Flutter where and firstwhere methods is calls null with data from provider

Question

First is is getting null in HomeScreen

Here is the code:

final providedList = Provider.of<List<category.List>>(
  context,
);

appbarColor = providedList
    .firstWhere(
      (element) => element.name == currentListName,
     orElse: () => providedList.first,
    )
    .color;

Here is the error

The method 'firstWhere' was called on null. Receiver: null Tried calling: firstWhere(Closure: (List) => bool, orElse: Closure: () => List)

then HomeBody

Here is the code:

List<Todo> todos = context.watch<List<Todo>>()
        .where((e) =>
            e.category == widget.selectedCategory && e.isCompleted == false)
        .toList() ??
    [];

Here is the error

The method 'where' was called on null. Receiver: null Tried calling: where(Closure: (Todo) => bool) The relevant error-causing widget was HomeBody

and each error code prints twice

question from:https://stackoverflow.com/questions/65844986/flutter-where-and-firstwhere-methods-is-calls-null-with-data-from-provider

Answer 1

Waitting for answers