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I have problem in my code
I am creating a project of your own project. I am getting requests from the server. But when I want to amend the request, the server returns the data correctly, but the data is not returned to the modification page. This error returns i am using asp web api
Instance of 'APIResponse'
`Future<APIResponse> getOrder(String orderId) {
return http.get(url + '/Order/'+orderId, headers: {
'Authorization':authorization
}).then((data) {
if (data.statusCode == 200) {
print(data.body);
final jsonData = json.decode(data.body);
return APIResponse(data: Order.fromJson(jsonData));
// return APIResponse(data: Order.fromJson(jsonData).driverName);
}
return APIResponse(error: true, errorMessage: "حدث ");
// return APIResponse<List>(error: true, errorMessage: "حدث خطا");
})
.catchError((e)=>APIResponse(error: true, errorMessage: "حدث "));
}`
V/AudioManager( 5802): playSoundEffect effectType: 0
V/AudioManager( 5802): querySoundEffectsEnabled...
E/flutter ( 5802): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: NoSuchMethodError: The getter 'orderNumber' was called on null.
E/flutter ( 5802): Receiver: null
E/flutter ( 5802): Tried calling: orderNumber
�[38;5;244mE/flutter ( 5802): #0 Object.noSuchMethod (dart:core-patch/object_patch.dart:53:5)�[39;49m
�[38;5;248mE/flutter ( 5802): #1 _OrderModify.initState.�[39;49m
�[38;5;244mE/flutter ( 5802): #2 _rootRunUnary (dart:async/zone.dart:1134:38)�[39;49m
�[38;5;244mE/flutter ( 5802): #3 _CustomZone.runUnary (dart:async/zone.dart:1031:19)�[39;49m
�[38;5;244mE/flutter ( 5802): #4 _FutureListener.handleValue (dart:async/future_impl.dart:139:18)�[39;49m
�[38;5;244mE/flutter ( 5802): #5 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:680:45)�[39;49m
�[38;5;244mE/flutter ( 5802): #6 Future._propagateToListeners (dart:async/future_impl.dart:709:32)�[39;49m
�[38;5;244mE/flutter ( 5802): #7 Future._completeWithValue (dart:async/future_impl.dart:524:5)�[39;49m
�[38;5;244mE/flutter ( 5802): #8 _AsyncAwaitCompleter.complete (dart:async-patch/async_patch.dart:32:15)�[39;49m
�[38;5;244mE/flutter ( 5802): #9 _completeOnAsyncReturn (dart:async-patch/async_patch.dart:290:13)�[39;49m
E/flutter ( 5802): #10 _withClient (package:http/http.dart)
E/flutter ( 5802):
�[38;5;248mE/flutter ( 5802): #11 get�[39;49m
�[38;5;248mE/flutter ( 5802): #12 OrderService.getOrders�[39;49m
�[38;5;248mE/flutter ( 5802): #13 _OrderModify.initState�[39;49m
�[38;5;244mE/flutter ( 5802): #14 StatefulElement._firstBuild�[39;49m
�[38;5;244mE/flutter ( 5802): #15 ComponentElement.mount�[39;49m
�[38;5;244mE/flutter ( 5802): #16 Element.inflateWidget�[39;49m
�[38;5;244mE/flutter ( 5802): #17 Element.updateChild�[39;49m
�[38;5;244mE/flutter ( 5802): #18 SingleChildRenderObjectElement.mount�[39;49m
�[38;5;244mE/flutter ( 5802): #19 Element.inflateWidget�[39;49m
�[38;5;244mE/flutter ( 5802): #20 Element.updateChild�[39;49m
�[38;5;244mE/flutter ( 5802): #21 ComponentElement.performRebuild�[39;49m
�[38;5;244mE/flutter ( 5802): #22 Element.rebuild�[39;49m
�[38;5;244mE/flutter ( 5802): #23 ComponentElement._firstBuild�[39;49m
�[38;5;244mE/flutter ( 5802): #24 ComponentElement.mount�[39;49m
�[38;5;244mE/flutter ( 5802): #25 Element.inflateWidget�[39;49m
�[38;5;244mE/flutter ( 5802): #26 Element.updateChild�[39;49m
�[38;5;244mE/flutter ( 5802): #27 SingleChildRenderObjectElement.mount�[39;49m
�[38;5;244mE/flutter ( 5802): #28 Element.inflateWidget�[39;49m
�[38;5;244mE/flutter ( 5802): #29 Element.updateChild�[39;49m
�[38;5;244mE/flutter ( 5802): #30 SingleChildRenderObjectElement.mount�[39;49m
