Bring nested value to top level in MongoDB - mongodb

Question

I want to reshape a MongoDB document as followed:
This is how it looks at the moment:
{
"_id" : ObjectId("5a96d4a0af792cca1ec7d8cb"),
"Test" : "ABC",
"DATE" : "2018-02-28T16:04:55.00+01:00",
"Header" : "212735699",
"TraceIds" : [
{
"Id" : 1,
"Names" : [
{
"LangCode" : "de",
"CountryCode" : "DE",
"Text" : "Komponente"
},
{
"LangCode" : "en",
"CountryCode" : "US",
"Text" : "Component"
},
],
"Values" : [
{
"AId" : 1,
"Names" : [
{
"LangCode" : "de",
"CountryCode" : "DE",
"Text" : "Teil"
},
{
"LangCode" : "en",
"CountryCode" : "US",
"Text" : "Part"
},
],
"Value" : "1263000118"
},
]
}
],
Now I want to bring up the Value 1263000118 and give it the german name "Teil". All the other embedded values should vanish. So it should look like this:
{"_id" : ObjectId("5a96d4a0af792cca1ec7d8cb"),
"Test" : "ABC",
"DATE" : "2018-02-28T16:04:55.00+01:00",
"Header" : "212735699",
"Teil" : "1263000118",}
Would be great if someone could help me out here. Thanks

Answer 1

Use the aggregation framework :
db.collection.aggregate([
{$match: {
_id: your_id,
// Treatment to select which nested value you want
}},
{$project: {
_id: "$_id",
Test: "$Test",
DATE: "$DATE",
Header: "$Header",
Teil: "$Values.$.Value
}}
]);
Something like this should work