Update double nested emedded documents in mongodb nodejs without using number index - node.js

Question

I want to update Itinirary which is embedded subdocument inside the
packages which itself is a embedded document.I tried using index and
was successful like this :
"$set":{'packages.$.itinerary.0.to': "kausaltar"}
but I don't want to use index like 0,1 in itinerary update.Please can you help me.
My JSON schema is like this :
{
"_id" : ObjectId("5e1ca76b9f96d17c449de177"),
"org_id" : "22222222222",
"packages" : [
{
"_id" : ObjectId("5e1ca76b9f96d17c449de17a"),
"region" : "ppopopop",
"itinerary" : [
{
"_id" : ObjectId("5e1ca76b9f96d17c449de17d"),
"id" : 1,
"from" : "ppopopop",
"to" : "ashinnkn",
"mode" : "4444444444",
"day" : 2,
"duration_hrs" : 3
},
{
"_id" : ObjectId("5e1ca76b9f96d17c449de17c"),
"id" : 2,
"from" : "44444444444",
"to" : "Faketon2",
"mode" : "4444444444",
"day" : 2,
"duration_hrs" : 3
},
{
"_id" : ObjectId("5e1ca76b9f96d17c449de17b"),
"id" : 3,
"from" : "55555555555",
"to" : "ashin",
"mode" : "55555555",
"day" : 2,
"duration_hrs" : 3
}
],
"image_url" : "sadfasfsa",
},
{
"_id" : ObjectId("5e1ca76b9f96d17c449de178"),
"region" : "bktll",
"itinerary" : [
{
"_id" : ObjectId("5e1ca76b9f96d17c449de179"),
"id" : 1,
"from" : "mmkkkkm",
"to" : "ashin",
"mode" : "SkkkkA",
"day" : 2,
"duration_hrs" : 3
}
],
"image_url" : "sadfasfsa",
}
]
}
}
I want to update itinerary field inside packages which itself is an embedded document.
And my code is like this :
AgentPackage.update({
"_id" : mongoose.Types.ObjectId("5e1ca76b9f96d17c449de177"),
"packages.region" : "ppopopop",
'packages.itinerary.id': 2,
}, {$set: {'packages.itinerary.$$.from': "test" }}
I am not being able to update.I don't want to use indexing like 0,1 INSIDE query.

Answer 1

Try this :
If you've only one object inside packages with region : "ppopopop", then try this (this should suffice in most cases as you might not have duplicate regions with same name) :
AgentPackage.update({
_id: ObjectId("5e1ca76b9f96d17c449de177"), "packages.region": "ppopopop"
}, { $set: { "packages.$.itinerary.$[item].to": 'kausaltar' } }, {
arrayFilters: [{ 'item.id': 2 }]
})
If you've got multiple objects inside packages with region : "ppopopop", then try this :
AgentPackage.update({
_id: ObjectId("5e1ca76b9f96d17c449de177"), "packages.region": "ppopopop" // Here this "packages.region": "ppopopop" is optional as _id will only bring one document else might be helpful to bring only docs with region: ppopopop right after filter.
}, { $set: { "packages.$[eachPackage].itinerary.$[eachItinerary].to": 'kausaltar' } }, {
arrayFilters: [{ 'eachPackage.region': "ppopopop" }, { 'eachItinerary.id': 2 }]
})
Ref : update-positional-filtered

Answer 2

You can do it with $arrayfilter
db.getCollection("unit").update({_id: ObjectId("5e1ca76b9f96d17c449de177")}, { $set: { "packages.$[t].itinerary.$[d].from": "test" } },
{ arrayFilters: [ { "t.region": "ppopopop" }, {"d.id":15}]})