Field recording as Null in Firestore Flutter

Question

I’m trying to record a document inside another document (nested Documents) in Flutter with Firestore. The model is a property that has some fields, and next to the fields a collection of comforts, which in turn have only one id (imovelId) and description (description).

I managed to record the Real Estate, however when I try to record a commode in the collection of commodes inside a property, the description of the comfort always stays "null".

The structure looks like this:

[Imóvel]
    |-> imovelId: 'id do imovel'
    |-> endereco: 'endereco do imovel'
    |-> data:     'data da vistoria'
    |
    |->[Comodos]
           |
           |-> comodoId: 'valor do id deste comodo'
           |-> descricao: 'ex. Quarto'

Can someone help me understand what I’m doing wrong?

immovable model:

class Imovel {
  String imovelId;
  String endereco;
  String data;

  List<dynamic> comodos = [];

  Imovel(
      {this.imovelId, this.endereco, this.data, this.luz, this.agua, this.gas});

  Imovel.fromMap(Map<String, dynamic> json) {
    imovelId = json['imovelId'];
    endereco = json['endereco'];
    data = json['data'];

  }

  Map<String, dynamic> toMap() {
    final Map<String, dynamic> data = new Map<String, dynamic>();
    data['imovelId'] = this.imovelId;
    data['endereco'] = this.endereco;
    data['data'] = this.data;
    data['comodos'] = this.comodos;
    return data;
  }
}

class Comodo {
  String comodoId;
  String descricao;

  Comodo({this.comodoId, this.descricao});

  Comodo.fromMap(Map<String, dynamic> json) {
    comodoId = json['comodoId'];
    descricao = json['descricao'];
  }

  Map<String, dynamic> toMap() {
    final Map<String, dynamic> data = new Map<String, dynamic>();
    data['comodoId'] = this.comodoId;
    data['descricao'] = this.descricao;
    return data;
  }
}

Provider:

class ImovelProvider with ChangeNotifier {
  var firestoreService = FirestoreService();
  String _imovelId;
  String _endereco;
  String _data;

  String _comodoId;
  String _descricao;
  var uuid = Uuid();

  // Getters
  String get imovelId => _imovelId;
  String get endereco => _endereco;
  String get data => _data;
  String get comodoId => _comodoId;
  String get descricao => _descricao;


  carregarValoresComodo(Comodo comodo) {
    _comodoId = comodo.comodoId;
    _descricao = comodo.descricao;
    notifyListeners();
  }

  salvarComodo() {
    if (_comodoId == null) {
      var novoComodo = Comodo(comodoId: Uuid().v4(), descricao: descricao);
      firestoreService.salvarComodo(novoComodo, Imovel(imovelId: imovelId));
      notifyListeners();
    } else {
      var comodoExistente = Comodo(
        comodoId: _comodoId,
        descricao: _descricao,
      );
      firestoreService.salvarComodo(
          comodoExistente, Imovel(imovelId: _imovelId));
      notifyListeners();
    }
  }

Service:

import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:jc_vistoria/models/imovel.dart';

class FirestoreService {
  FirebaseFirestore _db = FirebaseFirestore.instance;



  Future<void> salvarComodo(Comodo comodo, Imovel imovel) {
    return _db
        .collection("imoveis")
        .doc(imovel.imovelId)
        .collection('comodos')
        .doc(comodo.comodoId)
        .set(comodo.toMap());
  }

}

Screen edit_comodo.Dart:

 class EditComodo extends StatefulWidget {
  final Comodo comodo;
  final Imovel imovel;

  EditComodo([this.comodo, this.imovel]);

  @override
  _EditComodoState createState() => _EditComodoState();
}

class _EditComodoState extends State<EditComodo> {
  final descricaoController = TextEditingController();

  @override
  void dispose() {
    descricaoController.dispose();
    super.dispose();
  }

  @override
  void initState() {
    if (widget.comodo == null) {
      //Novo imovel
      descricaoController.text = "";

      new Future.delayed(Duration.zero, () {
        final imovelProvider =
            Provider.of<ImovelProvider>(context, listen: false);
        imovelProvider.carregarValoresComodo(Comodo());
      });
    } else {
      //Imovel existente
      descricaoController.text = widget.comodo.descricao;

      // atualiza os estados
      new Future.delayed(Duration.zero, () {
        final imovelProvider =
            Provider.of<ImovelProvider>(context, listen: false);
        imovelProvider.carregarValoresComodo(widget.comodo);
      });
    }
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    final imovelProvider = Provider.of<ImovelProvider>(context);

    return Scaffold(
      appBar: AppBar(title: Text('Adicionar/Editar comodos')),
      body: Padding(
        padding: const EdgeInsets.all(28.0),
        child: ListView(children: <Widget>[
          Text(
            'Descrição:',
            textAlign: TextAlign.left,
            style: TextStyle(fontWeight: FontWeight.bold),
          ),
          TextFormField(
            decoration:
                InputDecoration(hintText: "Digite a descrição deste comodo..."),
            keyboardType: TextInputType.text,
            controller: descricaoController,
          ),
          SizedBox(height: 20),
          Row(mainAxisAlignment: MainAxisAlignment.center, children: [
            RaisedButton(
              color: Colors.green,
              textColor: Colors.white,
              onPressed: () {
                imovelProvider.salvarComodo();
                Navigator.of(context).pop();
              },
              child: Icon(Icons.save),
            ),
            SizedBox(width: 10),
            RaisedButton(
              color: Colors.yellow,
              textColor: Colors.black,
              onPressed: () {},
              child: Icon(Icons.border_top),
            ),
            SizedBox(width: 10),
            RaisedButton(
              color: Colors.red,
              textColor: Colors.white,
              onPressed: () {
                imovelProvider.removerComodo(widget.comodo, widget.imovel);
                Navigator.of(context).pop();
              },
              child: Icon(Icons.delete_forever),
            )
          ])
        ]),
      ),
    );
  }
}

Answer 1

I found the fault. Needed to define the function in Textformfield:

onChanged: (value) {
            imovelProvider.mudarDescricao(value);
          }),