Axios 및 React-TanStack-Query를 사용하여 Next.js에서 데이터를 가져오는 완전한 가이드

<code class="language-javascript">// /components/providers/QueryProvider.jsx
"use client"
import { QueryClient, QueryClientProvider } from "@tanstack/react-query";

const queryClient = new QueryClient();

export default function QueryProvider({ children }) {
  return (
    <QueryClientProvider client={queryClient}>
      {children}
    </QueryClientProvider>
  );
}</code>

<code class="language-javascript">// /layout.jsx
import localFont from "next/font/local";
import "./globals.css";
import QueryProvider from "../components/providers/QueryProvider";

const geistSans = localFont({
    src: "./fonts/GeistVF.woff",
    variable: "--font-geist-sans",
    weight: "100 900",
});
const geistMono = localFont({
    src: "./fonts/GeistMonoVF.woff",
    variable: "--font-geist-mono",
    weight: "100 900",
});

export const metadata = {
    title: "Tanstack Query with axios",
    description: "Generated by create next app",
};


export default function RootLayout({ children }) {
    return (
        <QueryProvider>{children}</QueryProvider>
    );
}</code>

<code class="language-javascript">import { useEffect, useState } from "react";

export default function Movies() {
  const [movies, setMovies] = useState([]);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState(null);

  useEffect(() => {
    fetch("https://api.example.com/movies")
      .then(res => res.json())
      .then(data => {
        setMovies(data);
        setLoading(false);
      })
      .catch(err => {
        setError(err);
        setLoading(false);
      });
  }, []);

  if (loading) return <p>Loading movies...</p>;
  if (error) return <p>Error loading movies: {error.message}</p>;

  return (
    <ul>
      {movies.map(movie => (
        <li key={movie.id}>{movie.title}</li>
      ))}
    </ul>
  );
}</code>

<code class="language-javascript">import { useQuery } from "@tanstack/react-query";
import axios from "axios";

const fetchMovies = async () => {
  const response = await axios.get("https://api.example.com/movies");
  return response.data;
};

export default function Movies() {
  const { data: movies, error, isLoading } = useQuery(["movies"], fetchMovies);

  if (isLoading) return <p>Loading movies...</p>;
  if (error) return <p>Error loading movies: {error.message}</p>;

  return (
    <ul>
      {movies.map(movie => (
        <li key={movie.id}>{movie.title}</li>
      ))}
    </ul>
  );
}</code>

<code class="language-javascript">// utils/axios.js
import axios from "axios";

const axiosInstance = axios.create({
  baseURL: "https://api.example.com",
  headers: {
    Authorization: `Bearer ${process.env.API_TOKEN}`,
  },
});

export default axiosInstance;</code>

<code class="language-javascript">import { useQuery } from "@tanstack/react-query";
import axiosInstance from "../utils/axios";

const fetchMovies = async () => {
  const response = await axiosInstance.get("/movies");
  return response.data;
};

// ... rest of the Movies component remains the same</code>