":"1212"
},
{
"name":"NewYork",
"id":"1214"
}
]

Answer 1

If you your ConutryDetails has single entry per country use the following
SELECT FIRST s.stateInfo FOR IN t.countryDetails WHEN s.name = "US" END AS stateDetails
FROM test AS t
WHERE t.type = "countries"
AND ANY v IN t.countryDetails SATISFIES v.name = 'US' END;
OR
SELECT cd.stateInfo AS stateDetails
FROM test AS t
UNNEST t.countryDetails AS cd
WHERE t.type = "countries" AND cd.name = 'US';