Grouping sequelize data in separate objects - node.js

Question

i am new with nodejs express with posgresql , i made a route like this :
get: async (req, res, next) => {
var cat = await sequelize.query(
`
SELECT
o."id" as "cart_id",
o."user_id",
o."createdBy",
o."createdAt",
o."updatedAt",
i."quantity",
pi."name",
pi."price"
FROM "Orders" AS o
Left join public."CartItem" i on i."cart_id"=o."id"
Left join public."Item" pi on pi."id"=i."product_id"
WHERE o."user_id"=${req.body.user_id}
`
,
{ type: QueryTypes.SELECT,group:`i."cart_id"` })
.catch(e => res.send(e))
if (cat) {
// console.log(cat.Orders)
cat.map(e=> {
console.log(e)
})
res.send(cat)
}
},
if i hit this route with postman i get this response :
[
{
"cart_id": 9,
"user_id": 1,
"createdBy": null,
"createdAt": "2022-11-11T09:51:47.968Z",
"updatedAt": "2022-11-11T09:51:47.968Z",
"quantity": 4,
"name": "test1",
"price": 12000
},
{
"cart_id": 9,
"user_id": 1,
"createdBy": null,
"createdAt": "2022-11-11T09:51:47.968Z",
"updatedAt": "2022-11-11T09:51:47.968Z",
"quantity": 4,
"name": "test2",
"price": 12000
}
]
My question is, is it possible to assemble the response in the following way:
[
"cart_9":[
{
"user_id": 1,
"createdBy": null,
"createdAt": "2022-11-11T09:51:47.968Z",
"updatedAt": "2022-11-11T09:51:47.968Z",
"quantity": 4,
"name": "test1",
"price": 12000
},
{
"user_id": 1,
"createdBy": null,
"createdAt": "2022-11-11T09:51:47.968Z",
"updatedAt": "2022-11-11T09:51:47.968Z",
"quantity": 4,
"name": "test2",
"price": 12000
}
]
]
note that the response assembled by the "cart_id" .
any suggestion to assemble the response and get the required response ?