I receive a naked JSON array for changes from the request body like

"event": {
        "date": "2022-06-08",
        "stime": "9:00 am",
        "Status": "confirmed",
        "id": "3a207381-0007-47b7-a4dd-bbbe44afcf18",
    },
    "changes": [
        "date",
        "time"
    ]
}

I want changes to be updated in the JSON column(update_change) in my table.

I am accessing changes in the request body with

var update_change = JSON.stringify(req.body.changes)

and passing to the Postgres query.

  const query = `UPDATE events SET update_change =$1 WHERE id = $2`;
  var values = [update_change,id];

Query receives update_changes is undefined.