Javascript 更新响应为光标分页形状的apollo缓存

我有一个直接消息组件，如果我发送消息，我需要用发送的新消息更新缓存。显示的消息列表是基于光标的分页形状。这就是它的样子

data: {
  conversation: {
    status: 200,
    data: {
      pageInfo {
        startCursor
        endCursor
        hasNextPage
        hasPreviousPage
      }
      edges [{
        cursor: 'adsfskjaksfasd'
        node: {
          id: 'safasdks',
          content: {
            body: 'kjkajks'
          }
        }
      }]
    }
  }
}

我在发送消息时得到的响应只是一个节点

data: { sendMessage: { data: {id: 'safasdks', content: { body: 'kjkajks'}} } }

若用于显示消息列表的对话查询不是基于光标的分页形式，那个么我会这样做

const [sendMessage] = useMutation(SEND_MESSAGE, {
    optimisticResponse: true,
    update(cache, result) {
      const existingMessages: any = cache.readQuery({ query: CONVERSATION });
      const newMessages = produce(existingMessages, (draft: any) => {
        if (draft?.conversation?.data) {
          draft.conversation.data.edges = result?.data?.sendMessage?.data;
          // sendMessage return the data object which is a part of node. e.g {id: 'safasdks', content: { body: 'kjkajks'}}
        }
      });
      cache.writeQuery({
        query: CONVERSATION,
        data: newMessages,
      });
    },
  });

但是，我不知道如何更新缓存中基于光标的数据