2

错误

[ERROR:flutter/lib/ui/ui_dart_state.cc(177)] Unhandled Exception: SqliteException(14): bad parameter or other API misuse, bad parameter or other API misuse (code 21)
#0      new DatabaseImpl.open (package:sqlite3/src/impl/database.dart:53:7)
#1      Sqlite3.open (package:sqlite3/src/api/sqlite3.dart:51:25)
#2      _VmDelegate.open (package:moor/src/ffi/vm_database.dart:126:21)
#3      DelegatedDatabase.ensureOpen.<anonymous closure> (package:moor/src/runtime/executor/helpers/engines.dart:255:22)
<asynchronous suspension>
#4      BasicLock.synchronized (package:synchronized/src/basic_lock.dart:34:18)
<asynchronous suspension>
#5      QueryEngine.doWhenOpened.<anonymous closure> (package:moor/src/runtime/api/query_engine.dart)
<asynchronous suspension>

数据库路径

C:\Users\fosan\Documents\db.sqlite

环境

  • 停泊：^3.4.0
  • sqlite3_flutter_libs：^0.3.0
  • 路径提供者：^1.6.24
  • 路径：^1.7.0
  • build_runner：^1.10.11
  • moor_generator: ^3.4.0
  • 项目根路径中的 sqlite3.dll -“使用 sqlite3 版本（libVersion：3.34.0，sourceId：2020-12-01 16:14:00 a26b6597e3ae272231b96f9982c3bcc17ddec2f2b6eb4df06a224b91089fed5b，编号：3034000）”

扑医生

[√] Flutter (Channel dev, 1.26.0-1.0.pre, on Microsoft Windows [Version 10.0.19613.1005],
    locale pt-BR)
    • Flutter version 1.26.0-1.0.pre at C:\tools\flutter
    • Framework revision 63062a6443 (8 days ago), 2020-12-13 23:19:13 +0800
    • Engine revision 4797b06652
    • Dart version 2.12.0 (build 2.12.0-141.0.dev)

[√] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
    • Android SDK at C:\Users\fosan\AppData\Local\Android\sdk
    • Platform android-30, build-tools 30.0.3
    • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)
    • All Android licenses accepted.

[√] Visual Studio - develop for Windows (Visual Studio Community 2019 16.8.3)
    • Visual Studio at C:\Program Files (x86)\Microsoft Visual Studio\2019\Community
    • Visual Studio Community 2019 version 16.8.30804.86
    • Windows 10 SDK version 10.0.18362.0

[√] Android Studio (version 4.1.0)
    • Android Studio at C:\Program Files\Android\Android Studio
    • Flutter plugin can be installed from:
       https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
       https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)

[√] Connected device (1 available)
    • Windows (desktop) • windows • windows-x64 • Microsoft Windows [Version
      10.0.19613.1005]

• No issues found!

代码

import 'dart:ffi';
import 'dart:io';

...
import 'package:flutter/material.dart';
import 'package:sqlite3/open.dart';
import 'package:window_size/window_size.dart';

void main() {
  open.overrideFor(OperatingSystem.windows, _openOnWindows);
  ...
  runApp(const App(appName: appName));
}

DynamicLibrary _openOnWindows() {
  final sqlite3LibraryPath = join(Platform.script.toFilePath(), 'sqlite3.dll');
  return DynamicLibrary.open(sqlite3LibraryPath);
}

import 'dart:io';

import 'package:moor/ffi.dart';
import 'package:moor/moor.dart';
import 'package:path/path.dart' as p;
import 'package:path_provider/path_provider.dart';

part 'local_database.g.dart';

@UseMoor(tables: [ClientsTable])
class LocalDatabase extends _$LocalDatabase {
  LocalDatabase() : super(_openConnection());

  @override
  int get schemaVersion => 1;

  Future<int> addClient(ClientRow newClient) =>
      into(clientsTable).insert(newClient);

  Stream<List<ClientRow>> get watchAllClients => select(clientsTable).watch();

  Future<int> deleteClient(int id) =>
      (delete(clientsTable)..where((tbl) => tbl.id.equals(id))).go();
}

LazyDatabase _openConnection() {
  return LazyDatabase(() async {
    final dbFolder = await getApplicationDocumentsDirectory();
    final file = File(p.join(dbFolder.path, 'db.sqlite'));
    return VmDatabase(file);
  });
}

@DataClassName("ClientRow")
class ClientsTable extends Table {
  IntColumn get id => integer().autoIncrement()();

  TextColumn get name => text()();

  TextColumn get phone => text()();

  TextColumn get street => text()();

  TextColumn get number => text()();

  TextColumn get city => text()();

  TextColumn get neighborhood => text()();

  TextColumn get uf => text()();

  TextColumn get reference => text()();
}
4

2 回答 2

0

我的问题是两件事，都与写权限有关。第一个问题是我的应用程序项目在Desktop文件夹下，第二个问题是await getApplicationDocumentsDirectory();返回的Documents文件夹。

为我解决的问题是在项目的同一文件夹中创建数据库并将项目文件夹本身移动到 C:\StudioProjects

于 2020-12-23T16:30:57.483 回答
0

应该使用 sqflite: ^1.3.0 而不是 sqlite3_flutter_libs: ^0.3.0

于 2020-12-23T09:30:55.803 回答