I develop my application with Dart and Polymer on PyCharm. I currently have an error :
Exception: type 'ObservableList<DrugFilterItem>' is not a subtype of type 'ObservableList<DrugCompareItem>' of '__$orderFilterList@51385934' ObservableList is from package:observe/src/observable_list.dart DrugFilterItem is from package:synmed/drug_elements/views/drug_filter_menu.dart ObservableList is from package:observe/src/observable_list.dart DrugCompareItem is from package:synmed/drug_elements/views/drug_search_toolbar.dart
DrugFilterItem and DrugCompareItem are both custom classes, DrugCompareItem extends DrugFilterItem, and the line designed by the error is :
ObservableList<DrugCompareItem> orderFilterList = new ObservableList<DrugFilterItem>();
The problem suddenly happened today : I installed Pycharm 2016.3 and tried to code, but I had an error with the package shadow, which I solved. Since, I have this error which I supposed came from a problem with the packages as the code didn’t change from before to after.
What I have found for now is nothing in fact, I read a lot of post on this kind of error, one of the recurrent subject was the imports but I didn’t find any problem with this. I am using Dart 1.20.1 and
polymer: "<=0.16.4+1" core_elements: "<=0.7.1+3" paper_elements: "<=0.7.1"
Do anyone has any clue for me? Thanks!
I believe this is working as intended. A List is not assignable to a List, even if it only contains Apples.
There are several ways to work around this:
iterable.map((x) => x) (removing the generic type), new List<MethodMirror>.from(iterable) new MyIterableWrapper<MethodMirror>(iterable) (where the iterable-wrapper that would need to be written).
Answered By – Günter Zöchbauer
Answer Checked By – Robin (FlutterFixes Admin)