Mongoose populate nested array with aggregate - database

Question

I'm learning mongoose and I'm trying to populate everything from the account schema with the aggregate function.
I'm getting some trouble when I'm trying to populate the fields $account.sessions.trades.closes.timeframe and $account.sessions.trades.tag. The goal of the query is to get something like this
[
{ // trade 1
name : "account-name",
session : {name : "session-name"},
trade : {
symbol : {...},
open : {....},
closes : {
gain : "12",
timeframe : {time : 12, unit : "min"}
},
tags : [
{name: "tag-name-1"},
{name: "tag-name-2"}
],
}
},
{ // trade 2
...
},
{ // trade 3
...
}
]
Account
const accountSchema = new Schema({
name : { type : String, required: true},
sessions : [{
type : Schema.Types.ObjectId,
ref : "Session_Model"
}],
});
Session
const sessionSchema = new Schema({
name : {type : String},
trades : [{
type : Schema.Types.ObjectId,
ref : "Trade_Model"
}],
});
Trade
var operationSchema = new Schema({
gain : { type: Number },
timeframe : { type: Schema.Types.ObjectId, ref : "Timeframe_Model"},
});
const tradeSchema = new Schema({
symbol : { type: Schema.Types.ObjectId, ref : "Symbol_Model"},
open : operationSchema,
closes : [operationSchema],
tags : [{type: Schema.Types.ObjectId, ref : "Tag_Model"}],
});
Timeframe
const timeframeSchema = new Schema({
time : { type: Number, required: true },
unit : { type: String, required: true },
});
Aggregate query
Account_Model.aggregate(
[
{$lookup : {
from : "session_models",
localField : "sessions",
foreignField : "_id",
as : "populate_sessions"
}},
{$lookup : {
from : "trade_models",
localField : "populate_sessions.trades",
foreignField : "_id",
as : "trade"
}},
{$unwind : "$trade"},
{$sort : {"trade.open.date" : 1}},
{$skip : Number(req.params.limit) * (Number(req.params.page)-1)},
{$limit : Number(req.params.limit)},
{$lookup : {
from : "symbol_models",
localField : "trade.symbol",
foreignField : "_id",
as : "trade.symbol"
}},
{$unwind : { path : "$trade.symbol"}},
{$lookup : {
from : "timeframe_models",
localField : "trade.open.timeframe",
foreignField : "_id",
as : "trade.open.timeframe"
}},
{$unwind : { path : "$trade.open.timeframe"}},
{$lookup : {
from : "session_models",
localField : "trade.session_id",
foreignField : "_id",
as : "session"
}},
{$unwind : { path : "$session"}},
{$match : {}},
{$project : {
"name" : 1,
"trade" : 1,
"session.name" : 1,
}
}
]
).then(accounts => { ... })
Thanks for your help.