React Native - ExpoSQLite 无法在 iOS 上打开数据库

问题描述 投票：0回答：1

我正在尝试使用 

expo-sqlite
加载预先存在的数据库。它在 Android 上运行得很好，但在 iOS 上我遇到了一些问题。

我打开DB的代码如下：

return (
    <>
        <SQLiteProvider databaseName="@/data/products.db" assetSource={{ assetId: require('@/data/products.db') }}>
            <ResultRenderer profile={profile} />
            <Text>{buildSQLquery(profile)}</Text>
        </SQLiteProvider>
    </>
);

但是，在 iOS 上，这只会抛出：

ERROR  Error: The file “ExponentAsset-171a7c1e81bf6393675b790dec0140a7.db” doesn’t exist.
 
This error is located at:
    in SQLiteProviderNonSuspense (created by SQLiteProvider)
    in SQLiteProvider (created by RenderScreen)
    in RenderScreen
    in Unknown (created by Route((results)/results))
    in Suspense (created by Route((results)/results))
    in Route (created by Route((results)/results))
    in Route((results)/results) (created by SceneView)
    in StaticContainer
    in EnsureSingleNavigator (created by SceneView)
    in SceneView (created by SceneView)
    in RCTView (created by View)
    in View (created by DebugContainer)
    in DebugContainer (created by MaybeNestedStack)
    in MaybeNestedStack (created by SceneView)
    in RCTView (created by View)
    in View (created by SceneView)
    in RNSScreen (created by Animated(Anonymous))
    in Animated(Anonymous) (created by InnerScreen)
    in Suspender (created by Freeze)
    in Suspense (created by Freeze)
    in Freeze (created by DelayedFreeze)
    in DelayedFreeze (created by InnerScreen)
    in InnerScreen (created by Screen)
    in Screen (created by SceneView)
    in SceneView (created by NativeStackViewInner)
    in Suspender (created by Freeze)
    in Suspense (created by Freeze)
    in Freeze (created by DelayedFreeze)
    in DelayedFreeze (created by ScreenStack)
    in RNSScreenStack (created by ScreenStack)
    in ScreenStack (created by NativeStackViewInner)
    in NativeStackViewInner (created by NativeStackView)
    in RCTView (created by View)
    in View (created by SafeAreaProviderCompat)
    in SafeAreaProviderCompat (created by NativeStackView)
    in NativeStackView (created by NativeStackNavigator)
    in PreventRemoveProvider (created by NavigationContent)
    in NavigationContent
    in Unknown (created by NativeStackNavigator)
    in NativeStackNavigator
    in Unknown (created by RootLayout)
    in ThemeProvider (created by RootLayout)
    in RootLayout
    in Unknown (created by Route())
    in Suspense (created by Route())
    in Route (created by Route())
    in Route() (created by ContextNavigator)
    in RNCSafeAreaProvider (created by SafeAreaProvider)
    in SafeAreaProvider (created by wrapper)
    in wrapper (created by ContextNavigator)
    in EnsureSingleNavigator
    in BaseNavigationContainer
    in ThemeProvider
    in NavigationContainerInner (created by ContextNavigator)
    in ContextNavigator (created by ExpoRoot)
    in ExpoRoot (created by App)
    in App (created by ErrorOverlay)
    in ErrorToastContainer (created by ErrorOverlay)
    in ErrorOverlay (created by withDevTools(ErrorOverlay))
    in withDevTools(ErrorOverlay)
    in RCTView (created by View)
    in View (created by AppContainer)
    in RCTView (created by View)
    in View (created by AppContainer)
    in AppContainer
    in main(RootComponent), js engine: hermes

我不太知道这个文件名来自哪里，但我想知道如何解决这个问题。

我已经尝试使用此代码打开数据库：

const db = SQLite.openDatabaseSync("@/data/products.db", {});
const result = db.getAllSync("SELECT * from products")
console.log(result);

这奇怪地引发了另一个错误：

ERROR  Error: FunctionCallException: Calling the 'initSync' function has failed (at ExpoModulesCore/SyncFunctionDefinition.swift:87)
→ Caused by: ArgumentCastException: The 1st argument cannot be cast to type SharedObject<NativeDatabase> (at ExpoModulesCore/JavaScriptUtils.swift:61)
→ Caused by: NativeSharedObjectNotFoundException: Unable to find the native shared object associated with given JavaScript object (at ExpoModulesCore/DynamicSharedObjectType.swift:58)
 
