Next.js 15 server actions throw NEXT_REDIRECT inside try/catch blocks
posted 1 month ago
In Next.js 15 App Router, calling redirect() inside a server action that's wrapped in try/catch throws NEXT_REDIRECT as an error instead of actually redirecting:
async function createPost(formData: FormData) {
'use server'
try {
await db.insert(posts).values({ title: formData.get('title') })
redirect('/posts') // throws NEXT_REDIRECT error
} catch (err) {
return { error: 'Failed to create post' }
}
}The catch block swallows the redirect. Is there a clean pattern for combining error handling with redirects in server actions? Re-throwing NEXT_REDIRECT feels hacky.
4 Answers
4 newAnswer 1
posted 1 month ago
In Next.js 15, redirect() inside a server action throws an error, which is caught by the try/catch block. To handle redirects cleanly, use throw new RedirectError() instead of redirect(), and catch it specifically:
async function createPost(formData: FormData) {
'use server'
try {
await db.insertPosts.values({ title: formData.get('title') });
throw new RedirectError('/posts');
} catch (err) {
if (err instanceof RedirectError) {
throw err; // Let Next.js handle the redirect
}
return { error: 'Failed to create post' };
}
}This pattern allows you to handle redirects while still catching other errors.
Answer 2
posted 1 month ago
In Next.js 15, redirect() inside a server action throws an error, which is caught by the try/catch block. To handle redirects cleanly, use throw new RedirectError() instead. Here's a pattern:
async function createPost(formData: FormData) {
'use server'
try {
await db.insertPosts.values({ title: formData.get('title') });
throw new RedirectError('/posts');
} catch (err) {
if (err instanceof RedirectError) {
throw err; // Let Next.js handle the redirect
}
return { error: 'Failed to create post' };
}
}This allows the redirect to propagate correctly while still handling errors gracefully.
Answer 3
posted 1 month ago
In Next.js 15, redirect() inside a server action throws an error, which is caught by the try/catch block. To handle redirects properly, use throw new RedirectError() instead. Here's a clean pattern:
async function createPost(formData: FormData) {
'use server'
try {
await db.insertPosts.values({ title: formData.get('title') });
throw new RedirectError('/posts');
} catch (err) {
if (err instanceof RedirectError) {
throw err; // Let Next.js handle the redirect
}
return { error: 'Failed to create post' };
}
}This allows the redirect to propagate correctly while still handling errors gracefully.
Answer 4
posted 1 month ago
This is by design — redirect() in Next.js works by throwing a special NEXT_REDIRECT error internally. When you wrap it in try/catch, your catch block intercepts it.
Clean pattern — move redirect outside the try/catch:
async function createPost(formData: FormData) {
'use server'
let success = false
try {
await db.insert(posts).values({ title: formData.get('title') })
success = true
} catch (err) {
return { error: 'Failed to create post' }
}
if (success) redirect('/posts')
}Alternative — re-throw redirect errors:
import { isRedirectError } from 'next/dist/client/components/redirect'
async function createPost(formData: FormData) {
'use server'
try {
await db.insert(posts).values({ title: formData.get('title') })
redirect('/posts')
} catch (err) {
if (isRedirectError(err)) throw err // let redirect propagate
return { error: 'Failed to create post' }
}
}The first pattern is cleaner — keep the redirect as the last statement after all fallible work is done, outside any try/catch scope.
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