Flutter Heroes

New post on /r/flutterdev subreddit: Firebase & Flutter how to structure my data and how avoid high costs by checking if a username already exists currenty when somebody registers in my app, im providing an Input field which returns if the entered username already exists in the database.

Future getUserName(String userNameFieldInput) { print('userNameFieldInput: $userNameFieldInput'); return FirebaseFirestore.instance .collection('usernames') .doc(userNameFieldInput) .get() .then((value) => value.exists ? true : false) .catchError((error) => print(error)); } 

Im returning true or false and thats totally fine. Im not sure if my database structure is fine for that. I would love to have some recommendations on here. Also how many reads do we have here? IM using the Firestore.

Collection: I-- usernames I I- marcel I I- tim I I------ USERID: true I I-- users I I-- USERID I I-- USERID I I-- name: marcel I I-- gender: male I I-- hobbys: snowboarding I 

March 14, 2021 at 12:01PM by md186 https://ift.tt/3bLYWvM

New post on /r/flutterdev subreddit: FlutterForce — Week 112 https://ift.tt/38FTCs2 March 14, 2021 at 12:04PM by flutterist https://ift.tt/3eCFRxS

New post on Flutter Dev Google group: how to save a list of data to a variable in flutter dart , please help me im new to flutter hi, var users = [ {id :3,name : adel,description: agent},{ id :4,name : anu,description: Manager,}, {id:5,name:arun,description:poen} ] here i want to save each json object save in separate variable ,so i can acess it easily, how to do that for (int i =0; i

New post on /r/flutterdev subreddit: Retrieve Data for a Leader board in flutter apps with firebase Im breaking my head up with this question. I didn't find a good solution yet getting for example the top 10 rated movies of the day, of the week, of the month in a smart way from my firebase firestore.Does anybody already made experience with such leaderboard data in his app and has a nice approach how to retrieve that data in a nice way? This seems to be really rare if you do some research on that topic.Im very interested in your solutions!

Already tried something like this which isn't good since we have to do a lot sorting on client: 

QuerySnapshot snapshot = await FirebaseFirestore.instance.collection('tasks').where('dateWhenProofed', isGreaterThanOrEqualTo: 1).orderBy('dateWhenProofed', descending: true).limit(10).get(); snapshot.docs.forEach((document) {Data data = Data.fromJson(document.data());_rankingResult.add(data);_rankingResult.sort((a, b) => b.rating.compareTo(a.rating)); });Everything I tried ends up isn't fine yet or ends up in limitations. March 14, 2021 at 10:16AM by md186 https://ift.tt/2PWHcoV

New post on /r/flutterdev subreddit: What do you think are flutter's biggest drawbacks right now and do you think the flutter team will be able to solve them in the future? I'm trying to get into mobile development and flutter seems to tick all the boxes. However, as a beginner, there might be drawbacks that I am not aware of right now and therefore want to hear your opinion on the matter.Thanks! March 14, 2021 at 09:05AM by Dalcoy_96 https://ift.tt/30JMoi6

New post on /r/flutterdev subreddit: Is there a Flutter State Management tool like Vue's Vuex? I have worked with Provider and its great. I recently developed a Vue app and used Vuex for State management. It is awesome. I would love to know if there is any Flutter State Management tool like Vue's Vuex?Thanks March 14, 2021 at 08:32AM by ravgeet https://ift.tt/3ldiTyA

New post on /r/flutterdev subreddit: The `json_helpers` contains functions that make it easier decoding JSON objects directly from strings, lists and maps. https://pub.dev/packages/json_helpersAllows you to simplify decoding JSON objects directly from `String`, `List` and `Map` values (eg. from request body).```final list = '[{"name":"test1"},{"name":"test1"}]'.decodeJsonList((e) => Data.fromJson(e));print(list[0].name);​final data1 = '{"name":"test1"}'.decodeJson((e) => Data.fromJson(e));print(data1.name);​final data2 = {'name': 'test1'}.fromJson((e) => Data.fromJson(e));print(data2.name);``` March 14, 2021 at 07:51AM by andrew_mezoni https://ift.tt/3qKwOxw

New tweet from FlutterDev: 💙 Join us as we go live at #FlutterEngage India! 16 local communities in India will come together and host @filiphracek! Tune in to hear exciting #FlutterEngage announcements, updates on Flutter 2, demos and more! Let's go 👉 https://t.co/qg7MTSqLBC pic.twitter.com/b6ksjGdJ2v— Flutter (@FlutterDev) March 14, 2021 March 14, 2021 at 04:59AM http://twitter.com/FlutterDev/status/1370947742785286144

New post on /r/flutterdev subreddit: Integrating a Google Maps Widget w/ Custom Markers - Flutter Dev Series ... https://youtube.com/watch?v=uE-KKOiua_8&feature=share March 14, 2021 at 03:23AM by romanjustcodes https://ift.tt/3eAFzaN

