MongoDB - join multiple collections - mongodb

Question

I want to join (left) multiple collection:
Step1:
db.user.insertOne({
user_id: "id_user_1",
})
Step2: (add first document to each colection - id_user_1)
db.est_zone.insertOne({
zone: {
temp: "tempo1",
},
user_id: "id_user_1"
})
db.est_tax.insertOne({
tax: {
fam: "fam1",
},
user_id: "id_user_1"
})
Step3: (add second document to each colection - id_user_1)
db.est_zone.insertOne({
zone: {
temp: "tempo2",
},
user_id: "id_user_1"
})
db.est_tax.insertOne({
tax: {
fam: "fam2",
},
user_id: "id_user_1"
})
So, when i use $lookup (aggregate) with just one collection, it work like what i expect:
db.user.aggregate([
{
$match: {
user_id: "id_user_1"
}},
{
$lookup: {
from: "est_zone",
localField: "user_id",
foreignField: "user_id",
as: "est_zone"
}},
{$unwind: "$est_zone"},
])
output:
[
{
"_id": {
"$oid": "63db1a68ef527b03093e78d4"
},
"user_id": "id_user_1",
"est_zone": {
"_id": {
"$oid": "63db1a68ef527b03093e78d5"
},
"zone": {
"temp": "tempo1"
},
"user_id": "id_user_1"
}
},
{
"_id": {
"$oid": "63db1a68ef527b03093e78d4"
},
"user_id": "id_user_1",
"est_zone": {
"_id": {
"$oid": "63db1ad58c3dc65723ce0ac9"
},
"zone": {
"temp": "tempo2"
},
"user_id": "id_user_1"
}
}
]
tempo1 and tempo2 are in one document.
i expect fam1 in tempo1 document
and fam2 in tempo2 document
but, when i use lookup for join the "est_tax" it doesnt works like i want (even if use $unwind):
db.user.aggregate([
{
$match: {
user_id: "id_user_1"
}},
{
$lookup: {
from: "est_zone",
localField: "user_id",
foreignField: "user_id",
as: "est_zone"
}},
{$unwind: "$est_zone"},
{
$lookup: {
from: "est_tax",
localField: "user_id",
foreignField: "user_id",
as: "est_tax"
}},
])
output:
[
{
"_id": {
"$oid": "63db1a68ef527b03093e78d4"
},
"user_id": "id_user_1",
"est_zone": {
"_id": {
"$oid": "63db1a68ef527b03093e78d5"
},
"zone": {
"temp": "tempo1"
},
"user_id": "id_user_1"
},
"est_tax": [
{
"_id": {
"$oid": "63db1a68ef527b03093e78d6"
},
"tax": {
"fam": "fam1"
},
"user_id": "id_user_1"
},
{
"_id": {
"$oid": "63db1ad58c3dc65723ce0aca"
},
"tax": {
"fam": "fam2"
},
"user_id": "id_user_1"
}
]
},
{
"_id": {
"$oid": "63db1a68ef527b03093e78d4"
},
"user_id": "id_user_1",
"est_zone": {
"_id": {
"$oid": "63db1ad58c3dc65723ce0ac9"
},
"zone": {
"temp": "tempo2"
},
"user_id": "id_user_1"
},
"est_tax": [
{
"_id": {
"$oid": "63db1a68ef527b03093e78d6"
},
"tax": {
"fam": "fam1"
},
"user_id": "id_user_1"
},
{
"_id": {
"$oid": "63db1ad58c3dc65723ce0aca"
},
"tax": {
"fam": "fam2"
},
"user_id": "id_user_1"
}
]
}
]
What i expect:
[
{
"_id": {
"$oid": "63db1a68ef527b03093e78d4"
},
"user_id": "id_user_1",
"est_zone": {
"_id": {
"$oid": "63db1a68ef527b03093e78d5"
},
"zone": {
"temp": "tempo1"
},
"user_id": "id_user_1"
},
"est_tax": [
{
"_id": {
"$oid": "63db1a68ef527b03093e78d6"
},
"tax": {
"fam": "fam1"
},
"user_id": "id_user_1"
},
]
},
{
"_id": {
"$oid": "63db1a68ef527b03093e78d4"
},
"user_id": "id_user_1",
"est_zone": {
"_id": {
"$oid": "63db1ad58c3dc65723ce0ac9"
},
"zone": {
"temp": "tempo2"
},
"user_id": "id_user_1"
},
"est_tax": [
{
"_id": {
"$oid": "63db1ad58c3dc65723ce0aca"
},
"tax": {
"fam": "fam2"
},
"user_id": "id_user_1"
}
]
}
]
on the output:
first document must have only tempo1 and fam1
second document mst have only tempo2 and fam2
i new in mongoDB and still thinking like SQL,
I am open to suggestions, i read there's no problem with duplicate data (mb in user, idk)
but, i need to keep separate "est_zone" and "est_tax"
Thx for yout time!