How to set a specific quarry for a sub collection when using a snapshot ? I am tring to sort sub collection resutls by createdAt with the limit of last 5
useEffect(() => {
//const querydata = query(docRefComm, orderBy('createdAt'), limit(5));
let collectionRef = collection(db, 'Comm', docId, 'messages');
const unsub = onSnapshot(collectionRef , (doc) => {
doc.forEach((el) => {
console.log(el.data());
});
});
return () => {
unsub();
};
}
}, []);You can build a query() using CollectionReference as shown below:
let collectionRef = collection(db, 'Comm', docId, 'messages');
const q = query(collectionRef, orderBy('createdAt'), limit(5))
const unsub = onSnapshot(q , (qSnap) => {
})
Checkout Listen to multiple documents in a collection in the documentation.