Mongoose how to find specific value - node.js

Question

After a lot of reading, I am stuck.
the code I posted here, is the implementation of a store database I am trying to make.
in every store, we have some fields. I am interested in doing something with the items array, that contains JSON variables.
I want to filter the items through three filters, firstly by the store ID, secondly by the category ID, and the last filter will be the semi category ID.
I want to send the data from the front end, meaning I supply STOREID, the CategoryID, and the SemiCategoryID.
after receiving the data at the back end side, I am expecting to receive only the relevant items according to the data supplied by the front end.
{
"_id": {
"$oid": "5a1844b5685cb50a38adf5bb" --> **ID of the STORE**
},
"name": "ACE",
"user_id": "59e4c41105d1f6227c1771ea",
"imageURL": "none",
"rating": 5,
"items": [
{
"name": "NirCohen",
"categoryID": "5a0c2d292235680012bd12c9",
"semiCatID": "5a0c2d5a2235680012bd12ca",
"_id": {
"$oid": "5a1958181cd8a208882a80f9"
}
},
{
"name": "he",
"categoryID": "5a0c2d292235680012bd12c9",
"semiCatID": "5a0c2d5a2235680012bd12ca",
"_id": {
"$oid": "5a1973c40e561e08b8aaf2b2"
}
},
{
"name": "a",
"categoryID": "5a0c2d292235680012bd12c9",
"semiCatID": "5a0c2d5a2235680012bd12ca",
"_id": {
"$oid": "5a197439bc1310314c4c583b"
}
},
{
"name": "aaa",
"categoryID": "5a0c2d292235680012bd12c9",
"semiCatID": "5a0c2d5a2235680012bd12ca",
"_id": {
"$oid": "5a197474558a921bb043317b"
}
},
],
"__v": 9
}
and I want the Backend to return the filtered items according to the query.
The problem is, I am not managing to get the CORRECT query.
your help will be much appreciated,
thank you in advance.

Answer 1

If I understand you correctly, you are doing something like this:
Store.find({}).then(..);
If you only want to find the stores where categoryID is equal to the variable myCategory, you could filter them out by using:
Store.find({semiCatID: myCategory}).then(..);
Please let me know if this is not what you are after, then we can keep trying to figure this out together.
EDIT: So you are sending the variables StoreID, CategoryID and SemiCategoryID from the frontend. Receive them in the backend, and want to filter your database collection matching all three fields?
If so.. then I think all you have to do is change your current query:
store.findOne({ _id: req.body.userID }, (err, store) => { console.log(store); });
To something like:
store.findOne({
_id: req.body.userID,
storeID: req.body.StoreID,
categoryID: req.body.CategoryID,
semiCategoryID: req.body.SemiCategoryID
}, (err, store) => { console.log(store); });
This way, the objects you get back from mongo must match all four criterias given from the frontend.

Answer 2

As far as I Understood your question here is my answer to it you can use findById
Store.findById({//store id}).then(..);
or
Store.findOne({_id:ObjectID(storeID)}).then(..);