I just came to issues looking for a way to nest forms, appreciate this!

Thanks a lot for this contribution! Will be a big step foward to improve this package.
Because this is a new important feature, required some changes to can be stable and easy to use for all

Hi, I have been testing this new feature (it's awesome btw, thanks for the PR) and I was wondering how validation will work? For me right now, validating the parent/main form didn't trigger validation on the nested/child fields.

I got the nested form validation to work for me by adding a validator to the FormBuilderField of NestedFormBuilder, like so:

@override
 Widget build(BuildContext context) => FormBuilderField<Map<String, dynamic>>(
 name: name,
 initialValue:
 parentFormKey?.currentState?.initialValue[name] ?? initialValue,
 valueTransformer: valueTransformer ?? (_) => _,
 onReset: () => formKey.currentState?.reset(),
 // Added validator here
 validator: (_) =>
 (formKey.currentState?.validate() ?? false) ? null : '',
 builder: (field) => FormBuilder(
 key: formKey,
 initialValue: field.value ?? {},
 onChanged: () {
 final st = formKey.currentState;
 if (st == null) return;
 st.save();
 field.didChange(valueTransformer?.call(st.value) ?? st.value);
 },
 autovalidateMode: autovalidateMode,
 onWillPop: onWillPop,
 skipDisabled: skipDisabled,
 enabled: enabled,
 autoFocusOnValidationFailure: autoFocusOnValidationFailure,
 clearValueOnUnregister: clearValueOnUnregister,
 child: child,
 ),
 );

Something else worth noting, I had to add

autovalidateMode: autovalidateMode,

just below the new validator, otherwise the nested form was validating on every change. Previously the autovalidateMode was only being passed to the FormBuilder and not the FormBuilderField component

Any update on this? This is such a game changer that is desperately needed.

Ready for nested forms 👍

any update on this ?

It doesn't seem to solve all use cases, for example, if I have a nested list,

{
 "foo": "foo value0",
 "inner": [
 {
 "bar": "bar value1",
 "baz": "baz value2"
 },
 {
 "bar": "bar value1",
 "baz": "baz value2"
 }
 ]
}

any updates?

any updates?

@mustafamasri1 can follow the new features here: #1466
Also, can support the package development here: https://opencollective.com/flutter-form-builder-ecosystem