How data is saved in firestore?
Saving user-related data Once you have an authenticated user’s unique identifier, you can start saving documents to your Firestore with the UID as the identifier. Every time the user logs in, it simply looks for the document in your Firestore to retrieve the information related to this user/login. }); });
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How do I save my list in firestore?
2 answers. You can store two lists in Firestore. One with your actual (messy) data and the other with an id map to request. Then combine the streams with rxdart’s combineLatest2 to sort the actual list in your app whenever any of the lists change.
How do you reduce a read in firestore?
This means that Cloud Firestore will attempt to retrieve an updated snapshot (fetched by the server), but will return the cached data again if the server is unreachable. This is how we can reduce the number of reads in Cloud Firestore, by forcing the SDK to use only the offline cache and fetch data only on demand.
How does firestore store JSON?
alternate solution
- JSON.parse() for the db body. collection(‘market’). doc(‘price’). set(JSON. parse(body));
- JSON.stringify() for the body. database collection(‘market’)doc(‘price’). set(JSON.stringify(body));
How do I stop duplicates in firestore?
There is no way to check the entire collection for duplicates in the security rules, as that would require Cloud Firestore to read all the documents in the collection (which would be very expensive at scale). The above only allows to create a document, it does not allow to update it.
How do I send JSON to firestore?
To add this data to Firestore, create a Firestore account and go to Settings -> General and then scroll down to “Your Apps” and click the icon. Then grab apiKey, authDomain, and projectID from the popup menu and insert it into the code at the end of this article. Almost done!
How to save user data in Cloud Firestore?
Saving user-related data, such as profile information, with Cloud Firestore is easy. Once you have a unique authenticated user identifier, you can start saving documents to your Firestore with the UID as the identifier.
Why does FireStore get stuck for so long?
When Firestore’s getDocument/addSnapshotListener methods get stuck, they appear to get stuck for periods that are approximately multiples of 30 seconds. Perhaps this could help the Firebase team isolate where in the SDK it’s getting stuck? It looks like this is a known issue and Firestore engineers are working on a fix.
What is the performance issue with Firebase and FireStore?
Well for firebase and firestore performance and cold start issues: firebase.auth().onAuthStateChanged() fires approx. after 1.5 – 2 seconds, already pretty bad. If you return a user, we use their ID to get the user document from firestore.
How long does it take to get a user document from FireStore?
If you return a user, we use their ID to get the user document from firestore. This is the first call to firestore and the corresponding get() takes 4-5 seconds. The subsequent obtaining () of the same or other documents takes approx. 500 ms. So in total user initialization takes 6-7 seconds, completely unacceptable.