avoid-unnecessary-getter

v1.10.0

style

configurable

pro+

Warns when a getter provides access to an existing final field without any additional logic.

⚙️ Config

Set ignore-upcast (default is true) to ignore getters with the different return type than the referenced field (example).

analysis_options.yaml

dart_code_metrics:
  rules:
    - avoid-unnecessary-getter:
        ignore-upcast: true

Example

❌ Bad:

abstract class PageRoute<T> extends ModalRoute<T> {
  PageRoute();

  // LINT: Unnecessary getter.
  //  Try replacing it with an existing field declaration and making it public.
  @override
  bool get barrierDismissible => _barrierDismissible;
  final _barrierDismissible = false;
}

✅ Good:

abstract class PageRoute<T> extends ModalRoute<T> {
  PageRoute();

  @override
  final barrierDismissible = false; // Correct, public immutable field instead

  String? _contents;
  String? get contents => _contents;
  set contents(String? value) {
    _contents = value;
  }
}

Example with "ignore-upcast"

Config

analysis_options.yaml

dart_code_metrics:
  rules:
    - avoid-unnecessary-getter:
        ignore-upcast: false

❌ Bad:

class SomeClass {
  final List<String>? _list;
  // LINT: Unnecessary getter.
  //  Try replacing it with an existing field declaration and making it public.
  Iterable<String> get list => _list;
}