I have successfully connected my custom server using Node.js and Express.js with Next.js. I'm trying to fetch a car by its id whenever I click it among other cars, so I can have that particular car only. But I keep getting an error saying params is undefined even though I get the id at the back of my link whenever I click on the single car in the browser. I've tried fetching the data using thunder client and everything works fine. I believe something is wrong with my frontend logic.
This is where I'm trying to fetch the data with the id
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script>
import Layout from "@/components/Layout";
import Image from "next/image";
import Link from "next/link";
import { useEffect, useState } from "react";
import Authorization from "@/HOC/Authorization";
import axios from "axios";
const Car = () => {
const [data, setData] = useState("");
const oneCar = async (params) => {
const { id } = params;
const res = await axios.get(`http://localhost:5000/one-car/${id}`);
setData(res.data);
if (res.status !== 200) {
console.log(res.status);
}
};
useEffect(() => {
oneCar();
}, []);
return (
<Layout>
{data && (
<div className="flex flex-col w-11/12 mx-auto mt-8 justify-center bg-blue-200 rounded-lg shadow">
<div className="flex w-full justify-center mt-6 px-4 mx-auto box-shadow-lg h-2/4 relative">
<Image
src="/assets/images/d17.jpg"
alt="shopping image"
className="mx-auto flex rounded-lg inset-0 w-full h-2/4 object-cover"
width={1000}
height={500}
/>
</div>
<form className="flex-auto p-6">
<div className="flex flex-wrap">
<h1 className="flex-auto text-xl font-semibold text-gray-800">
{data.carName}
</h1>
<div className="text-xl font-semibold text-gray-700 ">
{data.carPrice}
</div>
<div className="w-full flex-none text-sm font-medium text-gray-500 mt-2">
In stock
</div>
</div>
<div className="flex items-baseline mt-4 mb-6 text-gray-800 ">
<Link
href="#"
className="ml-auto hidden md:block text-sm text-gray-500 underline"
>
Size Guide
</Link>
</div>
<div className="flex mb-4 text-sm font-medium">
<button
type="button"
className="py-2 px-4 bg-blue-700 hover:bg-blue-800 focus:ring-indigo-500 focus:ring-offset-indigo-200 text-white w-full sm:w-1/4 transition ease-in duration-200 text-center text-base font-semibold shadow-md focus:outline-none focus:ring-2 focus:ring-offset-2 mx-auto rounded-lg "
>
Buy now
</button>
</div>
<p className="text-sm text-gray-500 text-center ">
Free shipping on all continental US orders.
</p>
</form>
</div>
)}
</Layout>
);
};
export default Authorization(Car);This is where I fetch all cars and makes the id a parameter to the link address
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script>
import Image from "next/image";
import Layout from "@/components/Layout";
import Pagination from "@/components/Pagination";
import { GiBinoculars } from "react-icons/gi";
import { useGetAllCarsQuery } from "@/store/ReduxStore/getAllCarsApi";
import Link from "next/link";
const Market = () => {
//I use RTK Query to fetch the data, and It was successfully fetched
const { data, isLoading, error } = useGetAllCarsQuery();
return (
<Layout>
<div className="2xl:container 2xl:mx-auto">
<div className=" py-3 lg:px-20 md:px-6 px-4">
<div className=" flex justify-center mt-3 items-center">
<div className=" flex space-x-3 justify-center items-center">
<span className="bg-blue-800 px-4 py-2 rounded-md text-2xl text-white">
<GiBinoculars />
</span>
<input
type="search"
className="border-b-2 w-9/12 border-gray-700 -mb-3 leading-5 text-lg p-2 focus:outline-none"
placeholder="Search for cars here..."
/>
</div>
</div>
<hr className=" w-full bg-gray-200 my-6" />
<div className=" grid lg:grid-cols-4 sm:grid-cols-2 grid-cols-1 lg:gap-y-12 lg:gap-x-8 sm:gap-y-10 sm:gap-x-6 gap-y-6 lg:mt-12 mt-10">
{data?.map((cars, i) => (
<Link
key={i}
href="/[id]"
as={`${cars._id}`}
//I insert the id here
className="relative"
passHref
>
<div>
<div className=" relative group">
<div className="caroverlay"></div>
<Image
width={600}
height={400}
className="rounded-md w-full"
src="/assets/images/d17.jpg"
alt="A girl Posing Img"
/>
<div className=" absolute bottom-0 p-8 w-full opacity-0 group-hover:opacity-100 z-20">
<button className="text-base font-bold leading-4 text-gray-600 hover:bg-gray-300 hover:text-gray-700 bg-white py-3 w-full">
Add to your garage
</button>
<button className=" bg-transparent text-base font-bold leading-4 border-2 hover:bg-gray-300 hover:text-gray-700 border-white py-3 w-full mt-2 text-white">
View Car
</button>
</div>
</div>
<p className=" text-xl leading-5 text-gray-600 md:mt-6 mt-4">
{cars.carName}
</p>
<p className=" font-semibold text-xl leading-5 text-gray-800 mt-4">
<span>$</span> {cars.carPrice}
</p>
</div>
</Link>
))}
</div>
{/* _______________________________________________________ */}
<Pagination />
{/* _______________________________________________________ */}
</div>
</div>
</Layout>
);
};
export default Market;Here is my backend logic
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script>
const router = require("express").Router();
const auth = require("../../middleware/auth");
const Car = require("../../Model/CarSchema");
router.get("/onecar/:id", auth, async (req, res) => {
try {
const car = await Car.findById(req.params.id);
res.status(200).json(car);
} catch (err) {
res.status(500).json({ msg: "Server Error" });
}
});
module.exports = router;CodePudding user response：
To access id in nextjs. I imported useRouter from next/router. Then I const router = useRouter(). Then const {id} = router.query