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The title is rewritten to: Uncertain if Nextjs is detecting _app.js; Error: useSession must be wrapped in a <SessionProvider />

<p>I've been following some tutorials on Nextjs, Prisma and Auth0. My problem is, after trying to create a login/logout button on the header (by adding <code>import { useSession,signIn,signOut } from "next-auth/react" </code> to <code> header.js</code> file), the following error occurs in next.js<code>Error: [next-auth]: \`useSession\` must be wrapped in \<SessionProvider /></code> . I tried creating the <code>_app.js</code> file in the root folder, then at <code>/pages/_app.js</code> and finally at <code>/app/_app Created at .js</code>. None of these work. </p> <p>This is the content of my<code>_app.js file: </code></p> <pre class="brush:php;toolbar:false;">import { SessionProvider } from "next-auth/react" export default function App({ Component, pageProps: { session, ...pageProps }, }) { return ( <SessionProvider session={session}> <Component {...pageProps} /> </SessionProvider> ) }</pre> <p>How do I make sure Next is detecting and using it? I think the file is being ignored to some extent. </p> <p>I tried changing the location of the <code>_app.js</code> file from the root folder of the project to <code>/pages/_app.js</code> and finally to <code> ;app/_app.js</code> . I also tried deleting the <code>.next</code> folder and re-running the server but it didn't work. </p> <p><strong>Update 1: </strong> Next.js version I'm using: v13.4.4</p> <p><strong>Update 2: </strong> I've added the <code>console.log()</code> function to the <code>_app.js</code> file and it prints to the terminal, but not on Firefox. <code>_app.js</code> Is the detection normal or is there a problem? </p> <p><strong>I (sort of) fixed it! Check my answer below. But it doesn't work when deployed to Vercel. </strong></p>
P粉771233336P粉771233336383 days ago559

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  • P粉966979765

    P粉9669797652023-09-04 23:19:18

    I think I've solved this problem, I decided to forget about _app.js and put everything in my custom layout.js file. I still need to test if the user will stay logged in since header.js is outside of layout.js.

    How I solved it: I added 

    'use client'
import { SessionProvider } from "next-auth/react";

    Go to layout.js (the file that comes with Next.js by default) and pass the session in the parameter of the function being "exported" (the default function RootLayout is exported). Then I wrapped all return() parameters with .

    This is part of the code:

    export default function RootLayout({ children, session }) {
  return (
    <html lang="en">
      <SessionProvider session={session}>
        <body>{children}</body>
      </SessionProvider>
    </html>
  )
}

    IMPORTANT PART: If you use the 'use client' option, Next will not allow you to export metadata, so you need to remove < code>export const metadata from your code = {....

    UPDATE: For some reason it doesn't work on Vercel (even though it runs locally). I'll try to fix it and update my answer. TL;DR: This solution works locally but does not work when deployed to Vercel.

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