Include document id on Couchbase Nest right hand side array - couchbase

Question

I have a nest operation that joins an array of ids with some documents.
SELECT left.*,right FROM bucket AS left
LEFT NEST bucket AS right
ON META(right).id IN left.array
Result
[
{
array : ["rightId1","rightId2"],
right : [ { < rightFields1 > }, { < rightFields2 > } ]
}
]
I need the returned documents (< rightFields >) have the id on one of its fields, how can I do this?

Answer 1

META(item).id only works in case item is bucket alias otherwise it returns MISSING.
First 2 are right approach in this case as you have right side document keys.
SELECT left.*,
(SELECT META(r).id, r.*
FROM bucket AS r USE KEYS left.array) AS right
FROM bucket AS left;
OR
SELECT left.*, right
FROM bucket AS left
LET right = (SELECT META(r).id, r.*
FROM bucket AS r USE KEYS left.array);
If you need really process right document and use them as array instead of NEST (for no processing) you should Use JOIN, GROUP BY and ARRAY_AGG()
SELECT left.*,
ARRAY_AGG(OBJECT_ADD(right,"id",META(right).id)) AS right
FROM bucket AS left
LEFT JOIN bucket AS right ON KEYS left.array
GROUP BY left;

Answer 2

I don't know if there is an easier solution, but I solved it by iterating each item of the array with ARRAY, and adding it a new property with OBEJECT_ADD
SELECT left.*,ARRAY OBJECT_ADD(item, "id", META(item).id) FOR item IN right END
FROM bucket AS left
LEFT NEST bucket AS right
ON META(right).id IN left.array