Flutter querysnapshot to list dart'; class FireTest { Future<List<UserCheck>> streamUser(FirebaseUser user) async { DocumentSnapshot querySnapshot = await Firestore. With each item I can do . For example, query a list of {users} from Firebase collection where their {lastName} = "Smith", returning the resulting list. it is possible to convert it? May 27, 2020 · The issue seems to be with your return type for categoryList. I get constant errors around data types/return types etc. But, the user uid must be stay in member field (array) of group Collection. 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. single in addition to await to get just a single element, and toList() should be removed. I'm trying to get a list from my Firebase Realtime Database into my app as a Mar 9, 2020 · Hello there! The purpose of this arcticle is to be very objective and summarize all about how to access and make the most common queries to Firestore using Flutter, Google's Mobile App SDK. instance . google. instance; var q = await firestore. map((doc) => [doc. that type don’t have length, or elementAt like normal List<dynamic’> type. All persons involved are new to flutter so all code is basically done by examples from the net. 1- NoSuchMethodError: invalid member on null: 'toList 2- An exception was throw by _MapStream<QuerySnapshot, List> listened by Build AI-powered mobile and web apps and features with the Gemini and Imagen models using Firebase AI Logic. Dec 3, 2023 · Stream<List> getHistory(String id, DateTime start, DateTime end) async* { await for (QuerySnapshot querySnapshot in Firestore. document(user. I'm away from my primary Flutter/dart computer at the moment, but here's a rough direction. toString()); }, What you probably want is to get one or more of the fields from the document's data, and display that. A guide to getting real-time updates from Cloud Firestore using snapshot listeners. documents. Are you aware that broadcast streams drop events when no one is listening? I'm going to close. Future getP() async { var firestore = Firestore. json file, you can check the first article in the above list. documents; } I Jun 23, 2022 · An exception was throw by _MapStream<QuerySnapshot<Map<String, dynamic>>, List<UserModel>?> listened by StreamProvider<List<UserModel>?>, but no `catchError` was provided. Nov 5, 2022 · This code is running fine with futurebuilder and i m getting a listview properly. collect Oct 12, 2021 · Let see how to retrive data from the firebase. 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. collection('place_list'). I created new collection named categories. collection('posts'). I want the function to: Query the 'chat' collection on the field 'users'. Feb 16, 2020 · In this guide, we will use a list of data in a listview and perform the different queries provided by firebase realtime database in a flutter application - 2024 update 1 How to convert querysnapshot to list in flutter? 2 How to get sub collection data from Firebase with flutter? 3 How to use Firebase queries in flutter by Peter Haddad? 4 Which is the best database to use for flutter? A QuerySnapshot contains zero or more QueryDocumentSnapshot objects representing the results of a query. I'm trying to call list of users from cloud firestore with querysnapshot when users call search feature and then string submitted. Installation To get started with Firebase UI for Firestore, you first need to ensure the cloud_firestore plugin is installed on your project. The code that does the sorting can remain the same (assuming the actual sort is what you want), but you'll need to return the result of event. toObjects (): List <T> Returns the contents of the documents in the QuerySnapshot, converted to the provided class, as a list. Consider instead maintaining the list of projects in a document that you can get() directly. My be something like this: Jan 31, 2021 · The snapshot. Nov 12, 2023 · Issue I have a snapshot from firestore that I need to convert to a List list. A stream builder is a widget that will take a stream of data and essentially observe it for changes — that way when the stream I set up Firestore in my project. How do I… Sep 29, 2020 · []; I get this two errors, and app displays red screen. but while listing, I want to print these users to the list with their index number. id, doc. My be something like this: Jun 13, 2022 · How to fetch specific data from querysnapshot in flutter Issue I am trying for so long to fetch specific data out of firebase collection using Futurebuilder querysnapshot. Nov 20, 2018 · List<QuerySnapshot> querySnapshotData = snapshot1. Changing the StreamBuilder configuration to another stream during event generation introduces snapshot pairs of the form: May 12, 2021 · Pulling data from QuerySnapshot in flutter Asked 3 years, 11 months ago Modified 3 years, 