i want group by value and my problem is screen_size and screen_resulation is changeable
is there is something like wildcard in nested document in mongodb ?
i have tried this but its not working
[
{
filters: {
screen_size: {
name: "حجم الشاشة",
value: "50",
},
screen_resulation: {
name: "دقة الشاشة",
value: "4k",
},
},
},
{
filters: {
screen_resulation: {
name: "دقة الشاشة",
value: "UHD",
},
screen_size: {
name: "حجم الشاشة",
value: "55",
},
},
},
{
filters: {
screen_resulation: {
name: "دقة الشاشة",
value: "4k",
},
screen_size: {
name: "حجم الشاشة",
value: "55",
},
},
},
];
{
$group : {
_id: "$filters.*.value", counter: { $sum: 1 }
}
}
You can get the desired result with the below approach as well:
[{$project: {
_id: '$_id',
filters: { $objectToArray: '$filters' }
}}, {$unwind: {
path: '$filters'
}}, {$group: {
_id: '$filters.v.value',
count: {$sum: 1}
}}]