How I can replace the object key with root, in MongoDB - arrays

Question

"data": {
"abc": {
"Id": "100",
"print": "number",
"uploadAt" : "2021-22-01",
"servicesAt" : "2020-01-12"
},
"xyz": {
"Id": "123",
"print": "number",
"uploadAt" : "2021-22-01",
"servicesAt" : "2020-01-12"
}
}
Explanation
I want to remove the root data, rest of the in side the data objects abc, xyz will remain as it is, in the 2nd step I want to replace the object value number with id key , I want to to do this dynamically,
Expected Output
{
"abc": {
"number": "100",
"print": "number",
"uploadAt" : "2021-22-01",
"servicesAt" : "2020-01-12"
},
"xyz": {
"number": "123",
"print": "number",
"uploadAt" : "2021-22-01",
"servicesAt" : "2020-01-12"
}
}

Answer 1

UPDATE based on comments
Solution #3:
db.testCollection.aggregate([
{
$addFields: {
"array": { $objectToArray: "$data" }
}
},
{ $unwind: "$array" },
{
$addFields: { "array.v.number": "$array.v.Id" }
},
{
$project: { "array.v.Id": 0 } // Optional
},
{
$group: {
_id: "$_id",
array: { $push: "$array" }
}
},
{
$replaceRoot: {
newRoot: { $arrayToObject: "$array" }
}
}
]);
Solution #2: If you do not wat to rename filed Id to number then the solution is simple:
db.testCollection.aggregate([
{
$replaceRoot: {
newRoot: {
$arrayToObject: { $objectToArray: "$data" }
}
}
}
]);
Output:
{
"abc" : {
"Id" : "100",
"print" : "number",
"uploadAt" : "2021-22-01",
"servicesAt" : "2020-01-12"
},
"xyz" : {
"Id" : "123",
"print" : "number",
"uploadAt" : "2021-22-01",
"servicesAt" : "2020-01-12"
}
}
OLD SOLUTION
Try this
db.testCollection.aggregate([
{
$replaceRoot: {
newRoot: {
$arrayToObject: {
$map: {
input: { $objectToArray: "$data" },
as: "item",
in: {
k: "$$item.k",
v: {
number: "$$item.v.Id",
print: "$$item.v.print",
uploadAt: "$$item.v.uploadAt",
servicesAt: "$$item.v.servicesAt"
}
}
}
}
}
}
}
]);
Output
{
"abc" : {
"number" : "100",
"print" : "number",
"uploadAt" : "2021-22-01",
"servicesAt" : "2020-01-12"
},
"xyz" : {
"number" : "123",
"print" : "number",
"uploadAt" : "2021-22-01",
"servicesAt" : "2020-01-12"
}
}