watchRelated<P extends DatumEntityInterface, R extends DatumEntityInterface> method

Implementation

Stream<List<R>>? watchRelated<P extends DatumEntityInterface, R extends DatumEntityInterface>(
  P parent,
  String relationName,
) {
  // Type-safe check using sealed class pattern matching
  switch (parent) {
    case RelationalDatumEntity():
      return Datum.managerByType(parent.runtimeType).watchRelated<R>(parent, relationName);
    case _:
      throw ArgumentError(
        'Entity of type ${parent.runtimeType} is not relational and cannot have relations. '
        'To use relations, extend RelationalDatumEntity instead of DatumEntity or use RelationalDatumEntityMixin to use `with` block.',
      );
  }
}