�[38;5;244mE/flutter ( 5802): #31 Element.inflateWidget�[39;49m
�[38;5;244mE/flutter ( 5802): #32 Element.updateChild�[39;49m
�[38;5;244mE/flutter ( 5802): #33 ComponentElement.performRebuild�[39;49m
�[38;5;244mE/flutter ( 5802): #34 Element.rebuild�[39;49m
�[38;5;244mE/flutter ( 5802): #35 ComponentElement._firstBuild�[39;49m
�[38;5;244mE/flutter ( 5802): #36 StatefulElement._firstBuild�[39;49m
�[38;5;244mE/flutter ( 5802): #37 ComponentElement.mount�[39;49m
�[38;5;244mE/flutter ( 5802): #38 Element.inflateWidget�[39;49m
�[38;5;244mE/flutter ( 5802): #39 Element.updateChild�[39;49m
�[38;5;244mE/flutter ( 5802): #40 SingleChildRenderObjectElement.mount�[39;49m
�[38;5;244mE/flutter ( 5802): #41 Element.inflateWidget�[39;49m
�[38;5;244mE/flutter ( 5802): #42 Element.updateChild�[39;49m
�[38;5;244mE/flutter ( 5802): #43 SingleChildRenderObjectElement.mount�[39;49m
�[38;5;244mE/flutter ( 5802): #44 Element.inflateWidget�[39;49m
�[38;5;244mE/flutter ( 5802): #45 Element.updateChild�[39;49m
�[38;5;244mE/flutter ( 5802): #46 ComponentElement.performRebuild�[39;49m
E/flutter ( 5802): #47 Ele
W/InputMethodManager( 5802): startInputReason = 8
W/IInputConnectionWrapper( 5802): getExtractedText on inactive InputConnection
W/IInputConnectionWrapper( 5802): getTextBeforeCursor on inactive InputConnection
D/ZrHung.AppEyeUiProbe( 5802): stop checker.
W/libEGL ( 5802): EGLNativeWindowType 0x78b9e4d010 disconnect failed
D/ViewRootImplMainActivity: surface should not be released
D/FlutterView( 5802): Detaching from a FlutterEngine: io.flutter.embedding.engine.FlutterEngine@cbc37e7
W/InputMethodManager( 5802): startInputReason = 3
I/ViewRootImpl( 5802): jank_removeInvalidNode all the node in jank list is out of time
W/IInputConnectionWrapper( 5802): getExtractedText on inactive InputConnection
W/IInputConnectionWrapper( 5802): getTextBeforeCursor on inactive InputConnection
W/libEGL ( 5802): EGLNativeWindowType 0x78b9e4e010 disconnect failed
V/ActivityThread( 5802): Handle window ActivityRecord{a45ce8 token=android.os.BinderProxy@3356eca {com.example.request_order/com.example.request_order.MainActivity}} visibility: false
D/ZrHung.AppEyeUiProbe( 5802): Current Activity:false
D/ZrHung.AppEyeUiProbe( 5802): not watching, wait.
E/ ( 5802): [ZeroHung]zrhung_get_config: Get config failed for wp[0x0008]
Issues with 'null' values (project: flutter_rest_api)
Excellent example and tutorial! Thanks for sharing it. However, I'm having error messages related to non-null values in the 'note_for_listing.dart' that does not allow the app to run. Only if I make the parameters 'required' it works. But then, other issues comes in the 'note_modify.dart'.
error: The parameter 'noteTitle' can't have a value of 'null' because of its type, but the implicit default value is 'null'. (missing_default_value_for_parameter at [startup_namer] lib\models\note_for_listing.dart:8)
error: The parameter 'noteID' can't have a value of 'null' because of its type, but the implicit default value is 'null'. (missing_default_value_for_parameter at [startup_namer] lib\views\note_modify.dart:12)
I suspect it has to do with the non-null safety feature in flutter but not sure. Any recommendations?
Thanks for the help!
Programming-Addict-Code-Examples/flutter_rest_api/part 1/notes/
Unable to open projects
I can't get any of the projects to open. They have multiple errors such as
import 'package:flutter/material.dart' - Target of URI does not exist.
There are many OmniSharp errors such as
Unable to resolve 'AutoMapper (>= 9.0.0)' for '.NETCoreApp,Version=v3.1'.
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