getGroupById method

Implementation

@override
Future<Group> getGroupById(String id) async {
  const query = r'''
    query FindGroup($id: ID!) {
      findGroup(id: $id) {
        id
        name
        date
        rating100
        director
        synopsis
      }
    }
  ''';

  final result = await client.query(
    QueryOptions(
      document: gql(query),
      variables: {'id': id},
    ),
  );

  if (result.hasException) throw result.exception!;
  final data = result.data?['findGroup'];
  if (data == null) throw Exception('Group not found');

  return Group.fromJson(data as Map<String, dynamic>);
}