Unable to set the initial values of the fields

[DinoSane]

I've tried the simplest FormBuilder to read and write SharedPreferences.

TextFormField(initialValue: _name ) shows as it should

FormBuilderInput.textField(
type: FormBuilderInput.TYPE_TEXT,
attribute: "name",
value: _name,
label: "Name:",
)

Does not!

[danvick]

Hello @DinoSane,
I'm unable to reproduce your issue, could you kindly elaborate on the issue, more code could be helpful.

[DinoSane]

I created a simple project to ilustrate the problem
can you clone it?

git clone git@bitbucket.org:dinosane/form_builder.git

thanks in advance.

[danvick]

Please note that your string is fetched from SharedPreferences after the form is already built since the fetching is asyncronous. See code below and the corresponding console output:

`class _FailingPageState extends State {
String _aStringValue = '';

@OverRide
void initState() {
_loadVals();
super.initState();
}

//Loading counter value on start
_loadVals() async {
SharedPreferences prefs = await SharedPreferences.getInstance();
prefs.setString('aStringValue', 'My string value');
_aStringValue = prefs.getString('aStringValue');
print("After fetch '$_aStringValue'");
}

@OverRide
Widget build(BuildContext context) {
print("During build '$_aStringValue'");
return SharedScaffold(
titulo: 'Failing',
body: Padding(
padding: EdgeInsets.all(20.0),
child: Padding(
padding: EdgeInsets.all(20.0),
child: FormBuilder(
context,
autovalidate: true,
controls: [
FormBuilderInput.textField(
type: FormBuilderInput.TYPE_TEXT,
attribute: "aStringValue",
value: _aStringValue,
label: "Any Value:",
)
],
onChanged: () async {},
onSubmit: (formValue) async {
if (formValue != null) {
print(formValue);
final prefs = await SharedPreferences.getInstance();
prefs.setString('aStringValue', formValue['aStringValue']);
} else {
print("Form invalid");
}
},
),
),
),
);
}
}`

Console:
Performing hot restart... Syncing files to device Android SDK built for x86... Restarted application in 1,699ms. I/flutter ( 4934): During build '' I/flutter ( 4934): After fetch 'My string value'

I'd advise declaring the form within a FutureBuilder or a similar implementation

[DinoSane]

You are correct!

Using a FutureBuilder solve the problem.

I though setting the value inside a setState was suffice, but as you pointed, it doesn't.
Thanks.

[DinoSane]

I forgot to say: great job! :-)

[danvick]

You're welcome @DinoSane. Thank you.

Also note that you're not really required to use setState() when setting a value within initState()