how to get Parent-document only in Couchbase [closed] - couchbase

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how can get Parent-document result using couchbase N1ql query
{
"created_at": "2020-03-26T15:50:12.318Z",
"created_by": 1,
"deleted_at": "",
"frm21_submit": null,
"id": "6cb51519-7c6b-499d-8a8d-3c85658605fc",
"machine_category_id": [
"7a2eb767-faca-4762-b65b-2db9e1992c82",
"259a4bcc-feb5-4d98-88c5-b331316e19be"
],
"main_parts": [
{
"data": {
"deleted_at": "777",
"frm21_submit": null,
"manufacturing_date": "03/31/2020",
"model": "234234234",
"photo": null,
"serial_number": "324324234",
"updated_at": "2020-03-31T14:11:48.909Z"
},
"id": "66354d7c-4769-4f3b-914e-bb841191e323"
}
]
}
i want to desire to result only parent-document only field are all dynamic i can not selected field.
{
"created_at": "2020-03-26T15:50:12.318Z",
"created_by": 1,
"deleted_at": "",
"frm21_submit": null,
"id": "6cb51519-7c6b-499d-8a8d-3c85658605fc",
"machine_category_id": [
"7a2eb767-faca-4762-b65b-2db9e1992c82",
"259a4bcc-feb5-4d98-88c5-b331316e19be"
]
}

Answer 1

If you want only remove main_parts from the original document.
Option 1: Select the fields you want. You mentioned this is not possible.
Option 2: SELECT all fields in the document
and project MISSING as the field you don't want
SELECT d.*, MISSING AS main_parts
FROM default AS d;
Option 3: Remove from the field from the object, if required do cascade using object functions https://docs.couchbase.com/server/current/n1ql/n1ql-language-reference/objectfun.html#object_remove
SELECT OBJECT_REMOVE(d,"main_parts").*
FROM default AS d;
Option 4: If you need to remove lot of fields use reconstruct object
SELECT OBJECT v.name:v.val FOR v IN OBJECT_PAIRS(d) WHEN v.name NOT IN ["main_parts"] END.*
FROM default AS d;
Option 5: If you need to remove if field is object
SELECT OBJECT v.name:v.val FOR v IN OBJECT_PAIRS(d) WHEN v.val IS NULL OR ISOBJECT(v.val) = false END.*
FROM default AS d;
Option 6: Based on value type
SELECT OBJECT v.name:v.val
FOR v IN OBJECT_PAIRS(d)
WHEN type(v.val) IN ["null", "boolean", "number", "string", "array", "object"]
END.*
FROM default AS d;