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我正在尝试将 graphql_flutter 用于我的颤振应用程序，但无法建立连接，并且出现以下错误：

I/flutter ( 6283): OperationException(linkException: ServerException(originalException: SocketException: OS Error: Connection refused, errno = 111, address = localhost, port = 36582, parsedResponse: null), graphqlErrors: [])

我的猜测是错误说端口是 36582，但我的服务器在 localhost 的端口 4000 上。

这是主应用程序的代码

void main() async {
  await initHiveForFlutter();

  final HttpLink httpLink = HttpLink('http://localhost:4000/');

  final AuthLink authLink = AuthLink(
    getToken: () async => 'Bearer <YOUR_PERSONAL_ACCESS_TOKEN>',
    // OR
    // getToken: () => 'Bearer <YOUR_PERSONAL_ACCESS_TOKEN>',
  );

  final Link link = authLink.concat(httpLink);

  ValueNotifier<GraphQLClient> client = ValueNotifier(
    GraphQLClient(
      link: link,
      cache: GraphQLCache(
        store: HiveStore(),
      ),
    ),
  );
  runApp(MyApp(client));
}

class MyApp extends StatelessWidget {
  final ValueNotifier<GraphQLClient> client;

  MyApp(this.client);

  @override
  Widget build(BuildContext context) {
    return GraphQLProvider(
      client: client,
      child: MaterialApp(
        title: 'Flutter Demo',
        theme: ThemeData(
          primarySwatch: Colors.blue,
          visualDensity: VisualDensity.adaptivePlatformDensity,
        ),
        home: MyHomePage(title: 'Flutter Demo Home Page'),
      ),
    );
  }
}

地址也是正确的，最后不包括“/graphql”。这些查询在邮递员和我的 Angular 应用程序的 apollo-client 中都可以正常工作。任何建议，将不胜感激。

这是给出错误的查询小部件

Query(
              options: QueryOptions(
                  document: gql(ActionData.fetchCalendarActions),
                  variables: {
                    'userId': "60157b3dd6882132841d9a25",
                    'currentList': 'calendar'
                  }),
              builder: (QueryResult result,
                  {VoidCallback refetch, FetchMore fetchMore}) {
                if (result.hasException) {
                  print(result.exception.toString());
                  return Text(result.exception.toString());
                }

                if (result.isLoading) {
                  return Text('Loading');
                }

                print(result);
                return Text('result');
              },
            ),

这是查询：

class ActionData {
  static String fetchCalendarActions =
      """query getCalendarActions(\$userId: ID!, \$currentList: String!) {
  getActionForList(userId: \$userId, currentList: \$currentList ) {
    _id
    title
    tags
  }
}""";
}
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