New post on /r/flutterdev subreddit: What is your state management preference I've been trying out different state management tools for Flutter. For react projects I almost always go for redux, I could even say it's become standard for me and I assume for many people.I'm wondering how this is perceived for Flutter. What is your preference for state management and why? Also if your preference changes depending on context, would be nice to hear about it as well. March 13, 2021 at 10:17PM by Agyieus https://ift.tt/3crZ6Yl

New post on Flutter Dev Google group: /flutter_localizations.dart' Hello, I get an underlined error when I want to add "import 'package: flutter_localizations / flutter_localizations.dart';" in main.dart. error message: Target of URI doesn't exist: 'package: flutter_localizations / flutter_localizations.dart'. Try creating the file referenced by the URI, or March 13, 2021 at 10:59PM by Muti https://ift.tt/3csvGcv

New post on /r/flutterdev subreddit: Flutter Tutorial - Flutter Keys & Global Key (Johannes Milke) https://www.youtube.com/watch?v=jlZ8GV_3nnk March 12, 2021 at 11:27PM by JohannesMilke https://ift.tt/2Q1K303

New post on /r/flutterdev subreddit: 🔥 Make your Flutter app Multilingual in just 20 min 🔥 https://youtube.com/watch?v=b5Eg7sPiiKE&feature=share March 13, 2021 at 08:14PM by SnippetCoder_YT https://ift.tt/38y1s6Q

New post on /r/flutterdev subreddit: Flutter Engage India https://youtube.com/watch?v=_wC_0Irja2k&feature=share March 13, 2021 at 06:38PM by Pixelreddit https://ift.tt/3rX63He

New post on /r/flutterdev subreddit: What are the limitation of Flutter 2 Desktop ? I heard that Flutter Desktop don't support webview yet and also don't have a video playerWhat are the other limitations ?(Also tell about Web limitations ) March 13, 2021 at 06:58PM by RageshAntony https://ift.tt/3vm6jly

New post on /r/flutterdev subreddit: Flutter Tutorial - Flutter Keys - Value Key (Johannes Milke) https://www.youtube.com/watch?v=-F_5yHm_Zso March 13, 2021 at 05:25PM by JohannesMilke https://ift.tt/3lpfCwx

New post on /r/flutterdev subreddit: Which would be faster to learn and implement for a python programmer: Flutter or Ionic I only know python and I think I'm pretty decent at it. Given that, I want to make a mobile app. Ive broken down my options to Ionic or Flutter. If I go with Ionic I have to learn css/html/javascript. If I go with flutter I have to learn dart. Which option would be the faster for me to learn and implement an app given I'm coming from only python? Anyone with relevant experience that can provide insight here? March 13, 2021 at 03:38PM by miamiredo https://ift.tt/38AUXAk

New post on Flutter Dev Google group: Error: No named parameter with the name 'child'. Hello there, I'm working on a flutter project. When I try to check the web part I get this error. Launching lib \ main.dart on Chrome in debug mode ... lib / dialogs / common_dialogs.dart: 146: 7: Error: No named parameter with the name 'child'. child: AlertDialog ( ^^\\\\\\\\\\\ ' March 13, 2021 at 02:56PM by Muti https://ift.tt/3eyjRnZ

New post on /r/flutterdev subreddit: Generated classes I try to sync data via GraphQL from my backend. Therefore I use the artemis package to generate my classes. However I then want to cache the data localy and therefore use the sqfentity_gen package to generate classes to safe my data via sql. I can use a json constructor with each framework to convert the data between.However I want to encapsulate certain functionality since I dont want to just safe changed data localy but sync it to the backend and handle certain errors like merge conflicts or missing network. Therefore I am thinking about wrapping the classes with an other one since I cant change the generated code. Is this a good idea or are there other solutions which work better? Would you use a completly diffrent setup? Glad for any ideas March 13, 2021 at 01:05PM by spl45hX https://ift.tt/3qKJ9BN

New post on /r/flutterdev subreddit: Best way to have a list with self updating children (which the amount of can change constantly) Hello everyone,I'm building a qBittorrent controller in Flutter. Now I do have something that functions, but it does throw a few exceptions of the way I set it up and I don't know how to make it better, since I'm self thought. So I'm hoping you guys can help me or point me to something that already exists, here's the explanation:The app gets a list of torrents from the server. It then sorts these based on whether they are active and creates children with a ChangeNotifier to keep the values updated (1s if they are active, longer if they are not). This means the class that holds all the torrents also has to update to check if new ones are added or if the torrent went inactive and needs to reorder the list. This comes with a problem that if a torrent is removed or changed lists it gets removed from the widget tree, but the repeating update call gets executed in a ChangeNotifier that doesn't exist anymore. Also when a regroup happens a lot of widgets are rebuild that probably didn't change. This also means any state, for example if a child has been selected to show more information gets discarded every so many seconds.I'm not sure what a good way of handeling the data, displaying new data and keep them ordered would be, since I just lack experience. I hope it is clear enough. If you need more information do let me know!Thanks in advance :) March 13, 2021 at 01:28PM by vanthome https://ift.tt/3tfCQYp