Find and update child of child in MongoDB - node.js

Question

Let's take an exemple :
listCollection = {
id_list:"111",
child_list:[{
id_list:"222",
child_list:[{
id_list:"333",
child_list:[{
// and it can be more
}]
}]
}]
}
As you see, it is always the same object inside the same object. The initial object is :
var list = {
id_list: "string",
child_list:[]
};
Using mongoDB, I would like to Find, Update or Push list anywhere I want inside the collection, only by knowing the id_list.
This is the most far I was :
db.collection("listCollection").findOneAndUpdate({
"child_list.id_list": "listId"
}, {
"$push": {
"child_list.$.child_list": newList
}
}, function(err, success) {
if (err) {
console.log(err);
} else {
console.log(success);
}
})
It works fine for the first level of child, but not more.
I am pretty new to Node JS + mongoDB, can you help me a little bit with this ? Thank you :)

Answer 1

I have found my way through this. Not a really beautiful one, but a working one.
Let's retake my exemple :
listCollection = {
child_list:[{
child_list:[{
child_list:[
]
}]
}]
}
I want to add a new child_list at the end of the hierarchy. At the end, I want my collection to look like that :
listCollection = {
child_list:[{
child_list:[{
child_list:[{
child_list:[
]
}]
}]
}]
}
Yeah, it is kind of a dumb exemple but it is a simple one :)
So here is the object I want to insert :
var theNewChildList= {
child_list:[]
};
Then, I will need a kind of "route" of where I want to put theNewChildList.
Here, I want to push it at listCollection.child_list[0].child_list[0].child_list
So I just use that string :
var myRoute = "child_list.0.child_list.0.child_list";
Then, I prepare your mongoDB query like that :
var query = {};
query[myRoute] = theNewChildList;
and finally, I do the query :
db.collection("myCollectionOfList").findOneAndUpdate(
{}, // or any condition to find listCollection
{"$push": query},
function(err, success) {
if (err) {
console.log(err);
} else {
console.log(success);
}
})
And it works.
Note that you have many ways to prepare the var myRoute dynamically.
I you have other ideas, please share :)