Remove by _id inside a nested array, inside of a collection - mongodb

Question

this is my mongoDb footballers collection :
[
{
"_id" : ObjectId("5d83b4a7e5511f28847f1884"),
"prenom" : "djalil",
"pseudo" : "dja1000",
"email" : "djalil#gmail.com",
"selectionned" : [
{
"_id" : "5d83af3be5511f28847f187f",
"role" : "footballeur",
"prenom" : "Gilbert",
"pseudo" : "Gilbert",
},
{
"_id" : "5d83b3d5e5511f28847f1883",
"role" : "footballeur",
"prenom" : "Xavier",
"pseudo" : "xav4544",
}
]
},
{
"_id" : ObjectId("5d83afa8e5511f28847f1880"),
"prenom" : "Rolande",
"pseudo" : "Rolande4000",
"email" : "rolande#gmail.com",
"selectionned" : [
{
"_id" : "5d83b3d5e5511f28847f1883",
"role" : "footballeur",
"prenom" : "Xavier",
"pseudo" : "xav4544",
}
]
}
}
How could I delete each selectionned people who has the 5d83b3d5e5511f28847f1883 _id through all of the collection?
I do need xavier to deseappear from any 'selectionned' array , just like doing a 'delete cascade' in SQL language
This is what I've tried with no luck :
function delete_fb_from_all(fb){
var ObjectId = require('mongodb').ObjectID; //working
var idObj = ObjectId(fb._id); //working
try {
db.collection('footballers').remove( { "selectionned._id" : idObj } );
console.log('All have been erased');
} catch (e) {
console.log(e);
}
}
And this too is not working :
db.collection('footballers.selectionned').remove( { "_id" : idObj } );
i really dont know how to do this.
i'm trying out this right now :
db.collection.update({'footballers.selectionned': idObj }, {$pull: {footballers:{ selectionned: idObj}}})
This is the error :
TypeError: db.collection.update is not a function
I think that the solution is maybe there :
https://docs.mongodb.com/manual/reference/operator/update/pull/#pull-array-of-documents
EDIT 1
i'm currently trying ou this :
var ObjectId = require('mongodb').ObjectID; //working
var idObj = ObjectId(fb._id); //working
try {
db.collection('footballers').update(
{ },
{ $pull: { selectionned: { _id: idObj } } },
{ multi: true }
)
} catch (e) {
console.log(e);
}
SOLVED :
Specifiying the email, it is now working, I guess the problem was comin from the _id field :
try {
db.collection('footballers').update(
{ },
{ $pull: { selectionned: { email: fb.email } } },
{ multi: true }
)
} catch (e) {
console.log(e);
}

Answer 1

Object ID :
The issue is may be on your object id creation. No need to make string-id with mongoDB object id.
// No need
var ObjectId = require('mongodb').ObjectID;
var idObj = ObjectId(fb._id);
// do as normal string
db.collection('footballers').remove( { "selectionned._id" : fb._id } );