我正在尝试创建形状不正确的对象并将其添加到数据库中。
我在调用函数之前打印了所有值，但都不为空。
这是我得到错误的地方
Exercise ex=new Exercise(name: name,description: description,type:inputType,mainMuscle: inputMainMuscle,equipment:equip,userCreated: 1);
_databaseHelper.addExercise(ex).then((exerciseid){
if(exerciseid!=0){
Navigator.pop(context);
}
}
这是我的功能：
Future<int> addExercise(Exercise exercise) async{
var db = await _getDatabase();
var sonuc = await db.insert("exercises", exercise.toMap());
return sonuc;
}
这是我的建设者：
Exercise({this.name,this.description='Henüz bir açıklama eklenmemiş ☹️',this.type, this.equipment,this.mainMuscle='Undefined',this.userCreated});
flutter: ══╡ EXCEPTION CAUGHT BY GESTURE ╞═══════════════════════════════════════════════════════════════════
flutter: The following NoSuchMethodError was thrown while handling a gesture:
flutter: The method 'addExercise' was called on null.
flutter: Receiver: null
flutter: Tried calling: addExercise(Instance of 'Exercise')
flutter:
flutter: When the exception was thrown, this was the stack:
flutter: #0 Object.noSuchMethod (dart:core-patch/object_patch.dart:51:5)
flutter: #1 _CreateExerciseState.build.<anonymous closure> (package:gymapp/view/viewmodels/createexercise.dart:99:34)
flutter: #2 _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:635:14)
flutter: #3 _InkResponseState.build.<anonymous closure> (package:flutter/src/material/ink_well.dart:710:32)
flutter: #4 GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:182:24)
flutter: #5 TapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:365:11)
flutter: #6 TapGestureRecognizer.handlePrimaryPointer (package:flutter/src/gestures/tap.dart:275:7)
flutter: #7 PrimaryPointerGestureRecognizer.handleEvent (package:flutter/src/gestures/recognizer.dart:467:9)
flutter: #8 PointerRouter._dispatch (package:flutter/src/gestures/pointer_router.dart:75:13)
flutter: #9 PointerRouter.route (package:flutter/src/gestures/pointer_router.dart:102:11)
flutter: #10 GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:218:19)
flutter: #11 GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:198:22)
flutter: #12 GestureBinding._handlePointerEvent (package:flutter/src/gestures/binding.dart:156:7)
flutter: #13 GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:102:7)
flutter: #14 GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:86:7)
flutter: #18 _invoke1 (dart:ui/hooks.dart:263:10)
flutter: #19 _dispatchPointerDataPacket (dart:ui/hooks.dart:172:5)
flutter: (elided 3 frames from package dart:async)
flutter:
flutter: Handler: "onTap"
flutter: Recognizer:
flutter: TapGestureRecognizer#225e0
flutter: ════════════════════════════════════════════════════════════════════════════════════════════════════