我尝试在这里使用sqflite，但我一直得到这个错误，当我尝试插入值时，没有这样的表，但我想创建一个表

SqfliteDatabaseException (DatabaseException(no such table: usernotes (code 1 SQLITE_ERROR): , while compiling: INSERT OR REPLACE INTO usernotes (id, title, content) VALUES (?, ?, ?)) sql 'INSERT OR REPLACE INTO usernotes (id, title, content) VALUES (?, ?, ?)' args [2021-03-05 20:44:59.369377, a new note, what should i do]})

下面是我的数据库助手类和控制器

import 'package:mynotes/models/note_model.dart';
import 'package:sqflite/sqflite.dart' as sql;
import 'package:path/path.dart' as path;

class DBHelper {
  static sql.Database _database;

  static Future<void> init() async {
    if (_database != null) {
      return;
    }

    try {
      var databasePath = await sql.getDatabasesPath();
      String _path = path.join(databasePath, 'notes.db');
      _database = await sql.openDatabase(_path, version: 1, onCreate: onCreate);
    } catch (e) {
      print(e);
    }
  }

  static Future onCreate(sql.Database db, int version) async {
    await db.execute(
        'CREATE TABLE usernotes(id TEXT PRIMARY KEY,title TEXT,content TEXT)');
  }

  static Future insert(String table, NoteModel noteModel) async =>
      await _database.insert(table, noteModel.toMap(),
          conflictAlgorithm: sql.ConflictAlgorithm.replace);
}

还有这里

import 'package:mynotes/helper/db_helper.dart';
import 'package:mynotes/models/note_model.dart';

class NoteController with ChangeNotifier {
  List<NoteModel> _notes = [];
  List<NoteModel> get notes => _notes;

  Future<void> addToNote(String title, String content) async {
    try {
      await DBHelper.init();
      final newNote = NoteModel(
        id: DateTime.now().toString(),
        title: title,
        content: content,
      );
      _notes.add(newNote);
      notifyListeners();
      DBHelper.insert(
          'usernotes',
          NoteModel(
              id: newNote.id, title: newNote.title, content: newNote.content));
      notifyListeners();
      print(notes);
    } catch (e) {
      print(e);
    }
  }}

那么问题在哪里呢？我试图运行具有相同功能的其他项目，此错误没有显示