CODEWITHSUNDEEP
fluttergoogle-cloud-firestore
user1717140
user1717140

Reputation: 353

Keep firesotrore collection available offline and sync it on foreground

What is the best approach to keep data of collection available offline (0 - 100 docs) and sync it on app startup if connection available?

UPD: I'm looking to setPersistenceEnabled but is there any guarantee my collection will be cached after first retrieve?

Upvotes: 0

Views: 53

Answers (1)

bartektartanus
bartektartanus

Reputation: 16080

If you call setPersistenceEnabled(true) these documents will be available offline and synced when connection is available again (not necessarily at app startup). Check documentation: https://firebase.google.com/docs/database/android/offline-capabilities

By enabling persistence, any data that the Firebase Realtime Database client would sync while online persists to disk and is available offline, even when the user or operating system restarts the app. This means your app works as it would online by using the local data stored in the cache. Listener callbacks will continue to fire for local updates.

Also be aware that when you use this, then at app startup your listeners will be called TWICE! One - for offline (cached) data and second - online (read from firebase).

Upvotes: 2

Related Questions