#it is possible to call server api once and share data into Metadata & Component?

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wise zephyrBOT
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Hi @mortal dagger. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:

#

Based on the provided extracts, there isn't a direct way to share data fetched in the generateMetadata function with the page component. The generateMetadata function is used to generate dynamic metadata based on dynamic information such as route parameters or external data. This function should return a Metadata object containing one or more metadata fields.

The data fetched in generateMetadata is used to populate metadata fields and is not directly passed to the page component. The page component would need to fetch its own data, potentially resulting in duplicate API calls if it needs the same data as generateMetadata.

Here's the example code you provided:

import { Metadata, ResolvingMetadata } from 'next'
 
type Props = {
  params: { id: string }
  searchParams: { [key: string]: string | string[] | undefined }
}
 
export async function generateMetadata(
  { params, searchParams }: Props,
  parent: ResolvingMetadata
): Promise<Metadata> {
  // read route params
  const id = params.id
 
  // fetch data
  const product = await fetch(`<https://.../${id}`>).then((res) => res.json())
 
  // optionally access and extend (rather than replace) parent metadata
  const previousImages = (await parent).openGraph?.images || []
 
  return {
    title: product.title,
    openGraph: {
      images: ['/some-specific-page-image.jpg', ...previousImages],
    },
  }
}
 
export default function Page({ params, searchParams }: Props) {}

In this code, the generateMetadata function fetches data based on the id route parameter and uses this data to generate metadata. The Page component, however, does not receive this fetched data as props.

#

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mortal dagger
#

@wise zephyr
so you mean we need to call api to get data in both
generateMetadata as well as in page component ?

wise zephyrBOT
#

Let me check the knowledge base for you. One moment! :books:

#

Yes, based on the provided extracts, if you need to use the same data in both the generateMetadata function and the page component, you would need to fetch the data separately in both places.

The generateMetadata function is used to generate dynamic metadata and does not pass its fetched data to the page component. Therefore, if the page component also needs this data, it would need to fetch it separately.

Here's the example from the extracts:

import { Metadata, ResolvingMetadata } from 'next'
 
type Props = {
 params: { id: string }
 searchParams: { [key: string]: string | string[] | undefined }
}
 
export async function generateMetadata(
 { params, searchParams }: Props,
 parent: ResolvingMetadata
): Promise<Metadata> {
 // read route params
 const id = params.id
 
 // fetch data
 const product = await fetch(`<https://.../${id}`>).then((res) => res.json())
 
 // optionally access and extend (rather than replace) parent metadata
 const previousImages = (await parent).openGraph?.images || []
 
 return {
 title: product.title,
 openGraph: {
 images: ['/some-specific-page-image.jpg', ...previousImages],
 },
 }
}
 
export default function Page({ params, searchParams }: Props) {}

In this code, both the generateMetadata function and the Page component would need to fetch their own data.

For more information, you can refer to the Next.js documentation on generateMetadata (https://nextjs.org/docs/app/api-reference/functions/generate-metadata) and Metadata Object and generateMetadata Options (https://nextjs.org/docs/app/api-reference/functions/generate-metadata#metadata-fields).

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