Mongo DB query nested filter - mongodb

Question

I have this Mongo DB document structure...
{
"_id": {
"$oid": "63b6e12d650c56ca2e720c86"
},
"userName": "Harshit Gupta ",
"email": "harshitguptapositive#gmail.com",
"password": "$2b$10$Ys0AfxbtQKX3XytM1n85dO0dUL2bFAMQiD3w5nSw6zFmda4W4yRn6",
"tasks": [
{
"habbitName": "Jogging",
"Description": "defended",
"Sunday": false,
"Monday": true,
"Tuesday": false,
"Wednesday": true,
"Thursday": false,
"Friday": true,
"Saturday": false,
"Month": [
{
"date": 0,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720c8d"
}
},
{
"date": 1,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720c8e"
}
},
{
"date": 2,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720c8f"
}
},
{
"date": 3,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720c90"
}
},
{
"date": 4,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720c91"
}
},
{
"date": 5,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720c92"
}
},
{
"date": 6,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720c93"
}
},
{
"date": 7,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720c94"
}
},
{
"date": 8,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720c95"
}
},
{
"date": 9,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720c96"
}
},
{
"date": 10,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720c97"
}
},
{
"date": 11,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720c98"
}
},
{
"date": 12,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720c99"
}
},
{
"date": 13,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720c9a"
}
},
{
"date": 14,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720c9b"
}
},
{
"date": 15,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720c9c"
}
},
{
"date": 16,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720c9d"
}
},
{
"date": 17,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720c9e"
}
},
{
"date": 18,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720c9f"
}
},
{
"date": 19,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720ca0"
}
},
{
"date": 20,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720ca1"
}
},
{
"date": 21,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720ca2"
}
},
{
"date": 22,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720ca3"
}
},
{
"date": 23,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720ca4"
}
},
{
"date": 24,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720ca5"
}
},
{
"date": 25,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720ca6"
}
},
{
"date": 26,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720ca7"
}
},
{
"date": 27,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720ca8"
}
},
{
"date": 28,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720ca9"
}
},
{
"date": 29,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720caa"
}
},
{
"date": 30,
"done": false,
"_id": {
"$oid": "63b6e14c650c56ca2e720cab"
}
}
],
"timeRemind": "23:12",
"_id": {
"$oid": "63b6e14c650c56ca2e720c8c"
},
"createdAt": {
"$date": {
"$numberLong": "1672929612245"
}
},
"updatedAt": {
"$date": {
"$numberLong": "1672929612245"
}
}
}
}
],
"createdAt": {
"$date": {
"$numberLong": "1672929581689"
}
},
"updatedAt": {
"$date": {
"$numberLong": "1672939914562"
}
},
"__v": 2
}
I want to first select user id then specific the task id and the document which gets selected then
I want to update specific date of the month field can you please suggest the specific query..
first select select user by user id then a task by task id then in Month field i want to update a n element(done attribute to true) whose date is 4.
I tried to apply the following operation.
let doc = await User.findOneAndUpdate({
_id: req.user.id
}
,{
"tasks.$[task].Month.$[dateIndex].done": true
},{
arrayFilters:[ {"dateIndex.date" : 4} ,{"task.id":req.params.taskId}]
}
);

Answer 1

The positional parameter $ only matches the first element of the top-most array.
To update within an object in an array nested in another array, use arrayFilters and the $[] positional filter to refer into the nested arrays, like:
User.findOneAndUpdate({
_id: mongoose.Types.ObjectId(req.user.id),
"tasks._id": mongoose.Types.ObjectId(req.params.taskId)
},
{$set: {"tasks.$.Month.$[m].done": true}},
{
arrayFilters: [{"m.date": dateIndice}]
})
Playground