Encountered some issues

[noumi92]

Encountered following bugs and applied undermentioned fixes

items were not initialized -> initialized as empty list
static List<Item> items = List.empty();
required field missing in Item() constructor -> added required keyword
Item({required this.id, ....});
Null safety found missing in copyWith()
Item copyWith({ String? id ...
In factory fromMap() the line which checks map nullability throwing error -> commented
//if (map == null) return null;
In home.dart list was not mapping to model -> distributed into two assignments
List<Item> list = List.from(productsData)
.map<Item>((item) => Item.fromMap(item))
.toList();
CatalogModel.items = list;

[noumi92]

I am just a beginner. It is not to criticize rather to get help and learn more.