Nuxt•6d ago

How to invalidate on-demand builder cache on netlify with nuxt/graphql

Hi everyone I have the following situation: I have a CMS from which I use graphql to fetch data on a page basis to display it in a nuxt3 frontend. Since netlify is now able to generate the page on the server with on-demand builders, we don't want to statically generate the site anymore. Still we would like to have an effective caching in place. So far content is not cached at all, as it might change, if I understood correctly. This results in a function invocation for every page load, which is not desirable. Instead I would like to cache all pages for a long time (or set a high TTL, as it is called for on-demand builders) and whenever an editor saves a page, I want to invalidate this pages cache/TTL, forcing a new on-demand build the next time somebody requests this page. Now I do find some resources online about caching, durable caching etc. but because nuxt/netlify is doing this under the hood (I did not have to write any functions/builders myself) I have no idea how I could a granular caching with nuxt3 and netlify. https://docs.netlify.com/configure-builds/on-demand-builders/#use-on-demand-builders Thanks a lot and have a nice day.

On-demand Builders

Use On-demand Builders to build pages for your site when users visit them for the first time, then cache the built pages at the edge for subsequent visits.

5 Replies

kapa.ai•6d ago

Hi @Jones. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- To address your question about invalidating on-demand builder cache on Netlify with Nuxt and GraphQL, I'll provide some insights based on the available information. Nuxt 3 supports hybrid rendering, which allows you to define different caching rules per route using Route Rules. This feature can be leveraged to implement the caching strategy you're looking for. Here's how you can approach this: 1. Set up route rules for caching: You can define route rules in your nuxt.config.ts file to specify caching behavior for your pages. For example:

   export default defineNuxtConfig({
     routeRules: {
       '/': { isr: true },
       '/products/**': { isr: 3600 },
     }
   })

   export default defineNuxtConfig({
     routeRules: {
       '/': { isr: true },
       '/products/**': { isr: 3600 },
     }
   })

This configuration sets up Incremental Static Regeneration (ISR) for the homepage and product pages, with a cache duration of 1 hour for product pages Hybrid Rendering (https://nuxt.com/docs/guide/concepts/rendering#hybrid-rendering). 2. Implement on-demand revalidation: To invalidate the cache for specific pages when content changes in your CMS, you can use on-demand revalidation. This feature allows you to purge the cache for an ISR route whenever you want. Here's how to set it up: a. Create an environment variable for a revalidation secret. b. Update your Nitro configuration:

   export default defineNitroConfig({
     vercel: {
       config: {
         bypassToken: process.env.VERCEL_BYPASS_TOKEN
       }
     }
   })

   export default defineNitroConfig({
     vercel: {
       config: {
         bypassToken: process.env.VERCEL_BYPASS_TOKEN
       }
     }
   })

c. To trigger revalidation, make a GET or HEAD request to the path you want to revalidate with a header of x-prerender-revalidate: bypassToken On-Demand incremental static regeneration (ISR) (https://nitro.unjs.io/deploy/providers/vercel#on-demand-incremental-static-regeneration-isr). 3. Integrate with your CMS: Set up a webhook in your CMS that triggers when an editor saves a page. This webhook should make a request to your Netlify site with the revalidation header for the specific page that was updated. 4. Fine-grained ISR config: For more granular control over caching, you can use the isr route rule with additional options:

   export default defineNitroConfig({
     routeRules: {
       "/products/**": {
         isr: {
           expiration: 3600,
           allowQuery: ["q"],
           passQuery: true,
         },
       },
     },
   });

   export default defineNitroConfig({
     routeRules: {
       "/products/**": {
         isr: {
           expiration: 3600,
           allowQuery: ["q"],
           passQuery: true,
         },
       },
     },
   });

This configuration allows you to set expiration times, handle query parameters, and group assets for revalidation Fine-grained ISR config via route rules (https://nitro.unjs.io/deploy/providers/vercel#fine-grained-isr-config-via-route-rules). 5. Netlify-specific configuration: While the documentation doesn't provide Netlify-specific instructions for on-demand revalidation with Nuxt, you can use Netlify's On-demand Builders feature. You may need to create a custom function to handle revalidation requests and trigger new builds for specific pages Netlify On-demand Builders (https://nitro.unjs.io/deploy/providers/netlify). It's important to note that the exact implementation may require some experimentation, as the integration between Nuxt 3, Netlify, and on-demand revalidation is not explicitly documented in the provided sources. You might need to combine Nuxt's ISR capabilities with Netlify's On-demand Builders to achieve the desired result. Remember to test your implementation thoroughly to ensure it behaves as expected in your specific setup. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•6d ago

<@506627355100577804> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

JonesOP•6d ago

@kapa.ai Does this also work on netlify instead of vercel?

kapa.ai•6d ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- Yes, a similar approach can work on Netlify, but there are some differences in implementation compared to Vercel. Let me explain how you can achieve this with Netlify: 1. Netlify supports On-demand Builders, which are similar to Vercel's ISR (Incremental Static Regeneration). These are serverless functions used to generate web content as needed and cache it on Netlify's Edge CDN Netlify On-demand Builders (https://nitro.unjs.io/deploy/providers/netlify). 2. To set up on-demand builders with Nuxt on Netlify, you'll need to use the netlify_builder preset in your Nitro configuration:

   export default defineNitroConfig({
     preset: 'netlify_builder'
   })

   export default defineNitroConfig({
     preset: 'netlify_builder'
   })

3. For caching and revalidation, you can still use Nuxt's route rules in your nuxt.config.ts:

   export default defineNuxtConfig({
     routeRules: {
       '/': { isr: true },
       '/products/**': { isr: 3600 },
     }
   })

   export default defineNuxtConfig({
     routeRules: {
       '/': { isr: true },
       '/products/**': { isr: 3600 },
     }
   })

This sets up ISR for your routes Hybrid Rendering (https://nuxt.com/docs/guide/concepts/rendering#hybrid-rendering). 4. For on-demand revalidation, Netlify doesn't have a built-in method like Vercel's x-prerender-revalidate header. Instead, you'll need to create a custom function to handle revalidation requests. You can do this by creating a Netlify function that triggers a new build for the specific page. 5. To invalidate the cache for a specific page, you would need to trigger a new build for that page. This can be done using Netlify's Build Hooks. You can create a build hook in your Netlify dashboard and then call it when you need to invalidate a page. 6. In your CMS, set up a webhook that calls your Netlify function or build hook when content is updated. This function should trigger a new build for the specific page that was updated. It's important to note that while this approach can work, it may not be as granular or immediate as Vercel's ISR implementation. Netlify's On-demand Builders are designed to build pages when they're first requested, rather than providing an instant cache invalidation mechanism. For the most up-to-date and Netlify-specific implementation details, I recommend checking the official Netlify documentation or reaching out to Netlify support, as the exact method might have evolved since the last update of the provided knowledge sources. Netlify Edge Functions (https://nitro.unjs.io/deploy/providers/netlify#netlify-edge-functions) could also be an alternative to consider, as they allow you to run code at the edge, closer to your users, which might provide more flexibility in handling caching and revalidation. Remember to test your implementation thoroughly in a staging environment before deploying to production, as the behavior might differ slightly from Vercel's implementation. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•6d ago

<@506627355100577804> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

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How to invalidate on-demand builder cache on netlify with nuxt/graphql