ReadMeFeed / Community knowledge

Firebase

Real questions. Useful conversations. Find the people who know your stack.

Ask a question

Discover topics

Cards Compact list

Community & Careers

Question1 answer2,166 followingActive 15 Feb 2022, 13:33 UTC75.4K views651 votes

owner answered

Repeated execution of Firebase Realtime Database transaction function causing duplicate writes

Ensure that side‑effects inside a Firebase Realtime Database transaction execute only once despite the SDK’s automatic retry mechanism. The SDK may invoke the transaction function up to 25 times when a conflict is detected, and it does not expose a retry count or provide built‑in deduplication, leaving developers to decide whether to make the function idempo

Community & Careers · Editorial question

realtime-database

firebase retries

Community & Careers

Question1 answer1 comment3,453 followingActive 26 Dec 2020, 01:36 UTC60.5K views1,980 votes

owner answered

How can I paginate Firestore results between a lower and upper bound using query cursors without fetching previous pages?

I need to retrieve a specific page of results from a Firestore collection ordered by population, while restricting the results to a defined lower and upper population bound (e.g., between 1,000,000 and 5,000,000). The collection is large and frequently updated, so I want to avoid reading all preceding pages to reach the desired page. I plan to use query curs

Community & Careers · Editorial question

firestore query-cursors

firebase

Rin Moss

Asked25 Dec 2020, 14:00 UTC

Level 1New User rank0 rep points

Tasadduq Burneyowner

answered26 Dec 2020, 01:36 UTC

Level 35Owner29,275 rep points