prefer-equatable-mixin

v1.32.0

warning

effort: 2m

has IDE fix

teams+

Warns when a class extends Equatable instead of mixing in the EquatableMixin.

There is no upside in extending Equatable, but using the mixin allows you to also extend another class while keeping all equatable features.

Example

❌ Bad:

// LINT: The class should mix in 'EquatableMixin' instead of extending 'Equatable'.
class Person extends Equatable {
  const Person(this.name);

  final String name;

  @override
  List<Object> get props => [name];
}

✅ Good:

class Person with EquatableMixin {
  const Person(this.name);

  final String name;

  @override
  List<Object> get props => [name];
}

Related Rules

• extend-equatable