Reply head informations and add extract array to same result - json

Question

someone colud please help me with this situation?
I have this fake JSON...
[
{
"user": {
"type": "PF",
"code": 12345,
"Name": "Darth Vader",
"currency": "BRL",
"status": "SINGLE",
"localization": "NABOO",
"createDate": 1627990848665,
"olderAdress": [
{
"localization": "DEATH STAR",
"createDate": 1627990848775
},
{
"localization": "TATOOINE",
"createDate": 1627990555888
},
]
}
}
]
My idea is, i need to extract the "olderAdress" and create new register but I need to keep the original register too.
Example: This is the result I hope.
[
{
"_id": ObjectId("5a3456e000102030405000000"),
"user": {
"Name": "Darth Vader",
"code": 12345,
"createDate":1627990848665,
"currency": "BRL",
"localization": "NABOO",
"status": "SINGLE",
"type": "PF"
}
},
{
"_id": ObjectId("5a789e000102030405000000"),
"user": {
"Name": "Darth Vader",
"code": 12345,
"createDate": 1627990848775,
"currency": "BRL",
"localization": "DEATH STAR",
"status": "SINGLE",
"type": "PF"
}
},
{
"_id": ObjectId("5a991e000102030405000000"),
"user": {
"Name": "Darth Vader",
"code": 12345,
"createDate": 1627990555888,
"currency": "BRL",
"localization": "TATOOINE",
"status": "SINGLE",
"type": "PF"
}
}
]
I try same think in this link (Test to extract values) to tests but unfortunately I cant. Somewoone could please help me?

Answer 1

You're very close, what you want to do is just to add the new location to the array before $unwinding it.
like so:
db.collection.aggregate([
{
"$addFields": {
"user.olderAdress": {
"$concatArrays": [
"$user.olderAdress",
[
{
"localization": "NABOO",
"createDate": "$$NOW"
}
]
]
}
}
},
... rest of pipeline ...
])
Mongo Playground