I need to write a query in golang with mgo, here's the query in the mongo:
db.some.aggregate([
{$match: { "data.id": "11111" }},
{$project: {
_id : 0,
url : { $concat: [ "https://www.someurl.com/","$data.aID" ]},
items :{
"$map":{
"input":"$data.items",
"as":"it",
"in":{
"item_title":"$$it.title",
"item_id":"$$it.id"
}}}}])
I will be grateful if you will help in this problem.
// I apologize for the incorrectly posed question, in the future I will follow the instructions, my problem was with $concat