Customize JSON retrieved from mysql - mysql

Question

Lets say this is my database table
id ProductID color size
1 abc red L
2 abc green M
3 abc yellow S
4 def purple L
5 def brown M
6 def pink S
Now I am fecthing data using my sql queires but in response i want my json in this structure
{
"status": true,
"message": "All Product Logs has been fetched Successfully",
"products": [
{
"id": "1",
"ProductID": "abc",
"colors": [
"red",
"green",
"yellow",
],
"sizes": [
"L",
"M",
"S",
]
},
{
"id": "2",
"ProductID": "def",
"colors": [
"purple",
"brown",
"pink",
],
"sizes": [
"L",
"M",
"S",
]
}
]
}
And this what i do but it doesn't makes sense
if ($response) {
$JSONDataArray=[];
$ColorDataArray=[];
$SizeDataArray=[];
while($row = mysqli_fetch_array($response)){
$ColorDataArray[]=array($row['color']);
$SizeDataArray[]=array($row['size']);
$JSONDataArray[]=array('productid' =>$row['productid'],'color' => $ColorDataArray,'sizes' => $SizeDataArray);
}
echo json_encode(['status'=>true,'message'=>'All Products has been fetched Successfully','products'=>$JSONDataArray]);
}
Anykind of help would be appreciated. What do u think should i change my database structure or should i change my query. I simply user Select * query without any where clause

Answer 1

One option is to use the JSON_ARRAYAGG function:
SELECT JSON_PRETTY(
CONCAT(
'{"status": true, ',
'"message": "All Product Logs has been fetched Successfully", ',
'"products": [',
(
SELECT
GROUP_CONCAT(`der`.`json`)
FROM (
SELECT
JSON_OBJECT(
'ProductID', `ProductID`,
'colors', JSON_ARRAYAGG(`color`),
'sizes', JSON_ARRAYAGG(`size`)
) `json`
FROM
`tbl`
GROUP BY
`ProductID`
) `der`
),
']}'
)
) `json_response`;
See dbfiddle.
Keep in mind: GROUP_CONCAT: The result is truncated to the maximum length that is given by the group_concat_max_len system variable.