Remove object from nested array of objects - node.js

Question

I got this user schema
const UserSchema = new Schema({
email: {
type: String,
required: true,
unique: true,
},
groups: [
{
groupName: {
type: String,
required: true,
},
groupMembers: [{ type: Schema.Types.ObjectId, ref: "GroupMember" }],
},
],
});
And I want to delete a group from the ‘groups’ array based on given ‘userId’ and ‘groupId’, my attempt (with express and mongoose):
router.delete(
"/:userId/:groupId",
catchAsync(async (req, res) => {
const { userId, groupId } = req.params;
const updatedUser = await User.findByIdAndUpdate(
userId,
{ $pull: { "groups.$._id": groupId } },
{ new: true }
);
res.send({ updatedUser });
})
);
The response of the request: I get an error: “The positional operator did not find the match needed from the query.”
Edit:
After I delete a group I need to remove all the group members in the groupMembers array.
User collection structure example:
{
"_id" : "111",
"email" : "michael#gmail.com",
"username" : "michael098",
"groups" : [
{
"_id" : "222"
"groupName" : "family",
"groupMembers" : [
{
"_id" : "333"
"name" : "Liam"
},
{
"_id" : "444"
"name" : "Noah"
}
]
},
{
"_id" : "555"
"groupName" : "friends",
"groupMembers" : [
{
"_id" : "666"
"name" : "Oliver"
}
]
}
]
}
Inside every group there is group members and I have a collection for the group members that I ref in the UserSchema : groupMembers: [{ type: Schema.Types.ObjectId, ref: "GroupMember" }]
GroupMember collection structure example:
{
{
"_id" : "333"
"name" : "Liam"
},
{
"_id" : "444"
"name" : "Noah"
},
{
"_id" : "666"
"name" : "Oliver"
}
}
For example when I get the params of userId="111" and groupId="222" I will delete the whole 'family' group and the whole group members in the groupMembers array (Liam and Noah) from the GroupMember collection.
GroupMember collection after deleting the group with _id="222":
{
{
"_id" : "666"
"name" : "Oliver"
}
}

Answer 1

Assuming an actual doc might look like this (using strings instead of ObjectId to keep the example tighter):
{_id:1, groups: [ { type: "ID1", ref: "XX" }, { type: "ID2", ref: "G1" }, { type: \
"ID3", ref: "G2" } ] }
then this update will remove the subdoc in the groups array where _id = 1 and type = ID2:
db.foo.update({_id:1},
{ $pull: { groups: { type: "ID2" } }}
);