11 months ago Viewed 311 times Jun 30, 2021 · On an earlier version of Flutter, it was working, on 2. of<List<Location>>(context); and then I have access to that stream converted to a List. dart'; import 'package:oast_app/widgets/auth_class. I am getting the error in this code segment when I try to add the _eventsStream to the streamController: Apr 11, 2021 · Caution: there are two common meanings for snapshot. I have read several other posts about using Firebase API docs for the AsyncSnapshot class from the widgets library, for the Dart programming language. Jan 11, 2020 · I tried searching other questions but the only similar question to this had answers in JavaScript instead of Dart/Flutter. This limit is fixed and cannot be adjusted. May 26, 2018 · I am wondering how to get data from firestore to my Flutter app using the StreamBuilder. Jul 10, 2022 · snapshots() will return a stream, so you should use it when you wan't to listen to realtime updates. collection("users"). 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. What do you mean by listening directly from DatabaseService? And, would that fix the problem i have? Apr 5, 2022 · I am learning Flutter chat app from Angela YU but this part of code is just like as she wrote but for me not working and it has lots of errors StreamBuilder<QuerySnapshot>( stream: Dec 16, 2022 · Flutter _JsonQuerySnapshot' has no instance method ' []' Issue I have collection for Users and groups, I want to display list of last update groups. If you haven't already done so, install the flutterfire_ui package by running the following command in your terminal: Aug 8, 2021 · Flutter Assigning QuerySnapshot to Map<dynamic, dynamic> Asked 3 years, 9 months ago Modified 3 years, 8 months ago Viewed 1k times That gives my a list but a list of JsonQueryDocumentSnapshot. Here is the data model for Events: String? id; String? eventName; DateTime So I can then use this list that Flutterflow recognizes ⛔ I know about the newly released API Intercept feature and routing cloud functions through API calls but I dont want to open yet another box of things I don't fully understand yet haha May 25, 2021 · I'm trying to get a List<dynamic'> _list but since I upgraded flutter to 2. docs? I once get all documents of a collection. You can use that list to then query each subcollection directly. Sep 4, 2022 · On the explore page, I get() the entire users collection to create a user list and search results. The push() method generates a unique key every time a new child is added to the specified Firebase reference. I am trying to do the following: await FirebaseFirestore. The best option is to process snapshot. Here my codes: When I am using this I can't get any data from Firestore Fu Dec 5, 2022 · I’m trying to fetch documents from my firebase DB and use them to create a social media feed. Say The problem is I have to make 'profileName' called by querysnapshot 'case insensitive'. My list is returning as null when I do this. Sep 24, 2022 · Every time there's a change to the data in Firestore, the stream fires an event with a QuerySnapshot that contains all data for that query/collection in the database. like 1 2 3 4 5 Dec 14, 2019 · So the problem was in the builder:(BuildContext context, AsyncSnapshot snapshot) it should have been (BuildContext context, AsyncSnapshot'<'QuerySnapshot'>' snapshot) with that added you'll be able to access snapshot. https://codelabs. collection("habits") . currentUser!. Now, you have to iterate over the array of documents and use the data member that gives all the data of this snapshot. docChanges, which allows you to see what changed between this QuerySnapshot and the previous one. 0, I had to change my code to _list (QuerySnapshot<Map<String, dynamic>> snapshot). My be something like this: Aug 27, 2020 · Flutter query snapshot - map to list if conditional is met #3376 Unanswered OGmetamonkey asked this question in Q&A edited With the code above, since it doesn’t wait for the entire stream (or any of it actually), list is always returned as null. The documents can be accessed as an array via the documents property or enumerated using the forEach method. Syntax of Oct 26, 2020 · I'm flutter user with firebase connected. snapshots () should return a QuerySnapshot. 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. where('day', isGreaterThanOrEqualTo: start) . I want to merge two different streams to one, to create my Chat Screen. collection("groups") Apr 29, 2020 · I am trying to retrieve data from Firebase Realtime Database into a list in Flutter using a model. In this collection I created three documents with uniq id. 