Response<double> get error when got int

[a43mrk]

Hello i got an error that Dio cannot cast integer numbers to double, in this end-point its supposed to return only float numbers. but he returns to integers :( this code was generated by retrofit and the author said to post here, because he don't want to make any changes on the generator.
The error occurs the respose is assigned.

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Issue Info

Info	Value
Platform Name	e.g. flutter / ios / android	all
Platform Version	e.g. 1.5.0 / 12.0 / 9.0	13.0
Dio Version	e.g. 2.1.0 / 1.0.17	3.x
Android Studio / Xcode Version	e.g. Android Studio 3.3.2 / Xcode 10.2.1	Xcode 11
Repro rate	e.g. all the time (100%) / sometimes x% / only once	100%
Repro with our demo prj	e.g. does it happen with our demo project?	x
Demo project link	e.g. link to a demo project that highlights the issue	x

 getFooBarById(id) async {
   ArgumentError.checkNotNull(id, 'id');
   const _extra = <String, dynamic>{};
   final queryParameters = <String, dynamic>{};
   final _data = <String, dynamic>{};
   final Response<double> _result = await _dio.request('/foo/barById/$id',
       queryParameters: queryParameters,
       options: RequestOptions(
           method: 'GET',
           headers: <String, dynamic>{},
           extra: _extra,
           baseUrl: baseUrl),
       data: _data);
   final value = _result.data;
   return Future.value(value);
 }

Exception has occurred.
DioError (DioError [DioErrorType.DEFAULT]: type 'int' is not a subtype of type 'double'
#0 DioMixin.assureResponse (package:dio/src/dio.dart:1138:9)
#1 DioMixin._request. (package:dio/src/dio.dart:904:14)
#2 _rootRunUnary (dart:async/zone.dart:1134:38)
#3 _CustomZone.runUnary (dart:async/zone.dart:1031:19)
#4 _FutureListener.handleValue (dart:async/future_impl.dart:139:18)
#5 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:680:45)
#6 Future._propagateToListeners (dart:async/future_impl.dart:709:32)
#7 Future._complete (dart:async/future_impl.dart:514:7)
#8 _SyncCompleter.complete (dart:async/future_impl.dart:53:12)
#9 Future.any. (dart:async/future.dart:459:45)
#10 _rootRunUnary (dart:async/zone.dart:1134:38)
#11 _CustomZone.runUnary (dart:async/zone.dart:1031:19)
#12 _FutureListener.handleValue (dart:async/future_impl.dart:139:18)
#13 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:680:45)
#14 Future._propagateToListeners (dart:async/future_impl.dart:709:32)
#15 Future._completeWithValue (dart:async/future_impl.dart:524:5)
#16 Future._asyncComplete. (dart:async/future_impl.dart:554:7)
#17 _rootRun (dart:async/zone.dart:1126:13)
#18 _CustomZone.run (dart:async/zone.dart:1023:19)
#19 _CustomZone.runGuarded (dart:async/zone.dart:925:7)
#20 _CustomZone.bindCallbackGuarded. (dart:async/zone.dart:965:23)
#21 _microtaskLoop (dart:async/schedule_microtask.dart:43:21)
#22 _startMicrotaskLoop (dart:async/schedule_microtask.dart:52:5)

[stale]

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[a43mrk]

hellow! is Dio alive?

[josephcrowell]

I just changed my code based on the http library to dio. Under http, doubles with a precision of 0 like 153.000000 were correctly created as a double type per the dart standard, but in dio, any whole number double is instead converted to an integer. This violates the way doubles are supposed to work in Flutter/Dart and your json parser needs to be fixed to handle whole number doubles correctly.