Flutter querysnapshot to list How can I do this? I don't want to first load all A (it would be millions), but instead onlyload the A:s whose references are non-null and also have a timestamp greater than now. I want one list to contain all the data (routes) but I want the second to contain only one value from the snapshot ( Furthermore, the stream you have is not a stream of DocumentSnapshot s (which you can convert to UserTask s), but a stream of QuerySnapshot s (which you can convert to List<UserTask> s). Get to market quickly and securely with products that can scale globally I have a collection called users from Firebase as users. I want t I need to convert a snapshot from cloud firestore to a list, i know this is unnecessary to show the data but i need it to reorder the data based in other parameters, this is my code Stream chatRoo I have the code which only deals with searching words from cloud_firestore which is a firebase service. can you advise h Apr 3, 2020 · To know how to download the google-service. data()]); Jul 23, 2025 · A StreamBuilder in Flutter is used to listen to a stream of data and rebuild its widget subtree whenever new data is emitted by the stream. Nov 20, 2018 · List<QuerySnapshot> querySnapshotData = snapshot1. Mar 28, 2025 · In asynchronous programming with Dart and Flutter, StreamSubscription is a fundamental concept that every developer should master. instance . In short, how do I convert my stream to a List? Note: I’m pretty new to the world of Dart, so go easy on me 🙂 Thanks! 1 Answers collectionSnapshot. I have a users collection that contains some fields like firstName, but also an array ca May 16, 2023 · I don't understand this QuerySnapshot thing and I need to get a List of map from it to turn it into a List of Object Asked 2 years, 5 months ago Modified 2 years, 5 months ago Viewed 19 times Sep 9, 2020 · How to list subcollection on firestore? Also, all Firestore queries are shallow, meaning they only consider documents in one collection at a time. Discover a simple way to convert a `Stream QuerySnapshot Map String, dynamic ` to a `List Object ` in Flutter for seamless data handling. May 13, 2021 · The following assertion was thrown building StreamBuilder<QuerySnapshot> (dirty, state: _StreamBuilderBaseState<QuerySnapshot, AsyncSnapshot Asked 4 years, 5 months ago Dec 12, 2020 · in my Flutter app, I need to get array data from Firestore with uid but neither of my code variants works as I want it to. single in addition to await to get just a single element, and toList() should be removed. My be something like this: Jan 31, 2021 · The snapshot. STEP 1: You need to add the following package in the dependencies of pubspec. I'm away from my primary Flutter/dart computer at the moment, but here's a rough direction. Additional query for every DocumentSnapshot within StreamBuilder Here’s my code. May 10, 2018 · Hi there, fine people. This article provides an in-depth exploration of The problem is I have to make 'profileName' called by querysnapshot 'case insensitive'. The push() method generates a unique key every time a new child is added to the specified Firebase reference. documents); return q. I'm trying to call list of users from cloud firestore with querysnapshot when users call search feature and then string submitted. We will cover the steps and techniques required to fetch data from Firestore, handle asynchronous operations, and dynamically sort the data based on user interactions. Future getP() async { var firestore = Firestore. Jul 10, 2022 · snapshots() will return a stream, so you should use it when you wan't to listen to realtime updates. So just use map to transform your Snapshots into Lists. snapshot() Retrieve List<DocumentSnapshot> from a snapshot. the data is retireved correctly, however passing the data from the future function making the result always null. where('day', isLessThanOrEqualTo: end Dec 18, 2019 · I'm trying to query a few documents from a collection, this query should listen to changes made in the queried documents, so I'd need a stream. Jul 22, 2019 · With the code above, since it doesn't wait for the entire stream (or any of it actually), list is always returned as null. document(id) . docs returns an array of all the documents in the QuerySnapshot and obviously it's not a type of Food. Problem: So far so ok, but as soon as i call a future function on a querysnapshot, i dont get any userdata. I can list the users in this collection. If you simply want to get all your UserTask s once, you should have a Future instead of a Stream. I have read several other posts about using Firebase API docs for the AsyncSnapshot class from the widgets library, for the Dart programming language. Main Concepts Models Factory Method StreamBuilder. Nov 12, 2023 · Issue I have a snapshot from firestore that I need to convert to a List list. it is possible to convert it? May 27, 2020 · The issue seems to be with your return type for categoryList. I m not getting any idea about how to do this with QuerySnapshot variable. vrkkf mugp hzv jvjz camkb pbeni hkphzl twsr mgbmx luuir noxz njcrp kue ppdyxs qupc