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overridden_fields

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Don't override fields.

Details

#

DON'T override fields.

Overriding fields is almost always done unintentionally. Regardless, it is a bad practice to do so.

BAD:

dart
class Base {
  Object field = 'lorem';

  Object something = 'change';
}

class Bad1 extends Base {
  @override
  final field = 'ipsum'; // LINT
}

class Bad2 extends Base {
  @override
  Object something = 'done'; // LINT
}

GOOD:

dart
class Base {
  Object field = 'lorem';

  Object something = 'change';
}

class Ok extends Base {
  Object newField; // OK

  final Object newFinal = 'ignore'; // OK
}

GOOD:

dart
abstract class BaseLoggingHandler {
  Base transformer;
}

class LogPrintHandler implements BaseLoggingHandler {
  @override
  Derived transformer; // OK
}

Enable

#

To enable the overridden_fields rule, add overridden_fields under linter > rules in your analysis_options.yaml file:

analysis_options.yaml
yaml
linter:
  rules:
    - overridden_fields

If you're instead using the YAML map syntax to configure linter rules, add overridden_fields: true under linter > rules:

analysis_options.yaml
yaml
linter:
  rules:
    overridden_fields: true

Unless stated otherwise, the documentation on this site reflects Dart 3.8.1. Page last updated on 2025-03-07. View source or report an issue.