<p>阿波罗链接错误：graphQLErrors 参数始终未定义</p>

预期结果：将graphQLError 消息记录到控制台

从失败的查询返回的错误消息似乎永远不会成为onError()因为graphQLErrors总是未定义的，但我总是得到一个 networkError。 我可以在 chrome 的网络选项卡中找到带有响应错误消息的失败请求。 我错过了什么吗？

// Log errors
const errorLink = onError(({ graphQLErrors, networkError }) => {
  if (graphQLErrors)
    graphQLErrors.map(({ message, locations, path }) =>
      console.log(
        `[GraphQL error]: Message: ${message}, Location: ${locations}, Path: ${path}`
      )
    );
  if (networkError) console.log(`[Network error]: ${networkError}`);
});

// Combine all links
const link = split(
  // split based on operation type: subscription or query/mutation
  ({ query }) => {
    const { kind, operation } = getMainDefinition(query);
    return kind === 'OperationDefinition' && operation === 'subscription';
  },

  // Subscriptions Link
  from([
    // Log Apollo operations in development
    ...(__DEV__ ? [apolloLogger] : []),

    // Handle subscriptions, log errors in dev
    ...(__DEV__ ? [errorLink.concat(subscriptionsLink)] : [subscriptionsLink]),
  ]),


  // Uploads/http Link
  from([
    // Log Apollo operations in development
    ...(__DEV__ ? [apolloLogger] : []),

    // Handle http/file uploads, log errors in dev
    ...(__DEV__ ? [errorLink.concat(uploadLink)] : [uploadLink]),
  ]),
);