[英]How can I use riverpod's statenotifier for handling a form?
I'm trying to use StateNotifier to handle a form but watching the stateNotifierProvider, I get the object I'm trying to update instead of the provider.我正在尝试使用 StateNotifier 来处理表单,但在查看 stateNotifierProvider 时,我得到了 object 我正在尝试更新而不是提供程序。
Here is my implementation:这是我的实现:
final profileCreationFormNotifierProvider =
StateNotifierProvider((ref) => ProfileCreationFormNotifier());
class ProfileCreationFormNotifier extends StateNotifier<ProfileModel> {
ProfileCreationFormNotifier()
: super(
ProfileModel(
city: '',
country: '',
firstname: '',
lastname: '',
pictureUrl: '',
username: '',
gender: '',
),
);
void setFirstname(String firstname) {
state = state.copyWith(firstname: firstname);
}
void setLatstname(String lastname) {
state.copyWith(lastname: lastname);
}
void setUsername(String username) {
state.copyWith(username: username);
}
void setGender(String gender) {
state.copyWith(gender: gender);
}
}
Then in a Consumer widget I try to call the methods to update a field on the form like this然后在消费者小部件中,我尝试调用方法来更新表单上的字段,如下所示
Consumer(
builder:
(BuildContext context, ScopedReader watch, Widget? child) {
return CustomTextField(
controller: usernameFieldController,
hintText: 'Username',
isEmail: false,
onSave: (value) {
context
.read(profileCreationFormNotifierProvider)
.setUsername(value);
},
onValidate: (value) => validator(value!, "Username"),
secured: false,
);
},
),
I get the following error:我收到以下错误:
Class 'ProfileModel' has no instance method 'setUsername'. Class 'ProfileModel' 没有实例方法 'setUsername'。 Receiver: Instance of 'ProfileModel' Tried calling: setUsername("qsqsqsq")接收方:“ProfileModel”实例尝试调用:setUsername("qsqsqsq")
What I'm I doing wrong here?我在这里做错了什么?
I'm using hook_riverpod version: "0.14.0+2" Thank you for your help我正在使用 hook_riverpod 版本:“0.14.0+2” 谢谢你的帮助
As of Riverpod 0.14.0, State is the default value exposed by StateNotifierProvider.从 Riverpod 0.14.0 开始,State 是 StateNotifierProvider 公开的默认值。
Change:改变:
context
.read(profileCreationFormNotifierProvider)
.setUsername(value);
to:至:
context
.read(profileCreationFormNotifierProvider.notifier)
.setUsername(value);
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