How to use update aggregation in MongoDb - mongodb

Question

my sample db:
"Employee": [ { "empeId": "e001",
"fName": "James",
"lName": "Bond",
"email": "jamesbond#hotmail.com",
"experience": [
"Database Design",
"SQL",
"Java" ]
},
{ "empeId": "e002",
"fName": "Harry",
"lName": "Potter",
"experience": [
"Data Warehouse",
"SQL",
"Spark Scala",
"Java Scripts" ]
} ],
"Project": [ { "projectId": "p001",
"projectTitle": "Install MongoDB" },
{ "projectId": "p002",
"projectTitle": "Install Oracle" },
{ "projectId": "p003",
"projectTitle": "Install Hadoop" } ],
"EmployeeProject": [ { "empeId": "e001",
"projectId": "p001",
"hoursWorked": 4 },
{ "empeId": "e001",
"projectId": "p003",
"hoursWorked": 2 },
{ "empeId": "e002",
"projectId": "p003",
"hoursWorked": 5 } ]
I want to update the array experience with 'test' of user with empeId: e001
desired output:
"Employee": [ { "empeId": "e001",
"fName": "James",
"lName": "Bond",
"email": "jamesbond#hotmail.com",
"experience": [
"Database Design",
"SQL",
"Java",
"test"
]
}]
I tried using
db.emp.updateOne([
{$unwind: "$Employee"},
{$match: {"Employee.emepId" : "e001" }}
],
{$push: {"Employee.experience" : "test"}})
and I get Syntax Error: Invalid property id #(shell):1:31
is this how the syntax for update with pipeline aggregation works?

Answer 1

The easiest and clean way(using arrayFilters):
db.collection.update({ Employee.empeId" : "e001"},
{
"$push": {
"Employee.$[x].experience": "test"
}
},
{
arrayFilters: [
{
"x.empeId": "e001"
}
]
})
Playground1
And via update/aggregation:
db.collection.update({ Employee.empeId" : "e001" },
[
{
$set: {
"Employee": {
$map: {
input: "$Employee",
as: "m",
in: {
$cond: [
{
$eq: [
"$$m.empeId",
"e001"
]
},
{
$mergeObjects: [
"$$m",
{
experience: {
$concatArrays: [
"$$m.experience",
[
"test"
]
]
}
}
]
},
"$$m"
]
}
}
}
}
}
])
Playground2