0
628
ViewsHow to get all documents in Firestore (v9) sub collection
I'm trying to get all documents in all sub-collection with Firebase V9, so I used collectionGroup to retrieve the data.
Here is my Firestore architecture :
bots (collection)
| id (doc ID)
| order_history (sub collection)
| id (doc ID)
createdBy: uid (user uid)
And this is how I try to get documents :
const [orders, setOrders] = useState([]);
const { user } = useAuth();
const getOrders = async () => {
const orders = await getDocs(query(collectionGroup(db, 'order_history'), where('createdBy', '==', user.uid)));
setOrders(orders.docs.map((doc) => ({
...doc.data()
})))
}
useEffect(() => {
getOrders();
console.log('orders ', orders); // return []
}, []);
This code returns an empty array.
Did I do something wrong?
·
Juan Pablo Isaza
2 answers
Answer question0
Your getOrders anonymous method execution requires an explicit return statement if there's more than 1 statement. Implicit returns work when only a single statement exists (and after some testing, return await X doesn't appear to work either).
const getOrders = async () => {
const orders = await getDocs(...);
setOrders(orders.docs.map(...))
}
Needs to be
const getOrders = async () => {
const orders = await getDocs(...);
return setOrders(orders.docs.map(...))
}
·
Juan Pablo Isaza
Report
0
I think your getOrders function is asynchronus function.
If you want debug log I think you should waiting for getOrders completed then orders had been updated.
Ex:
useEffect(() => {
console.log('orders ', orders);
}, [orders]);
·
Juan Pablo Isaza
Report
Answer question