Flutter：未处理的异常：类型“（动态）=> void”不是“动作”类型“（字符串，动态）=> void”的子类型

Question

Full Error:

`E/flutter (15265): [ERROR:flutter/lib/ui/ui_dart_state.cc(198)] Unhandled Exception: type '(dynamic) => void' is not a subtype of type '(String, dynamic) => void' of 'action' E/flutter (15265): #0 OrderController.getOrderDetails (package:mart/controller/order_controller.dart:117:23) E/flutter (15265): E/flutter (15265): D/ViewRootImplMainActivity: windowFocusChanged hasFocus=false inTouchMode=true

error:

Future<List<OrderDetailsModel>> getOrderDetails(String orderID) async {
    _orderDetails = null;
    _isLoading = true;
    _showCancelled = false;

    if(_trackModel == null || _trackModel.orderType != 'parcel') {
      Response response = await orderRepo.getOrderDetails(orderID);
      _isLoading = false;
      if (response.statusCode == 200) {
        _orderDetails = [];
        response.body.forEach((orderDetail) => _orderDetails.add(OrderDetailsModel.fromJson(orderDetail)));
      } else {
        ApiChecker.checkApi(response);
      }
    }else {
      _isLoading = false;
      _orderDetails = [];
    }

UPDATE

void _loadData(BuildContext context, bool reload) async {
    await Get.find<OrderController>().trackOrder(widget.orderId.toString(), reload ? null : widget.orderModel, false);
    if(widget.orderModel == null) {
      await Get.find<SplashController>().getConfigData();
    }
    Get.find<OrderController>().getOrderDetails(widget.orderId.toString());
  }

Answer 1

Your issue is in forEach in your getOrderDetails, you are doing it in wrong way.your json response is a map and map has key , value property

response.body.forEach((key, value) => _orderDetails.add(OrderDetailsModel.fromJson(value)));