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. This part is the same as FutureBuilder Conclusion Pass Future or Stream, then handle a snapshot in builder Reference official document if needed (Because Flutter is updating frequently) If there are any mistakes please let me know Jun 2, 2022 · How to convert a LIst<> to Stream<List<>> in dart for flutter streambuilder Asked 3 years, 5 months ago Modified 3 years, 5 months ago Viewed 2k times With the code above, since it doesn’t wait for the entire stream (or any of it actually), list is always returned as null. It allows you to respond to real-time Nov 11, 2020 · Hello everyone, in this article i will share my experience build search item in list using streambuilder in flutter. Anyway, what I want to do is get the value from "field. toList(); //copy document snapshots from second stream to first so querySnapshotData[0]. documents[index] Feb 20, 2021 · I am trying to build a list based on this example from google. So i need a flutterFire method to convert all uppercase characters from cloud firestore to lowercase characters. documents return List and not List types, you will need to convert List of documentsnapshots to List<Map<dynamic, dynamic>>. yaml. I was asked to enhance the code to add user-management (admin functions). Unfortunately, i couldn't find simple property to set case Nov 8, 2020 · To query 2 collections in Firebase, use the following code snippet: Stream<List<QuerySnapshot>> getData(String searchQuery) { Stream stream1 = FirebaseFirestore A guide to getting data from Cloud Firestore, including how to read documents and collections. The Future in there means that the QuerySnapshot is asynchronously loaded, and you need to handle that asynchronous behavior when you call it. getDocuments(); print(q. 6 days ago · API docs for the StreamSubscription class from the dart:async library, for the Dart programming language. docs. Searching is done fine and everything is working fine but i would love to convert my firebase Extension functions toObjects inline fun <T : Any> QuerySnapshot. docs; The two options are to either use then or use await. You're returning as List of List s when the Stream only contains a single layer of List. Notice the plural there. I’ve made a class for querysnapshot which is: class Crud { final currentUser = FirebaseAuth. I’m in need of some small assistance with using Cloud Firestore using Flutter (Dart). I'm doing following (in Dart/Flutter) Stream<Li Nov 20, 2024 · A simple Flutter app that fetches and displays a list of data from Firebase Firestore. So, I use StreamBuilder and get snapshot like this, FirebaseFirestore. Mar 28, 2025 · In asynchronous programming with Dart and Flutter, StreamSubscription is a fundamental concept that every developer should master. get(); if Mar 12, 2019 · console. Jan 15, 2021 · I'm new to flutter and I want to make two different Lists using only one function. timestamp > now. buildProfilePosts() { if Dec 25, 2021 · I was trying to list some data with ListTile from Firestore Database. Your code currently doesn't do that. Jan 24, 2021 · A QuerySnapshot for the list of documents from the database. Use . It's commonly used for real-time updates, such as when working with streams of data from network requests, databases, or other asynchronous sources. How can I convert a Stream<QuerySnapshot<Map<String, dynamic>>> to a List May 5, 2021 · Your stream is FirebaseFirestore. data (). For example- If user1 sends a message to user2, it gets stored in- What is querySnapshot flutter? A QuerySnapshot contains the results of a query. If you want to make a one-time query, use get() instead of snapshots() and await the result. it is possible to convert it? How do I return a QuerySnapshot as a Future >> ? Code snippet: I think I need to use a Map of but couldn't get around it to work. First you have to make link of firebase with flutter then this tutorial will be helpful to you Aug 30, 2020 · ════════ Exception caught by widgets library ═══════════════════════════════════════════════════════ The following assertion was thrown building StreamBuilder (dirty, state: _StreamBuilderBaseState<QuerySnapshot Jul 15, 2020 · my this code is showing me error that querysnapshot is not a subtype of a list. document('VtL1sxOoCOdJaOTT87IbMRwBe282') . It can contain zero or more DocumentSnapshot objects. that type don't have length, or elementAt like normal List<dynamic'> type. StreamBuilder( stream: Firestore Reference for QuerySnapshot Nov 6, 2018 · First we define a new StreamBuilder with the type QuerySnapshot. docs returns an array of all the documents in the QuerySnapshot and obviously it’s not a type of Food. first, . I can list the users in this collection. docs: But if you want to get the document of a particular user, then you can do: Jun 22, 2018 · collectionSnapshot. Subclassing Note: Cloud Firestore classes are not meant to be subclassed except for use in test mocks. If you simply want to get all your UserTask s once, you should have a Future instead of a Stream. One common task is converting a QuerySnapshot into a List to display in UI components like Column or ListView. Dec 26, 2020 · How to use GroupedListView using Streambuilder and firebase QuerySnapshot Asked 4 years, 4 months ago Modified 2 years, 9 months ago Viewed 415 times Jan 10, 2024 · Hi everyone, I am trying to create a custom function that returns list of documents based on 2 conditions: 1. For example, profileName 'HELLO WORLD' in cloud firestore must be printed as 'hello world' in my android studio flutter console. 