在 Apollo Client 中，当进行分页操作时，经常会使用到 refetch 方法来重新拉取数据。但是，在进行了某些 mutation 操作后，需要在 refetch 时包含上一次的变化。这时，可以使用 update 方法来手动更新 Apollo cache，然后再触发 refetch。

示例代码：

import { useMutation } from '@apollo/client';
import { gql } from 'apollo-boost';

const MUTATION_CREATE_ITEM = gql`
  mutation CreateItem($name: String!, $priority: Int!) {
    createItem(input: { name: $name, priority: $priority }) {
      item {
        id
        name
        priority
      }
    }
  }
`;

const QUERY_GET_ITEMS = gql`
  query GetItems($cursor: ID) {
    items(first: 10, after: $cursor) {
      edges {
        node {
          id
          name
          priority
        }
      }
      pageInfo {
        hasNextPage
        endCursor
      }
    }
  }
`;

const ItemList = () => {
  const [createItem] = useMutation(MUTATION_CREATE_ITEM);
  const { data, loading, fetchMore, refetch } = useQuery(QUERY_GET_ITEMS);

  const handleSubmit = async (e) => {
    e.preventDefault();
    await createItem({
      variables: {
        name: e.target.elements.name.value,
        priority: parseInt(e.target.elements.priority.value, 10),
      },
      update: (cache, { data: { createItem } }) => {
        const { item } = createItem;
        const queryResult = cache.readQuery({
          query: QUERY_GET_ITEMS,
        });
        const { edges } = queryResult.items;
        const firstEdge = edges[0];

        // Add the new item to the Apollo cache
        cache.writeQuery({
          query: QUERY_GET_ITEMS,
          data: {
            items: {
              edges: [
                {
                  node: {
                    id: item.id,
                    name: item.name,
                    priority: item.priority,
                    __typename: 'ItemNode',
                  },
                  cursor: firstEdge.cursor - 1,
                  __typename: 'ItemNodeEdge',