Get all array subdocuments with a conditional in MongoDB - mongodb

Question

I have a collection with lot of documents like this:
{
"Items" : [],
"Technicians" : [],
"_id" : ObjectId("537b5ea4c61b1d1743f4341f"),
"budgets" : [
{
"concepts" : [
{
"position" : 0,
"description" : "A",
"price" : "1",
"qty" : "11",
"total" : 11
},
{
"position" : 1,
"description" : "A",
"price" : "2",
"qty" : "22",
"total" : 44
},
{
"position" : 2,
"description" : "A",
"price" : "3",
"qty" : "33",
"total" : 99
},
{
"position" : 3,
"description" : "A",
"price" : "4",
"qty" : "44",
"total" : 176
}
],
"date" : "2014-05-21T10:20:48.696Z",
"id" : 9989,
"status" : "joooder",
"total" : 500
},
{
"id" : 260,
"date" : "2014-05-22T11:12:40.260Z",
"concepts" : [
{
"position" : 0,
"description" : "Nueva",
"price" : "1",
"qty" : "1",
"total" : 1
}
],
"total" : 1,
"status" : "pending"
},
{
"id" : 111,
"date" : "2014-05-22T13:36:28.111Z",
"concepts" : [
{
"position" : 0,
"description" : "Blabla",
"price" : "1",
"qty" : "11",
"total" : 11
}
],
"total" : 11,
"status" : "pending"
}
]
}
Now, I want to get the budgets, but only the budgets if status is quals to pending, but I need to find in all documents of collection.
I tried this:
db.orders.aggregate(
{ $unwind : "$budgets" },
{ $match : {
"budgets.status": "pending"
}});
But this isn't ok...
Edit two:
With this:
db.orders.aggregate(
{ $project : {
budgets : 1
}},
{ $match : {
"budgets.status": "pending"
}});
I get this:
{
"result" : [
{
"_id" : ObjectId("537b5ea4c61b1d1743f4341f"),
"budgets" : [
{
"concepts" : [
{
"position" : 0,
"description" : "A",
"price" : "1",
"qty" : "11",
"total" : 11
},
{
"position" : 1,
"description" : "A",
"price" : "2",
"qty" : "22",
"total" : 44
},
{
"position" : 2,
"description" : "A",
"price" : "3",
"qty" : "33",
"total" : 99
},
{
"position" : 3,
"description" : "A",
"price" : "4",
"qty" : "44",
"total" : 176
}
],
"date" : "2014-05-21T10:20:48.696Z",
"id" : 9989,
"status" : "joooder",
"total" : 500
},
{
"id" : 260,
"date" : "2014-05-22T11:12:40.260Z",
"concepts" : [
{
"position" : 0,
"description" : "Nueva",
"price" : "1",
"qty" : "1",
"total" : 1
}
],
"total" : 1,
"status" : "pending"
},
{
"id" : 111,
"date" : "2014-05-22T13:36:28.111Z",
"concepts" : [
{
"position" : 0,
"description" : "Blabla",
"price" : "1",
"qty" : "11",
"total" : 11
}
],
"total" : 11,
"status" : "pending"
}
]
}
],
"ok" : 1
}
The first status item isn't pending.