db.collection.aggregate([
{
$match: {
Deal: {
$exists: true
}
}
},
{
$lookup: {
from: "collection",
let: {
name: "$Deal.name"
},
pipeline: [
{
$match: {
data: {
$exists: true
}
}
},
{
$project: {
data: {
$reduce: {
input: {
$objectToArray: "$data.Inside_data.project"
},
initialValue: {},
in: {
$cond: [
{
$eq: [
"$$this.k",
"$$name"
]
},
"$$this.v",
"$$value"
]
}
}
}
}
},
{
$project: {
_id: 0,
alpha: "$data.alpha",
beta: "$data.beta"
}
}
],
as: "Deal.data"
}
},
{
$unwind: "$Deal.data"
}
])
Antwort von @turivishal