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. Inside each of those user documents is a collection posts that I also need to get to create a GridView of each post. can you edit my code and tell me how to make this error free. A much simpler fix is to keep processing the snapshot. In this article, we are going to see an example of a Streambuilder Widget by taking an Example. data () and I get the info I need, but how could I get this map directly in the list without calling extra methods? Jan 7, 2023 · I can't seem to figure out how to get a List after querying a specific Firestore collection. uid). dart'; import 'package:firebase_auth/firebase_auth. This article provides an in-depth exploration of The problem is I have to make 'profileName' called by querysnapshot 'case insensitive'. . Subclassing is not supported in production code and new SDK releases may break code that does so. My be something like this: Aug 20, 2021 · Guys how can i retrieve a specific document from QuerySnapshot. One is the one you use with StreamBuilder or FutureBuilder in the build method. How do I get specific values from a datasnapshot in flutter? Asked 7 years, 6 months ago Modified 1 year, 8 months ago Viewed 30k times Issue I’m trying to get a List<dynamic’> _list but since I upgraded flutter to 2. There are no deep or recursive queries. snapshot() Retrieve List<DocumentSnapshot> from a snapshot. instance. And while pulling the data from the database, I got the exception below. Each item in that list is then a DocumentSnapshot with a snapshot of the data from a single document. documents QuerySnapshot without the quotes around the angle brackets, I had to put them there for it to show up here on Stackoverflow. data value in the builder at Feb 16, 2022 · In this article, we will use Cloud Firestore in a Flutter application, in which we will create a simple application to show how to model our data class so we can send, retrieve, delete and update data. 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. In the last two articles, I created a form using Flutter performed queries for the realtime Continue to help good content that is interesting, well-researched, and useful, rise to the top! To gain full voting privileges, Jun 23, 2019 · I need to update a document with nested arrays in Firestore with Flutter. 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! Jun 13, 2022 · I am trying for so long to fetch specific data out of firebase collection using Futurebuilder querysnapshot. I've made a class for querysnapshot which is: class Crud { final currentUser = Firebas I’m trying to get a List<dynamic’> _list but since I upgraded flutter to 2. Flutter Fire Type cast AsyncSnapshot<QuerySnapShot<Map<String, dynamic>>> to List<dynamic>? Dec 17, 2023 · I posted a similar question and later found a solution: make the widget returned by the itemBuilder stateful and use a FutureBuilder in it. get(); Map each of QuerySnapshot docs into your kako. docs); You can convert the document API docs for the QuerySnapshot class from the cloud_firestore library, for the Dart programming language. Main Concepts Models Factory Method StreamBuilder. data!. I think this should be asked on SO and in case it turns out to actually be an issue in Flutter please add a comment to get it reopened or create a new issue. uid; Future<QuerySnapshot> getData() async { Reading and writing lists Append to a list of data Use the push() method to append data to a list in multiuser applications. 0 it is showing the following error: The argument type 'StreamTransformer<dynamic, dynamic>' can't be assigned to the parameter type 'StreamTransformer<QuerySnapshot, List<Message>>' Query limitations The following list summarizes Cloud Firestore query limitations: Cloud Firestore provides support for logical OR queries through the or, in, and array-contains-any operators. log("raw querysnapshot : \n", querySnapshot) //from each doc grab the two key data points and // pair them in a sub array and pass the 2D arr return querySnapshot. Nov 16, 2019 · Maybe it's a newbie question, but I'm learning flutter and some stuffs like async, await, Future, doesn't fit in my mind yet. So I need to get the full document into a Map, reorder the maps in the "sections" array, and then store the data back into