MongoDB, How can I update multiple values with condition - mongodb

Question

I using Express in Mongoose,
Result would be like this,,
Consider initial count is 0
var arr = [0,0,0,1,1,1,2,3,4,5,6,7,8,9]
{
_id: '1234'
inventory: [
{
itemIndex: 0,
count: 3 // increate 3 times, since it included upper array
},
{
itemIndex: 1,
count: 3 // Increase 3 times this, since it included upper array
},
{
itemIndex: 5,
count: 1 // Increase 1 , since it included upper array
},
{
itemIndex: 10,
count: 0
},
{
itemIndex: 11,
count: 0
},
]
}
** Result would be
enter code here
I tried this code, but I don't know what should I do.
var filter = { _id: id }
await User.updateOne(filter, {
$inc: {
clubInventories: {
itemIndex: ...... ??
}
}
},
Should I use updateMany instead of updateOne?
Please Help.

Answer 1

You can use arrayFitlers,
elem is a user defined identifier, you can put condition on array field and use that identifier in update part using $[<identifier>] positional operator.
var filter = { _id: id };
var arr = [0,1,2,3,4,5,6,7,8,9];
await User.updateOne(filter,
{
$inc: { "inventory.$[elem].count": 1 }
},
{
arrayFilters: [
{ "elem.itemIndex": { $in: arr } }
]
}
)
To update different count value in different index then use,
var filter = { _id: id };
var arr = [1,2,3,4,5,6,7,8,9];
var arr1 = [0];
await User.updateOne(filter,
{
$inc: {
"inventory.$[elem].count": 1,
"inventory.$[elem1].count": 5
}
},
{
arrayFilters: [
{ "elem.itemIndex": { $in: arr } },
{ "elem1.itemIndex": { $in: arr1 } }
]
}
)