フック (useParams) の問題

 <div className="App-container_map">
          {selectedProduct ? (
            <Routes>
              {/* Define the routes for each category */}
              <Route 
                path="/raw_material" <------
                element={<RawMaterial onReset={handleResetProduct} />} 
              />
              <Route 
                path="/consumibles" <------
                element={<Consumibles onReset={handleResetProduct} />} 
              />
              {/* Add more routes for other categories as needed */}
            </Routes>
          ) : (
            <div>
              <Link to={'/Inventory'}>
                <button>Inventory</button>
              </Link>
              <Link to="/">
                <button>Some Other Subject</button>
              </Link>
            </div>
          )}
        </div>

const RawMaterial = ({ onReset }) => {
  const { category, id } = useParams()
  const [ productDetails, setProductDetails ] = useState(null);
  const [error, setError] = useState(null);
  const [loading, setLoading] = useState(true);

  useEffect(() => {
    const fetchDetailedItem = async () => {
      try {
        const details = await fetchSpecificDetailedItem(category, id);
        setProductDetails(details);
      } catch (error) {
        setError(error.message);
      } finally {
        setLoading(false);
      }
    };

export const fetchSpecificDetailedItem = async (category, id) => {
  if (!category || !id) {
    console.error('Error: Category or ID is not defined', { category, id });
    throw new Error('Category or ID is not defined');
  }
  try {
    const url = `${BASE_URL}/item/${category.toLowerCase()}/${id}/`;
    console.log('Requesting URL:', url);
    const response = await axios.get(url);
    return response.data;
  } catch (error) {
    console.error('Error fetching specific item details:', error);
    throw error;
  }
};