May 2, 2023 · Your querySnapshot function returns a Future<QuerySnapshot<Map<String, dynamic>>>. Aug 13, 2020 · I think you need a transform instead of a listen, as your code transforms the data from a QuerySnapshot to a List<DocumentSnapshot>. snapshots() which is a QuerySnapshot, meaning, a List of QueryDocumentSnapshot which Extends DocumentSnapshot. In short, how do I convert my stream to a List? Feb 26, 2020 · Future getP() async { var firestore = Firestore. Table of Contents Basics Getting data Get a single document Get a whole collection Updating data Inserting data Example database To examplify our tutorial, I'm gonna introduce a sample database which Dec 11, 2019 · import 'package:cloud_firestore/cloud_firestore. 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. Now I want to get this collection in my Flutter application s FlutterFire UI for Firestore enables you to easily integrate your application UI with your Cloud Firestore database. So if you want the documentSnapshot of every users in your 'users' collection, you will have to iterate over snapshot. collection("users") . Jun 3, 2021 · The function . Sep 12, 2021 · QuerySnapshot querySnapshot = await fireStore. Additional query for every DocumentSnapshot within StreamBuilder Here’s my code. Jul 21, 2022 · When you load data from Firestore, you get a DocumentSnapshot for each document. An exception was throw by _MapStream<QuerySnapshot<Map<String, dynamic>>, List<UserModel>?> listened by Oct 15, 2024 · When building apps that require real-time data updates, such as chat apps or live notifications, Flutter’s StreamBuilder widget becomes a go-to solution. May 10, 2018 · Hi there, fine people. So I have this firebase document here I want to create an announcement object for each of the announcements above and stream it as a list. STEP 1: You need to add the following package in the dependencies of pubspec. Sep 12, 2022 · Exploring data operations using cloud_firestore in Flutter In this article, we will take a look at some basic concepts used in FlutterFire’s cloud_firestore plugin and how to make use of various … May 28, 2021 · In the last update of cloud_firestore, I get an error when I run the app with the old code. I have been reading about AsyncSnapshot snapshots and they come back as json, correct? I need to convert the data in the snapshot to a list of the type "Events" for an appointment screen. docs returns an array of all the documents in the QuerySnapshot and obviously it's not a type of Food. The return type should be Future<List<String>>. Since you're calling toString() on that here, you see the debug representation of the object in your UI: itemBuilder: (BuildContext context, int index) { return Text(snapshot. So just use map to transform your Snapshots into Lists. ---This video is b You have a Stream<AsyncSnapshot<QuerySnapshot>> now, and you want a Stream<List<String>>. docs as you already, but Mar 8, 2024 · Flutter StreamBuilder<QuerySnapshot> and build List is not working Asked 1 year, 8 months ago Modified 1 year, 8 months ago Viewed 38 times Oct 7, 2022 · In my flutter/dart app, I have a list of IDs from document (of the same collection) that I want to retrieve from FireStore. try accessing snapshot. can you advise h Apr 3, 2020 · To know how to download the google-service. Unfortunately, i couldn't find simple property to set case Apr 6, 2020 · In the map function, use fold on the List to remove duplicates and map to List<DocumentSnapshot> In the fold function, go over every document in the QuerySnapshot and check if the document with the same id is already present before adding. Dec 25, 2021 · For my flutter app, I am fetching a collection as a querysnapshot and converting it into a list using: I would like to get a list of A where B. collection("history") . 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. Dec 16, 2023 · The snapshot. User model, and lastly cast it into list by toList() Nov 30, 2020 · Use StreamBuilder Pass Stream<QuerySnapshot> to stream FirebaseFirestore. collection('users'). Problem: So far so ok, but as soon as i call a future function on a querysnapshot, i dont get any userdata. Jun 19, 2021 · I think I need to convert from Map<DateTime,List> type to _MapStream<QuerySnapshot<Map<String, dynamic>>, List> but I don't know what this type is. data. I actually find this much easier to see in code, as in this example from the FlutterFire documentation: With the code above, since it doesn’t wait for the entire stream (or any of it actually), list is always returned as null. documents); return q. sort() (hence the need to use transform). Unfortunately, you often use a Firebase snapshot in a FutureBuilder or StreamBuilder, which also uses the term snapshot, and the snapshot from Firebase ends up in the snapshot. developers. addAll(snapshot. docs and you should