This error is located at:
    in IntroScreen
    in Unknown (created by Route((intro)/index))
    in Suspense (created by Route((intro)/index))
    in Route (created by Route((intro)/index))
    in Route((intro)/index) (created by SceneView)
    in StaticContainer
    in EnsureSingleNavigator (created by SceneView)
    in SceneView (created by SceneView)
    in RCTView (created by View)
    in View (created by DebugContainer)
    in DebugContainer (created by MaybeNestedStack)
    in MaybeNestedStack (created by SceneView)
    in RCTView (created by View)
    in View (created by SceneView)
    in RNSScreen (created by Animated(Anonymous))
    in Animated(Anonymous) (created by InnerScreen)
    in Suspender (created by Freeze)
    in Suspense (created by Freeze)
    in Freeze (created by DelayedFreeze)
    in DelayedFreeze (created by InnerScreen)
    in InnerScreen (created by Screen)
    in Screen (created by SceneView)
    in SceneView (created by NativeStackViewInner)
    in Suspender (created by Freeze)
    in Suspense (created by Freeze)
    in Freeze (created by DelayedFreeze)
    in DelayedFreeze (created by ScreenStack)
    in RNSScreenStack (created by ScreenStack)
    in ScreenStack (created by NativeStackViewInner)
    in NativeStackViewInner (created by NativeStackView)
    in RCTView (created by View)
    in View (created by SafeAreaProviderCompat)
    in SafeAreaProviderCompat (created by NativeStackView)
    in NativeStackView (created by NativeStackNavigator)
    in PreventRemoveProvider (created by NavigationContent)
    in NavigationContent
    in Unknown (created by NativeStackNavigator)
    in NativeStackNavigator
    in Unknown (created by RootLayout)
    in ThemeProvider (created by RootLayout)
    in RootLayout
    in Unknown (created by Route())
    in Suspense (created by Route())
    in Route (created by Route())
    in Route() (created by ContextNavigator)
    in RNCSafeAreaProvider (created by SafeAreaProvider)
    in SafeAreaProvider (created by wrapper)
    in wrapper (created by ContextNavigator)
    in EnsureSingleNavigator
    in BaseNavigationContainer
    in ThemeProvider
    in NavigationContainerInner (created by ContextNavigator)
    in ContextNavigator (created by ExpoRoot)
    in ExpoRoot (created by App)
    in App (created by ErrorOverlay)
    in ErrorToastContainer (created by ErrorOverlay)
    in ErrorOverlay (created by withDevTools(ErrorOverlay))
    in withDevTools(ErrorOverlay)
    in RCTView (created by View)
    in View (created by AppContainer)
    in RCTView (created by View)
    in View (created by AppContainer)
    in AppContainer
    in main(RootComponent), js engine: hermes

我对此感到非常困惑 - 你知道解决这个问题的方法吗？

ios react-native sqlite expo expo-sqlite
1个回答
0
投票

我已经能够解决这个问题了。

如果遇到这种情况，你需要这样做：

  1. 创建文件“metro.config.js”（如果尚不存在）
  2. 将此代码写入文件或以某种方式将“db”字符串（或任何用作数据库扩展的内容）添加到模块导出中
    resolver.assetExts
    数组：
const { getDefaultConfig } = require("expo/metro-config");

const config = getDefaultConfig(__dirname);

config.resolver.assetExts.push(
    // Adds support for `.db` files for SQLite databases
    "db"
);

module.exports = config;
  1. 确保您的数据库位于项目的 
    assets
    文件夹内
  2. 仅将值 
    databaseName
    更改为文件名 - 而不是整个路径！以我的例子来说，它看起来像这样：
<SQLiteProvider databaseName="products.db" assetSource={{ assetId: require('@/assets/databases/products.db') }}>
    <ResultRenderer parsedProfile={parsedProfile} parsedFilter={parsedFilter} />
</SQLiteProvider>

我希望这对其他人有帮助。

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