React Query?? ??????? ?? ?? ??? ??? ??????

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React Query? ??? ???? ???? ???? ?? ??????, ??? ??, ?? ? ???? ???? ???? ??? ??? ?????. ?? ??? ?????? ??? ???? ?? ??? ?? ???, ??? ??? ??? ?? ??? ?? ?? ????. ??? ?? ??? ????? ?? ??? ?? ??? ???? ??? ?? ??? ?? ? ????.

?? ?? ??? ??? ??? ?? ??? ?? ?? ???? ??? ??? ?? ??? ??? ???? ????. ? ?? ??? ????? ??? ??? ???? ??? ?????. ????? ??? ??? ???? ????? ?????.

?? ?? ?:
??? React Query? ???? ?????? ?? ?? ??? ???? ????.

import { useQuery } from 'react-query';

// 定義一個(gè)分區(qū)函數(shù)，用于將任務(wù)分成多個(gè)子任務(wù)
function partitionArray(array, partitionSize) {
   const partitions = [];
   for (let i = 0; i < array.length; i += partitionSize) {
      partitions.push(array.slice(i, i + partitionSize));
   }
   return partitions;
}

// 定義一個(gè)獲取用戶信息的查詢函數(shù)
async function fetchUserInfo(userId) {
   const response = await fetch(`api/users/${userId}`);
   const data = await response.json();
   return data;
}

// 定義一個(gè)并行查詢的函數(shù)
async function parallelQuery(userIds) {
   // 將待查詢的用戶 ID 分成多個(gè)分區(qū)
   const partitions = partitionArray(userIds, 5);
   const promises = partitions.map(partition => {
      // 對每個(gè)分區(qū)創(chuàng)建一個(gè)異步任務(wù)，使用 useQuery 進(jìn)行數(shù)據(jù)查詢
      return useQuery(['userInfo', partition], () => {
         return Promise.all(partition.map(fetchUserInfo));
      });
   });
   // 等待所有異步任務(wù)完成，并合并結(jié)果
   const results = await Promise.all(promises);
   const mergedResult = results.reduce((acc, result) => {
      return [...acc, ...result];
   }, []);
   return mergedResult;
}

// 在組件中使用并行查詢
function UserList() {
   const userIds = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
   const { data, isLoading, isError } = parallelQuery(userIds);

   if (isLoading) {
      return <div>Loading...</div>;
   }

   if (isError) {
      return <div>Error occurred while fetching user information.</div>;
   }

   return (
      <div>
         {data.map(user => (
            <div key={user.id}>
               <h2>{user.name}</h2>
               <p>{user.email}</p>
            </div>
         ))}
      </div>
   );
}

? ????? ?? ??? ???? ?? partitionArray ??? ?????. ?? ??? ??? ??? ??? ????. ???? ??? ??? ?? ????? ????. ???? ??? ??? ?? ?? ?? ?? fetchUserInfo? ?????. ? ??? ??? ID? ?? ??? ?? ??????? ???? ??? ??? ?????.

?? ?? ??? ID ??? ???? ????? ??? ID? ?? ?? ?? ????? ??? ??? ??? ?? React Query? useQuery? ???? ? ???? ?? ??? ??? ???? ?? ?? ?? parallelQuery? ??????. ??. ????? ?? ??? ??? ???? ??? ??? ??? ?????.

UserList ?? ????? ParallelQuery ??? ???? ???? ???? ??? ?? ??? ?? ??? UI? ??????. ???? ?? ??? "?? ?..."? ????, ??? ???? ?? ???? ????, ??? ??? ?? ??? ?? ??? ??? ??????.

?? ?? ??? ?? React Query?? ??????? ?? ?? ??? ???? ??? ??? ??? ?? ??? ???? ? ????.

? ??? React Query?? ??????? ?? ?? ??? ???? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!