从firebase数据库读取数据时遇到问题。
下面的代码属于附加到[FlatButton]的函数：
@media (max-width: 800px) {
.page{
&__main-content {
width: 100% !important;
}
}
}
每当我运行这段代码时，都会出现此错误：
{
"CustomerID": {"value": "ABARTENDE"},
"Details":
[
{
"InventoryID": {"value": "AACOMPUT01"},
"OrderQty": {"value": 5}
},
{
"InventoryID": {"value": "AALEGO500"},
"OrderQty": {"value": 50}
}
]
}
至于数据库的路径是void newEntry(){
print(_database.reference().child('todo').equalTo('Dan').once().then((value){
print(value.key);
}));
}
Database。
编辑：忘记提及我更新了我的安全规则，如下所示：
I/flutter (29847): Instance of 'Future<dynamic>'
D/NetworkSecurityConfig(29847): No Network Security Config specified, using platform default
W/SyncTree(29847): Listen at /todo failed: DatabaseError: Permission denied
E/flutter (29847): [ERROR:flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exception: Instance of 'DatabaseError'
E/flutter (29847): #0 Query.once (package:firebase_database/src/query.dart:90:41)
E/flutter (29847): <asynchronous suspension>
E/flutter (29847): #1 _MyAppState.newEntry (package:database_project/main.dart:94:62)
E/flutter (29847): #2 _MyAppState._buildButton.<anonymous closure> (package:database_project/main.dart:88:9)
E/flutter (29847): #3 _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:511:14)
E/flutter (29847): #4 _InkResponseState.build.<anonymous closure> (package:flutter/src/material/ink_well.dart:566:30)
E/flutter (29847): #5 GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:166:24)
E/flutter (29847): #6 TapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:240:9)
E/flutter (29847): #7 TapGestureRecognizer.handlePrimaryPointer (package:flutter/src/gestures/tap.dart:177:9)
E/flutter (29847): #8 PrimaryPointerGestureRecognizer.handleEvent (package:flutter/src/gestures/recognizer.dart:436:9)
E/flutter (29847): #9 PointerRouter._dispatch (package:flutter/src/gestures/pointer_router.dart:73:12)
E/flutter (29847): #10 PointerRouter.route (package:flutter/src/gestures/pointer_router.dart:101:11)
E/flutter (29847): #11 _WidgetsFlutterBinding&BindingBase&GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:221:19)
E/flutter (29847): #12 _WidgetsFlutterBinding&BindingBase&GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:199:22)chEvent (package:flutter/src/gestures/binding.dart:199:22) ePointerEvent (package:flutter/src/gestures/binding.dart:156:7)
E/flutter (29847): #13 _WidgetsFlutterBinding&BindingBase&GestureBinding._handlPointerEventQueue (package:flutter/src/gestures/binding.dart:102:7)ePointerEvent (package:flutter/src/gestures/binding.dart:156:7) ePointerDataPacket (package:flutter/src/gestures/binding.dart:86:7)
E/flutter (29847): #14 _WidgetsFlutterBinding&BindingBase&GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:102:7)
E/flutter (29847): #15 _WidgetsFlutterBinding&BindingBase&GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:86:7)
E/flutter (29847): #16 _rootRunUnary (dart:async/zone.dart:1136:13)
E/flutter (29847): #17 _CustomZone.runUnary (dart:async/zone.dart:1029:19)
E/flutter (29847): #18 _CustomZone.runUnaryGuarded (dart:async/zone.dart:931:7) ity]
E/flutter (29847): #19 _invoke1 (dart:ui/hooks.dart:233:10)
E/flutter (29847): #20 _dispatchPointerDataPacket (dart:ui/hooks.dart:154:5) w{8084b2a VFE...... .F...... 0,0-1440,2872} of ViewRootImpl@b8c6359[MainActivity]
E/flutter (29847): t/com.example.database_project.MainActivity@8084b2a@0[29847])/@0xeeafd1b io.flutter.view.FlutterView{8084b2a VFE.D/ViewRootImpl@b8c6359[MainActivity](29847): MSG_WINDOW_FOCUS_CHANGED 0 1
D/InputMethodManager(29847): prepareNavigationBarInfo() DecorView@48d0f7a[MainActivew{8084b2a VFE...... .F...... 0,0-1440,2872}ity]
D/InputMethodManager(29847): getNavigationBarColor() -855310D/SurfaceView(29847): onWindowVisibilityChanged(8) false io.flutter.view.FlutterView{8084b2a VFE...... .F...... 0,0-1440,2872} of ViewRootImpl@b8c6359[MainActivity]D/SurfaceView(29847): show() Surface(name=SurfaceView - com.example.database_project/com.example.database_project.MainActivity@8084b2a@0[29847])/@0xeeafd1b io.flutter.view.FlutterView{8084b2a VFE...... .F...... 0,0-1440,2872}D/SurfaceView(29847): surfaceDestroyed callback.size 1 #2 io.flutter.view.FlutterView{8084b2a VFE...... .F...... 0,0-1440,2872}W/libEGL (29847): EGLNativeWindowType 0x7af3edd010 disconnect failed
D/SurfaceView(29847): destroy() Surface(name=SurfaceView - com.example.database_project/com.example.database_project.MainActivity@8084b2a@0[29847])/@0xeeafd1b io.flutter.view.FlutterView{8084b2a VFE...... .F...... 0,0-1440,2872}W/libEGL (29847): EGLNativeWindowType 0x7b02e2a010 disconnect failedD/OpenGLRenderer(29847): eglDestroySurface = 0x7af3f13680, 0x7b02e2a000D/ViewRootImpl@b8c6359[MainActivity](29847): Relayout returned: old=[0,0][1440,3040] new=[0,0][1440,3040] result=0x5 surface={valid=false 0} changed=trueD/ViewRootImpl@b8c6359[MainActivity](29847): setWindowStopped(true) old=false
D/SurfaceView(29847): windowStopped(true) false io.flutter.view.FlutterView{8084b2a VFE...... .F...... 0,0-1440,2872} of ViewRootImpl@b8c6359[MainActivity]
D/ViewRootImpl@b8c6359[MainActivity](29847): Surface release. android.view.WindowManagerGlobal.setStoppedState:669 android.app.Activity.performStop:7647 android.app.ActivityThread.callActivityOnStop:4372 android.app.ActivityThread.performStopActivityInner:4350 android.app.ActivityThread.handleStopActivity:4425 android.app.servertransaction.StopActivityItem.execute:41 android.app.servertransaction.TransactionExecutor.executeLifecycleState:145 android.app.servertransaction.TransactionExecutor.execute:70
D/InputTransport(29847): Input channel destroyed: fd=100
I/FirebaseAuth(29847): [FirebaseAuth:] Loading module via FirebaseOptions.I/FirebaseAuth(29847): [FirebaseAuth:] Preparing to create service connection to gms implementation
编辑
根据@Andrey Ilyunin的评论，我已经向用户验证了我的应用程序并应用了相同的安全规则。我仍然遇到相同的异常，即：
todo/userId/Dan