We have recently migrated our app to null safety and now our SearchDelegate is returning the below error
'AddressSearch.buildResults' ('Widget? Function(BuildContext)') isn't a valid override of 'SearchDelegate.buildResults' ('Widget Function(BuildContext)').
It seems to be related to the results but we cannot see how this changed since going to null safety
class AddressSearch extends SearchDelegate<Suggestion?> {
AddressSearch(this.sessionToken) {
apiClient = PlaceApiProvider(sessionToken);
}
final String sessionToken;
late PlaceApiProvider apiClient;
@override
String get searchFieldLabel => 'Enter Task Suburb';
@override
List<Widget> buildActions(BuildContext context) {
return [
query.isNotEmpty
? IconButton(
tooltip: 'Clear',
icon: const Icon(Icons.clear),
onPressed: () {
query = '';
},
)
: const SizedBox()
];
}
@override
Widget buildLeading(BuildContext context) {
return IconButton(
tooltip: 'Back',
icon: Icon(Icons.adaptive.arrow_back, color: Colors.black),
onPressed: () {
close(context, null);
},
);
}
@override
Widget? buildResults(BuildContext context) {
return Text(query);
}
@override
Widget buildSuggestions(BuildContext context) {
return FutureBuilder(
future: query.isEmpty
? null
: apiClient.fetchSuggestions(
query, Localizations.localeOf(context).languageCode),
builder: (context, AsyncSnapshot snapshot) => query.isEmpty
? Container(
padding: const EdgeInsets.all(16.0),
child: const Text(''),
)
: snapshot.hasData
? ListView.builder(
itemBuilder: (context, index) => ListTile(
title: Text(
(snapshot.data[index] as Suggestion).description!),
onTap: () {
close(context, snapshot.data![index] as Suggestion?);
},
),
itemCount: snapshot.data!.length,
)
: const SizedBox());
}
}
