what's the best way to cache and revalidate data that im getting from my db within an async server component. im hesitant to use route handlers since I believe directly making these requests is ideal in server components
#caching in async components
dire nest
balmy mangoBOT
Hi @dire nest. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:
Next.js extends the native fetch Web API to allow you to configure the caching and revalidating behavior for each fetch request on the server. You can use fetch with async/await in Server Components.
Here's an example of how you can use fetch to cache and revalidate data in an async server component:
export default async function Page() {
// This request should be cached until manually invalidated.
// Similar to `getStaticProps`.
// `force-cache` is the default and can be omitted.
const staticData = await fetch(`<https://...`,> { cache: 'force-cache' })
// This request should be refetched on every request.
// Similar to `getServerSideProps`.
const dynamicData = await fetch(`<https://...`,> { cache: 'no-store' })
// This request should be cached with a lifetime of 10 seconds.
// Similar to `getStaticProps` with the `revalidate` option.
const revalidatedData = await fetch(`<https://...`,> {
next: { revalidate: 10 },
})
return <div>...</div>
}
In this example, fetch is used with different cache options to control how the data is cached and revalidated. The force-cache option indicates that the request should be cached until manually invalidated. The no-store option indicates that the request should be refetched on every request. The revalidate option indicates that the request should be cached with a lifetime of 10 seconds[^1^].
You can also revalidate the Next.js Cache inside your Server Actions with the revalidatePath or revalidateTag APIs[^9^].
[^1^]: (source: https://nextjs.org/docs/app/api-reference/functions/fetch)
[^9^]: (source: https://nextjs.org/docs/app/building-your-application/data-fetching/server-actions-and-mutations#revalidating-data)
Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:
dire nest
@balmy mango im directly making calls to my database through db.find, not through fetch requests. how do i cache these results without the use of fetch requests?
balmy mangoBOT
Let me check the knowledge base for you. One moment! :books:
In cases where you're using a third-party library that doesn't support or expose fetch (for example, a database, CMS, or ORM client), you can still configure the caching and revalidating behavior of those requests using the Route Segment Config Option and React's cache function[^5^].
Here's an example of how you can use the cache function to memoize data requests:
import { cache } from 'react'
export const getItem = cache(async (id: string) => {
const item = await db.item.findUnique({ id })
return item
})
In this example, the getItem function is called twice, but only one query will be made to the database[^2^].
You can also use the revalidate option in the Layout and Page segments to set the cache lifetime of a resource (in seconds):
import { getItem } from '@/utils/get-item'
export const revalidate = 3600 // revalidate the data at most every hour
export default async function Layout({
params: { id },
}: {
params: { id: string }
}) {
const item = await getItem(id)
// ...
}
In this example, the revalidate option is set to 3600, meaning the data will be cached and revalidated at most every hour[^2^].
[^2^]: (source: https://nextjs.org/docs/app/building-your-application/data-fetching/fetching-caching-and-revalidating#example)
[^5^]: (source: https://nextjs.org/docs/app/building-your-application/data-fetching/fetching-caching-and-revalidating#fetching-data-on-the-server-with-third-party-libraries)
Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:
dire nest
@balmy mango can these functions be associated with tags so that i can conditionally revalidate any function that uses these tags?
balmy mangoBOT
Let me check the knowledge base for you. One moment! :books:
In Next.js, the revalidateTag function is used to invalidate the cache for a specific tag[^4^]. However, this function is typically used in conjunction with fetch requests, where you can associate cache entries with one or more tags[^2^].
As of now, there's no direct way to associate tags with database queries or other non-fetch operations. The cache tagging system in Next.js is designed to work with fetch requests and the built-in caching mechanism[^2^].
If you want to conditionally revalidate data based on certain conditions, you might need to implement your own caching layer or use a third-party caching library that supports tagging.