flutter_form_builder v3 error

[pcccccc]

I use the value of FormBuilderDropdown to add or remove rows when

flutter: Field with attribute 'attribute' already exists. Make sure that two or more fields don't have the
flutter: same attribute name.
flutter: 'package:flutter_form_builder/src/form_builder.dart': Failed assertion: line 64 pos 12:
flutter: '_fieldKeys.containsKey(attribute) == false'

How can I configure to add or delete rows?

`_formList.add(
FormBuilderDropdown(
attribute: "test",
decoration: InputDecoration(labelText: "test"),
items: _accountTypeOptionsList,
initialValue: _accountTypeOptionsList[0].value,
validators: [],
onChanged: (value) {

        _fbKey.currentState.reset();

        if (value == 0) {

          _formList.add(
            FormBuilderTextField(
              attribute: 'attribute',
              decoration: InputDecoration(
                labelText: 'test',
                hintText: 'test',
                enabledBorder: UnderlineInputBorder(
                  borderSide: BorderSide(width: 0.2),
                ),
                focusedBorder: UnderlineInputBorder(
                  borderSide: BorderSide(width: 0.2, color: Common.themeColor()),
                ),
              ),
              validators: [],
            ),
          );
        }else {
          _formList.removeLast();
        }
        setState(() {

        });
        print(value);
      },
    )
);`

[pcccccc]

`_formList.add(
FormBuilderDropdown(
attribute: "test",
decoration: InputDecoration(labelText: "test"),
items: _accountTypeOptionsList,
initialValue: _accountTypeOptionsList[0].value,
validators: [],
onChanged: (value) {

        _fbKey.currentState.reset();

        if (value == 0) {

          _formList.add(
            FormBuilderTextField(
              attribute: 'attribute',
              decoration: InputDecoration(
                labelText: 'test',
                hintText: 'test',
                enabledBorder: UnderlineInputBorder(
                  borderSide: BorderSide(width: 0.2),
                ),
                focusedBorder: UnderlineInputBorder(
                  borderSide: BorderSide(width: 0.2, color: Common.themeColor()),
                ),
              ),
              validators: [],
            ),
          );
        }else {
          _formList.removeLast();
        }
        setState(() {

        });
        print(value);
      },
    )
);`

[danvick]

Hi @pcccccc,
Kindly include more code so that I can have working code to reproduce the error.

[pcccccc]

@danvick
main.dart.zip
pubspec.yaml : flutter_form_builder: ^3.0.0-beta.9

[danvick]

I've gone through the bug and it has unraveled a fundamental issue in the package. Consequently I've published version 3.0.0-beta.10 which addresses the issue.
Kindly update and let me know if the problem has been sorted.
It's working well on my side after the update.

Thanks for bringing this up as it has helped us stabilize the package further as the release of v3 is nearing.

[pcccccc]

use 3.0.0-beta.10
@danvick thx

[shrutikateiosys]

hi @danvick i am also facing same issue.
i had made use of flutter form builder updated package for building dynamic form. all working good. even if i remove last item from list in remove properly using removeAt(index) but when i try to remove middle index it throw error attribute id already exist. what goes wrong.