create_screen.dart

import 'package:flutter/material.dart';
import 'package:flutter_supabase_yt_1/models/models.dart';
import 'package:flutter_supabase_yt_1/utils/utils.dart';
import 'package:supabase_flutter/supabase_flutter.dart';

class CreateScreen extends StatefulWidget {
  const CreateScreen({Key? key}) : super(key: key);

  @override
  State<CreateScreen> createState() => _CreateScreenState();
}

class _CreateScreenState extends State<CreateScreen> {
  TextEditingController todoController = TextEditingController();

// instance
  SupabaseDataManager supabaseDataManager = SupabaseDataManager();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Create')),
      body: Padding(
        padding: const EdgeInsets.all(20),
        child: Form(
            child: Column(
          children: [
            TextFormField(
              // controller
              controller: todoController,
              decoration: const InputDecoration(hintText: 'Todo'),
            ),
            ElevatedButton(onPressed: _createdData, child: const Text('Create'))
          ],
        )),
      ),
    );
  }

  Future _createdData() async {
    Todo todo = Todo(title: todoController.text);

    PostgrestResponse<dynamic> res = await supabaseDataManager.createData(todo);

    if (res.error != null) {
      // ignore: use_build_context_synchronously
      ScaffoldMessenger.of(context)
          .showSnackBar(SnackBar(content: Text(res.error!.message)));
    }

    // ignore: use_build_context_synchronously
    ScaffoldMessenger.of(context)
        .showSnackBar(SnackBar(content: Text('Created')));
  }
}