update mongodb field by an array object property - node.js

Question

i am trying to carry a simple update query operation with MongoDB from my node js application that will run every night using node-cron but i haven't been able to get the update operation to work
.documents in my db look like
[
{
Balance: 4000,
name: "Steph curry",
password: "*****",
created_At: ISODate("2022-04-19T07:17:29.243Z"),
deposits: [
{
amount: 1000,
paid: false,
expiry: 28903708478, // this should be a timestamp
credit: 150
},
{
amount: 1000,
paid: false,
credit: 100,
expiry: 28903708478 // this should be a timestamp
}
]
}
]
i want to query for all users where their deposit has expired (that is Date.now() > expiry )
and their paid value is false and then add the credit to their balance value, then turn the paid value to true.
/ basically what i want is something like this
db.collection.update({
"deposits.paid": false,
"deposits.expiry": { $lt: "$$NOW" }
},
{
ballance: {
$add: [ "deposits.$.credit", "$balance" ]
},
"deposits.$.paid": true
})

Answer 1

I don't think your expiry is a valid timestamp (28903708478=2885/12/2 Sunday 15:54:38), so convert it yourself.
$map
$add
$cond
$mergeObjects
db.collection.update({
"deposits.paid": false,
"deposits.expiry": { $lt: 28903708479 }
},
[
{
$set: {
Balance: {
$add: [
"$Balance",
{
$sum: {
$map: {
input: "$deposits",
as: "d",
in: {
$cond: {
if: {
$and: [
{ $not: "$$d.paid" },
{ $lt: [ "$d.expiry", 28903708479 ] }
]
},
then: "$$d.credit",
else: 0
}
}
}
}
}
]
}
}
},
{
$set: {
deposits: {
$map: {
input: "$deposits",
as: "d",
in: {
$mergeObjects: [
"$$d",
{
paid: {
$cond: {
if: {
$and: [
{ $not: "$$d.paid" },
{ $lt: [ "$d.expiry", 28903708479 ] }
]
},
then: true,
else: false
}
}
}
]
}
}
}
}
}
],
{
multi: true
})
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