How to query Couchbase using Java API - couchbase

Question

I'm trying to query from the Couchbase example beer-sample.
This query works fine in the Couchbase browser UI:
select category, style from `beer-sample` where style like 'Imperial%'
Results:
[
{
"category": "North American Ale",
"style": "Imperial or Double India Pale Ale"
},
...
]
But when I transplant the query into java, I get very peculiar results. (Yes, I know I'm opening/closing connection in the wrong place, just doing this for quick exploration of Couchbase syntax/features).
Java code:
#RequestMapping("/hellocouchbase")
public ResponseEntity<List<JsonObject>> metrics() {
Cluster cluster = CouchbaseCluster.create();
cluster.authenticate(username, passwd);
Bucket bucket = cluster.openBucket("beer-sample");
N1qlQueryResult result = bucket.query(N1qlQuery.simple("select category, style from `beer-sample` where style like 'Imperial%'"));
List<N1qlQueryRow> results = result.allRows();
List<JsonObject> answer = new ArrayList<>(results.size());
for(N1qlQueryRow row:results) {
answer.add(row.value());
}
cluster.disconnect();
return ResponseEntity.status(200).body(answer);
}
Results:
[
{"cryptoManager":null,"empty":false,"names":["style","category"]},{"cryptoManager":null,"empty":false,"names":["style","category"]},
...
]
Can someone explain how to make the java query produce the same results as the direct query?

Answer 1

Try to create a new user and add all privileges to it (just to be sure that you are not hitting any security restriction).
Your code works for me:
Cluster cluster = CouchbaseCluster.create();
cluster.authenticate("test", "couchbase"); //user and password that I created
Bucket bucket = cluster.openBucket("beer-sample");
N1qlQueryResult result = bucket.query(N1qlQuery.simple("select category, style from `beer-sample` where style like 'Imperial%'"));
List<N1qlQueryRow> results = result.allRows();
List<JsonObject> answer = new ArrayList<>(results.size());
for(N1qlQueryRow row:results) {
answer.add(row.value());
System.out.println(row);
}
cluster.disconnect();
Output:
{"category":"North American Ale","style":"Imperial or Double India Pale Ale"}
{"category":"North American Ale","style":"Imperial or Double India Pale Ale"}
{"category":"North American Ale","style":"Imperial or Double India Pale Ale"}
{"category":"North American Ale","style":"Imperial or Double India Pale Ale"}
{"category":"North American Ale","style":"Imperial or Double India Pale Ale"}
{"category":"North American Ale","style":"Imperial or Double India Pale Ale"}
{"category":"North American Ale","style":"Imperial or Double India Pale Ale"}
{"category":"North American Ale","style":"Imperial or Double India Pale Ale"}
...
{"category":"North American Ale","style":"Imperial or Double India Pale Ale"}
{"category":"North American Ale","style":"Imperial or Double India Pale Ale"}
{"category":"North American Ale","style":"Imperial or Double India Pale Ale"}
{"category":"North American Ale","style":"Imperial or Double India Pale Ale"}
{"category":"North American Ale","style":"Imperial or Double India Pale Ale"}
{"category":"North American Ale","style":"Imperial or Double India Pale Ale"}
{"category":"North American Ale","style":"Imperial or Double Red Ale"}
{"category":"North American Ale","style":"Imperial or Double India Pale Ale"}
{"category":"North American Ale","style":"Imperial or Double India Pale Ale"}
{"category":"North American Ale","style":"Imperial or Double India Pale Ale"}
{"category":"North American Ale","style":"Imperial or Double India Pale Ale"}

Answer 2

For some reason, changing this
answer.add(row.value());
to this
answer.add(row.value().toMap());
fixed it for me. No idea why, given that the original version apparently works fine for other people here.
Complete solution for reference:
#RequestMapping("/hellocouchbase")
public ResponseEntity<List<Map<String,Object>>> metrics() {
Cluster cluster = CouchbaseCluster.create();
cluster.authenticate(username, passwd);
Bucket bucket = cluster.openBucket("beer-sample");
N1qlQueryResult result = bucket.query(N1qlQuery.simple("select category, style from `beer-sample` where style like 'Imperial%'"));
List<N1qlQueryRow> results = result.allRows();
List<Map<String,Object>> answer = new ArrayList<>(results.size());
for(N1qlQueryRow row:results) {
answer.add(row.value().toMap());
}
cluster.disconnect();
return ResponseEntity.status(200).body(answer);
}