What is the best way to transfer an imageUrl from document data to a component within Astro.js?

Currently, I am immersed in a project involving Astro.js and facing the challenge of transferring the imageUrl data from the document to a MarkdownContainer component.

The markdown template specifies the layout for Astro to utilize "../../layouts/MarkdownContainer.astro":

---
id: d39fa1e8-412a-4672-8d7e-e7bcb6b45b95
layout: ../../layouts/MarkdownContainer.astro
title: Template
description: Template
imageUrl: ../../assets/test.jpg
date: Sep 7, 2023
datetime: "2023-09-07"
category: Blog
disable: true
---
# Hello World

Note that frontmatter.imageUrl is merely a string and not a parsed object. Herein lies my main predicament. This is the specified layout:

---
import { Image } from "astro:assets";
const { frontmatter } = Astro.props;
---

<Image
  width={800}
  height={450}
  format="webp"
  src={frontmatter.imageUrl}
  alt={frontmatter.title}
  class="mt-6 aspect-[16/9] w-full rounded-2xl bg-gray-100 object-cover sm:aspect-[2/1] lg:aspect-[3/2]"
  transition:name={frontmatter.id}
/>

Moreover, here's the [slug].astro file:

---
import type { Code } from "astro:components";
import Layout from "../../layouts/Layout.astro";
import { type CollectionEntry, getCollection } from "astro:content";

export async function getStaticPaths() {
  const docs = await getCollection("documentation");
  return docs.map((doc) => ({
    params: { slug: doc.slug },
    props: doc,
  }));
}

type Props = CollectionEntry<"documentation">;

const doc = Astro.props;
const { Content } = await doc.render();
---
<Layout title={doc.data.title} description={doc.data.description}>
  <Content />
</Layout>

Within the [slug].astro file, my objective is to extract the imageUrl data from doc.data and ingrate it into the MarkdownContainer component. The imageUrl structure comprises:

imageUrl: {
  height: number;
  src: string;
  width: number;
  format: "png" | "jpeg" | "webp" | "gif";
};

Nevertheless, I find myself at a loss on how to tackle this issue. Any guidance would be greatly appreciated!

Many thanks in advance!

Answer №1

The Picture element needs the image metadata to function properly. Typically, this information is obtained during the image import process. However, when dealing with content collections, you must utilize the image helper. By using this helper, you can resolve the image import and receive the correct object for the picture.

import { defineCollection, z } from 'astro:content'

const resources = defineCollection({
  schema: ({ image }) => z.object({
    ...
    image: image(),
  }),
})

export const collections = {
  resources,
};

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