How to iterate over a JSON object in a transaction for multiple inserts in database using pg-promise - pg-promise

Question

Apologies if my title might not be clear, I'll explain the question further here.
What I would like to do is to have multiple inserts based on a JSON array that I (backend) will be receiving from the frontend. The JSON object has the following data:
//Sample JSON
{
// Some other data here to insert
...
"quests": {
[
{
"player_id": [1, 2, 3],
"task_id": [11, 12],
},
{
"player_id": [4, 5, 6],
"task_id": [13, 14, 15],
}
]
}
Based on this JSON, this is my expected output upon being inserted in Table quests and processed by the backend:
//quests table (Output)
----------------------------
id | player_id | task_id |
----------------------------
1 | 1 | 11 |
2 | 1 | 12 |
3 | 2 | 11 |
4 | 2 | 12 |
5 | 3 | 11 |
6 | 3 | 12 |
7 | 4 | 13 |
8 | 4 | 14 |
9 | 4 | 15 |
10| 5 | 13 |
11| 5 | 14 |
12| 5 | 15 |
13| 6 | 13 |
14| 6 | 14 |
15| 6 | 15 |
// Not sure if useful info, but I will be using the player_id as a join later on.
-- My current progress --
What I currently have (and tried) is to do multiple inserts by iterating each JSON object.
//The previous JSON response I accept:
{
"quests: {
[
{
"player_id": 1,
"task_id": 11
},
{
"player_id": 1,
"task_id": 12
},
{
"player_id": 6,
"task_id": 15
}
]
}
}
// My current backend code
db.tx(async t => {
const q1 // some queries
....
const q3 = await t.none(
`INSERT INTO quests (
player_id, task_id)
SELECT player_id, task_id FROM
json_to_recordset($1::json)
AS x(player_id int, tasl_id int)`,[
JSON.stringify(quests)
]);
return t.batch([q1, q2, q3]);
}).then(data => {
// Success
}).catch(error => {
// Fail
});
});
It works, but I think it's not good to have a long request body, which is why I'm wondering if it's possible to run iteration of the arrays inside the object.
If there are information needed, I'll edit again this post.
Thank you advance!