如何在 React 中的排序方法上觸發渲染（帶有過濾器和分頁）？

Question

這是我的 Sort.js 樣式元件：

<SortWrapper>
    <SortText>Sort By</SortText>
    <SortSelect onChange={onSelectChange}>
      <SortOption value="vehicleMake">Vehicle make</SortOption>
      <SortOption value="vehicleModel">Vehicle model</SortOption>
    </SortSelect>
  </SortWrapper>

這是 App.js 中的函數，其中渲染排序元件

<Sort onSelectChange={onSelectChange} />

這是一個函數：

const onSelectChange = (e) => {
const value = e.target.value;

if (value === "VehicleMake")
  vehicles.sort((a, b) => a.vehicleMake.localeCompare(b.vehicleMake));
else if (value === "VehicleModel") {
  vehicles.sort((a, b) => a.vehicleModel.localeCompare(b.vehicleModel));
} else {
  vehicles.sort((a, b) => a.id - b.id);
}

「車輛」是我從 Firestore 資料庫取得的物件陣列。

每當我更改 SortOption 的值時，它不會自動對物件數組進行排序，但當我單擊分頁中的第 2 頁，然後單擊第 1 頁時，它會對其進行排序。

這是我的網格元件：

<Grid>
      {vehiclesData.map((vehicle) => (
        <VehicleCard
          id={vehicle.id}
          key={vehicle.id}
          ImageURL={vehicle.ImageURL}
          vehicleMake={vehicle.vehicleMake}
          vehicleModel={vehicle.vehicleModel}
          selectVehicle={() => setSelectedVehicle(vehicle)}
          deleteHandler={() => deleteHandler(vehicle.id)}
        />
      ))}
    </Grid>

這是我的篩選功能：

const vehiclesData = useMemo(() => {
let computedVehicles = vehicles;

if (searchVehicle) {
  computedVehicles = computedVehicles.filter((vehicle) =>
    vehicle.vehicleMake.toLowerCase().includes(searchVehicle.toLowerCase())
  );
}

setTotalVehicles(computedVehicles.length);

return computedVehicles.slice(
  (currentPage - 1) * vehiclesPerPage,
  (currentPage - 1) * vehiclesPerPage + vehiclesPerPage
);

正如我之前所寫，我希望我的車輛按品牌或型號自動渲染，而不是在我單擊分頁中的頁碼時渲染。

Answer 1

你的排序方法應該是這樣的

const onSelectChange = (e) => {
let temVehicles = [...vehicles]
const value = e.target.value;

if (value === "VehicleMake")
  temVehicles .sort((a, b) => a.vehicleMake.localeCompare(b.vehicleMake));
else if (value === "VehicleModel") {
  temVehicles .sort((a, b) => a.vehicleModel.localeCompare(b.vehicleModel));
} else {
  temVehicles .sort((a, b) => a.id - b.id);
}
setVehicles(temVehicles )}

你的濾波函數應該是這樣的

const vehiclesData = useMemo(() => {
let computedVehicles = vehicles;

if (searchVehicle) {
  computedVehicles = computedVehicles.filter((vehicle) =>
    vehicle.vehicleMake.toLowerCase().includes(searchVehicle.toLowerCase())
  );
}

setTotalVehicles(computedVehicles.length);

return computedVehicles.slice(
  (currentPage - 1) * vehiclesPerPage,
  (currentPage - 1) * vehiclesPerPage + vehiclesPerPage
);},[vehicles])

基本上，一旦 onSelectChange 運行，您就會更新車輛狀態，然後 usememo 應該再次運行，因此我們向其中添加依賴車輛