May NyPullToRefresh could be better

[jitendravn]

My Data

{
data: []
pagination: {total: 15, count: 0, per_page: 10, current_page: 3, last_page: 2, hasMorePages: false}
}

Your widget error that i occured

[ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: Null check operator used on a null value
E/flutter (24138): #0 _NyPullToRefreshState._onLoading (package:nylo_support/widgets/ny_pull_to_refresh.dart:161:16)

and here is code your where the error occured

_onLoading() async {
    _iteration++;
    List<T>? newData = await widget.data(_iteration);
    if (newData == null) _refreshController.loadNoData();
    if (newData!.isEmpty) {
      _refreshController.loadNoData();
      return;
    }

    _data.addAll(newData);

    if (mounted) {
      setState(() {});
    }
    _refreshController.loadComplete();
  }

May be you could check for runtime type then

check for nullable to is empty or length
so may be could be better for those kind data
i have pasted above

here is and i get while using ny_pull_to_refresh

[agordn52]

Hi @jitendravn,

Can you share your complete code?
I'm struggling to see the error.

Thanks

[jitendravn]

I have received these data from the server

{
data: []
pagination: {total: 15, count: 0, per_page: 10, current_page: 3, last_page: 2, hasMorePages: false}
}

and I'm using your PullToRefresh Widget

please see your ny_pull_to_refresh.dart
file
line not exactly but may its
156

  _onLoading() async {
    _iteration++;

    List<T>? newData = await widget.data(_iteration);
    if (newData == null) _refreshController.loadNoData();
    if (newData!.isEmpty) {
      _refreshController.loadNoData();
      return;
    }

    _data.addAll(newData);

    if (mounted) {
      setState(() {});
    }
    _refreshController.loadComplete();
  }

[agordn52]

Hi @jitendravn,

The NyPullToRefresh widget expects a return type of List in the data parameter.
You should modify your code to this.

data: (int iteration) async {
   YourDataType userCall = await api<HomePageApiService>((request) async => request.userCalllogs(iteration));
   return userCall.data;
},

Hope that helps.