Filtering & Sorting Firebase (Firestore) Data on a Flutter App

Question

If my user database is on Firestore and on Registration I ask each users a set of few questions (checkboxes, radio buttons, etc). I want to create a Filter and Sort mechanism where a user is able to filter and sort a list of other users (from Firestore) based on multiple filter parameters sorted according to a particular field.

Is what I want to create even possible on Firebase (FireStore) and Flutter or do I need anything else?

Can anybody please link me to any relating Flutter/Firebase documentation, YouTube videos, or any other relevant content.

Rohan Taneja · Accepted Answer · 2018-09-21 22:37:20Z

1

Once you fetch your list of users from Firestore, you can easily sort and filter them using the methods provided by the List class in Flutter:

sort method for sorting: https://docs.flutter.io/flutter/dart-core/List/sort.html

retainWhere method for filtering: https://docs.flutter.io/flutter/dart-core/List/retainWhere.html

answered Sep 21, 2018 at 22:37

Rohan Taneja

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Manish Sahu · Accepted Answer · 2022-02-08 19:23:41Z

0

You can create multiple filter and ordering in firestore in flutter app.

 QuerySnapshot orderQuerySnapshot = await orderCollection
            .where("status", isEqualTo: status)
            .where("timestamp", isGreaterThanOrEqualTo: lowerDate)
            .where("timestamp", isLessThanOrEqualTo: upperDate)
            .orderBy('timestamp', descending: true)
            .get();

answered Feb 8, 2022 at 19:23

Manish Sahu

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