get a List which you can then access each QueryDocumentSnapshot data using doc. Apr 26, 2022 · I have a simple flutter code to retrieve some data from Firestore. … In this article, we will discuss how to implement asynchronous sorting in a Flutter DataGrid that retrieves data from Firestore. But i want to see into the documents n print the details in console. And after some code, i want to get a document by its ID from that collection. These queries are limited to 30 disjunctions based on the query's disjunctive normal form. This implementation I used Provider for state… Mar 14, 2022 · The pre-existing code is getting data from a firestore database. I m not getting any idea about how to do this with QuerySnapshot variable. Discover a simple way to convert a `Stream QuerySnapshot Map String, dynamic ` to a `List Object ` in Flutter for seamless data handling. Retrieve only the document (s 1 Answers collectionSnapshot. List<DocumentSnapshot<Map<String, dynamic>>> documentList = querySnapshot(). the data is retireved correctly, however passing the data from the future function making the result always null. docs[index]. First, "pujaName"(basically the service they wants for themself) selected by user on app Change this: (DocumentSnapshot document) { into this: (DocumentSnapshot<Map<String,dynamic>> document) { data() returns a value of type T and the class DocumenSnapshot is declared in this way: abstract class DocumentSnapshot<T extends Object?>, therefore if you don’t specify a type for DocumentSnapshot then data() will return a value of type Object. it is possible to convert it? To access the documents within a QuerySnapshot, call the docs property, which returns a List containing DocumentSnapshot classes. I created the necessary Boilerplate code I have the widget built and working and in the below code API docs for the CollectionReference class from the firebase_firestore library, for the Dart programming language. In short, how do I convert my stream to a List? Sep 25, 2025 · In Flutter, you might be working with data coming from Firebase Firestore. last, or . The names of all the attributes in the database and co Feb 2, 2022 · I've reached a roadblock while trying to create a chat app. By using these auto-generated keys for each new element in the list, several clients can add children to the same location at the same time without write Nov 13, 2025 · A guide to working with lists of data in the Firebase Realtime Database for your Flutter app, including how to append, sort, and filter data, and how to listen for changes to the list. documents will have all documents from both query snapshots The actual sequence of invocations of the builder depends on the relative timing of events produced by the stream and the build rate of the Flutter pipeline. Using that data you could convert it to any type of instance you wish. Nov 12, 2025 · collectionSnapshot. So, instead of this foodType1Cloud. document(id) . It's weird that you have a variable named collectionReference which is apparently a Stream. Get Started With Cloud Firestore This is the eleventh article related to Firebase in Flutter, you can check the previous articles in the below links: Get Started With Firebase in Flutter Using Oct 22, 2018 · I assume that the stream is just not emitting an event after StreamBuilder subscribes. 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. documents; } I think I have to call it n wait for the responses then print them, can anyone guide me how to do it? I am a little stuck in my project to learn more about flutter and hope you can help me out or give me some advice for some lecture :) I have two collections in my firestore db - one user and one gr Dec 5, 2022 · How to use querySnapshot in a listview builder? (flutter) Asked 2 years, 11 months ago Modified 2 years, 11 months ago Viewed 568 times Mar 25, 2022 · Flutter Fire Type cast AsyncSnapshot<QuerySnapShot<Map<String, dynamic>>> to List<dynamic>? Asked 3 years, 2 months ago Modified 3 years, 2 months ago Viewed 1k times Apr 21, 2021 · I'm trying to read a Collection using a QuerySnapshot, and store these values in a List. The other is the kind of data you get back from Firebase. Jul 24, 2020 · Whenever I need to use Locations, I start with final locations = Provider. com/codelabs/flutter-firebase#8 Somehow, there is an error in this Jul 24, 2022 · My Flutter project has two main pages: a) A list page which uses a QuerySnapshot to list all the documents, and for each one of these documents you can click a button to land on b) a detail page which lists and update the details of a single document. In your case, your would want to use a new Stateful widget instead of ListTile, so you can add the FutureBuilder to call an async function. ebdm dmso gaw xsx wdwwig ymb xjyz rmk phlva xgsab pykdbh zkpp oegc pdfvci qxifri