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Questions tagged [riverpod]

For questions relating to the "riverpod" package for the Flutter framework.

1086 questions
19
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3 answers

Riverpod : Alternate way of overriding initState inside ConsumerWidget

What is the solution of initializing things inside consumerWidget as because the initState method is not overridable here?
towhid
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16
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1 answer

Flutter Riverpod ref.read() vs ref.listen() vs ref.watch()

After reading the documentation, it did not explain very well what ref.read(), ref.watch(), and ref.listen() is. The questions I have are as follows: What is the purpose and difference between these functions? Where and where not can I use these…
Vraj Shah
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13
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2 answers

The type 'StateNotifierProvider' is declared with 2 type parameters, but 1 type arguments were given

In the context of a Flutter 2.0.5 app whose state I'd like to manage with Riverpod, I thought I can declare a StateNotifierProvider like this: import 'package:flutter_riverpod/flutter_riverpod.dart'; final counterProvider =…
Giorgio
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13
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5 answers

error `pumpAndSettle timed out` MAYBE due to riverpod

I'm stuck with a widget test and I could use some help to reproduce the behavior please run the code sample below import 'package:flutter/material.dart'; import 'package:hooks_riverpod/hooks_riverpod.dart'; import 'home_page.dart'; void main() =>…
Francesco Iapicca
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13
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3 answers

Riverpod, reading state in outside BuildContext and Provider

I am struggling to figure out why this is not working (as opposed to the documentation which states it should be working). I have a provider something like this import 'package:hooks_riverpod/hooks_riverpod.dart'; import…
ptheofan
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13
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2 answers

RiverPod - How to await using FutureProvider on AsyncValue not in widget

I need to get 1 field 1 time from Firebase Cloud Firestore. How do I accomplish this with providers outside of Widget build? Below are my combined providers. appStartupProvider is a FutureProvider and I want to get the bool value from this 1 field…
Zelf
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13
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3 answers

Implement ChangeNotifier vs StateNotifier

I'm quite familiar with Provider package and combine it with the ChangeNotifier. Let's say I have 3 getters and method with a different function : Toggle Loading Toggle Image Loading Toggle ObsecurePassword Using ChangeNotifer import…
Zeffry Reynando
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11
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2 answers

How to use a riverpod family provider without passing parameter

Is there a way to access an instance of a provided ".family" change notifier (which has already been instantiated, passing the right parameters) without passing the parameters again? IN PROVIDER When you create a provider of a ChangeNotifier (which…
Prince
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11
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1 answer

Flutter Riverpod context.read vs Provider in the build method

In the Riverpod documentation it says: That's where context.read(myProvider) is a solution. Using it, we could refactor our previous code to: @override Widget build(BuildContext context) { return RaisedButton( onPressed: () =>…
Suragch
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9
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1 answer

combine FutureProviders into a StateNotifierProvider

I'm using riverpod with Freezed unions. I'm trying to merge/watch two FutureProviders that both return the same type into a StateNotifierProvider and use them to set state. I've noticed that because I'm watching two futureProviders, that it creates…
aidanmack
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9
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1 answer

Dart Riverpod: Undefined class 'WidgetRef'

I'm going through Flutter Riverpod package documentation, and for some reason the basic example in 'Getting started' is throwing Error: Undefined class 'WidgetRef'. Try changing the name to the name of an existing class, or creating a class with…
Natnael A.
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9
votes
3 answers

Type 'Null' is not a subtype of type 'Map' in type cast error

In my sample project I implemented project with riverpod package and freezed. In the code below, I can get data from the server successfully, but when I try to use model.fromJson I get this error: getting type 'Null' is not a subtype of type…
DolDurma
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9
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3 answers

Implementing pull-to-refresh in Flutter with Riverpod

I am new to Riverpod and trying to implement pull to refresh with Riverpod in my Flutter app and can't seem to find any good tutorial online. Has anyone implemented pull-to-refresh in their Flutter app while using Riverpod. I have looked for…
camboo_babbage
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9
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2 answers

Flutter make a form with provider and riverpod

I'm new with Flutter and I want to upgrade my code. I have a form that uses multiple textformfields and I want to convert this code using provider and riverpod to improve readability but I'm not sure how to do it. For the example I simplified my…
xenos92
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8
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1 answer

Flutter riverpod debounce multiple dependent providers

As described in the Riverpod docs, a Riverpod provider can watch other providers to make a "processing pipeline". I have something like this: final prov = Provider((ref){ final w1 = ref.watch(prov1); final w2 = ref.watch(prov2); …
DaveBound
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