錯誤是無法讀取未定義的屬性（讀取“toLowerCase”）

代碼不起作用，請為我更正代碼

錯誤是無法讀取未定義的屬性（讀取“toLowerCase”）

這是來自谷歌瀏覽器控制臺的錯誤訊息

我認為錯誤是我的代碼中的這一行：

const keys = ["type, name"];
const search = () => {
  return totalCar.filter((item) =>
    keys.some((key) => item[key].toLowerCase().includes(query))
  );
};

這是我的完整代碼租了一個汽車應用程式，即使在復制粘貼相同的錯誤之后，我也無法創建該應用程式

import React from "react";
import { useEffect, useState } from "react";
import { useDispatch, useSelector } from "react-redux";
import Layout from "../components/Layout";
import { getAllCars } from "../redux/actions/actions";
import axios from "axios";
import Loading from "../components/Loading";
import { Link, useNavigate } from "react-router-dom";
import { DatePicker } from "antd";
const { RangePicker } = DatePicker;

const Home = () => {
  const navigate = useNavigate();

  const { cars } = useSelector((state) => state.reducer);
  const { loading } = useSelector((state) => state.loading);
  const [totalCar, setTotalCar] = useState([]);
  const [category, setCateggory] = useState([]);
  const [query, setQuery] = useState("");

  console.log(cars);
  const dispatch = useDispatch();

  useEffect(() => {
    dispatch(getAllCars());
  }, [dispatch]);

  useEffect(() => {
    if (!localStorage.getItem("userInfo")) {
      navigate("/login");
    }

    setTotalCar(cars);
  }, [cars, navigate]);

  useEffect(() => {
    const fetchData = async () => {
      const result = await axios.get("/api/category");
      console.log(result.data);
      setCateggory(result.data);
    };
    fetchData();
  }, []);

  const setFilter = () => {
    var temp = [];

    for (var car of cars) {
      if (car.bookedTimeSlots.length === 0) {
        temp.push(car);
      }
    }

    setTotalCar(temp);
  };

  const filterResult = (catItem) => {
    const catResult = totalCar.filter((curCat) => {
      return curCat.type === catItem;
    });
    setTotalCar(catResult);
  };

  const keys = ["type, name"];
  const search = () => {
    return totalCar.filter((item) =>
      keys.some((key) => item[key].toLowerCase().includes(query))
    );
  };
  return (
    <Layout>
      <div className="slider">
        <div className="left">
          <h1 className="title"> Rent a Beautiful car</h1>
        </div>
        <div className="right">
          <img src="./images/slider/peugeot.png" alt="" />
        </div>
      </div>
      <div className="content">
        <div className="content-row">
          <h1 className="big-title">Top cars for Rent</h1>

          <div className="content-flex">
            <div className="content-row flex-1">
              <div className="div-filter">
                <h2 className="car-subtitle">****Filter by search****</h2>
                <input
                  type="text"
                  placeholder="Search..."
                  onChange={(e) => setQuery(e.target.value)}
                  className="search"
                />
                <h2 className="car-subtitle">
                  ****Filter for availability****
                </h2>
              </div>
              <RangePicker
                showTime={{ format: "HH:mm" }}
                format="YYYY-MM-DD HH:mm:ss"
                onChange={setFilter}
              />

              <div className="div-filter2">
                <h2 className="car-subtitle">****Filter By Type****</h2>
              </div>
              <div className="filter-btns">
                <button onClick={() => setTotalCar(cars)} className="btn-type">
                  All
                </button>
                {category.map((cat) => (
                  <button
                    key={cat._id}
                    onClick={() => filterResult(cat.type)}
                    className="btn-type"
                  >
                    {cat.type}
                  </button>
                ))}
              </div>
            </div>
            <div className="content-row flex-2">
              {loading ? (
                <Loading />
              ) : (
                <div className="content-groups">
                  {search(totalCar).map((car) => (
                    <div className="card" key={car._id}>
                      <div className="card-body">
                        <img
                          src={car.image}
                          className="img-cars"
                          alt={car.name}
                        />
                      </div>
                      <div className="card-footer">
                        <div className="card-footer-top">
                          <h3 className="car-title">{car.name}</h3>
                          <p className="per-day">
                            Per Day:
                            <span
                              className="bold- 
      price"
                            >
                              ${car.payPerDay.toFixed(2)}
                            </span>
                          </p>
                        </div>
                        <div className="card-footer-bottom">
                          <button className="rent-now">
                            <Link to={`/car/${car._id}`} className="rent-link">
                              Rent Now
                            </Link>
                          </button>
                        </div>
                      </div>
                    </div>
                  ))}
                </div>
              )}
            </div>
          </div>
        </div>
      </div>
    </Layout>
  );
};

export default Home;

uj5u.com熱心網友回復：

換一串

const keys = ["type, name"];

到兩個字串

const keys = ["type", "name"];

標籤：反应表示

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