[ci] yarn format
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FredKSchott
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@ -12,20 +12,23 @@ Astro Collections help you break up a larger set of data into multiple pages. Ex
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**When to use Collections: When you need to reuse a single template to generate multiple pages from a larger dataset.** If you just want to generate a single page (ex: a long list of every post on your site) then you can just fetch that data on a normal Astro page without using the Collection API.
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## Collections API
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To create a new Astro Collection, you must do three things:
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1. Create a new file in the `src/pages` directory that starts with the `$` symbol. This is required to enable the Collections API.
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- Example: `src/pages/$posts.astro` -> `/posts/1`, `/posts/2`, etc.
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- Example: `src/pages/$tags.astro` -> `/tags/:tag` (or `/tags/:tag/1`)
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2. Define and export the `collection` prop: `collection.data` is how you'll access the data for every page in the collection. Astro populates this prop for you automatically. It MUST be named `collection` and it must be exported.
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- Example: `export let collection;`
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3. Define and export `createCollection` function: this tells Astro how to load and structure your collection data. Check out the examples below for documentation on how it should be implemented. It MUST be named `createCollection` and it must be exported.
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- Example: `export async function createCollection() { /* ... */ }`
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- API Reference: [createCollection][collection-api]
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- Example: `src/pages/$posts.astro` -> `/posts/1`, `/posts/2`, etc.
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- Example: `src/pages/$tags.astro` -> `/tags/:tag` (or `/tags/:tag/1`)
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2. Define and export the `collection` prop: `collection.data` is how you'll access the data for every page in the collection. Astro populates this prop for you automatically. It MUST be named `collection` and it must be exported.
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- Example: `export let collection;`
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3. Define and export `createCollection` function: this tells Astro how to load and structure your collection data. Check out the examples below for documentation on how it should be implemented. It MUST be named `createCollection` and it must be exported.
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- Example: `export async function createCollection() { /* ... */ }`
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- API Reference: [createCollection][collection-api]
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## Example: Simple Pagination
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@ -43,13 +46,13 @@ export async function createCollection() {
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// its fine to just return the full set of posts for the collection data.
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async data() { return allPosts; },
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// number of posts loaded per page (default: 25)
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pageSize: 10,
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pageSize: 10,
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};
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}
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---
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<html lang="en">
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<head>
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<title>Pagination Example: Page Number {collection.page.current}</title>
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<title>Pagination Example: Page Number {collection.page.current}</title>
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</head>
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<body>
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{collection.data.map((post) => (
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@ -65,8 +68,8 @@ export async function createCollection() {
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```jsx
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---
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// In addition to `collection.data` usage illustrated above, the `collection`
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// prop also provides some important metadata for you to use, like: `collection.page`,
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// In addition to `collection.data` usage illustrated above, the `collection`
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// prop also provides some important metadata for you to use, like: `collection.page`,
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// `collection.url`, `collection.start`, `collection.end`, and `collection.total`.
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// In this example, we'll use these values to do pagination in the template.
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export let collection: any;
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@ -74,7 +77,7 @@ export async function createCollection() { /* See Previous Example */ }
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---
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<html lang="en">
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<head>
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<title>Pagination Example: Page Number {collection.page.current}</title>
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<title>Pagination Example: Page Number {collection.page.current}</title>
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<link rel="canonical" href={collection.url.current} />
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<link rel="prev" href={collection.url.prev} />
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<link rel="next" href={collection.url.next} />
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@ -106,9 +109,9 @@ export async function createCollection() { /* See Previous Example */ }
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// Define the `collection` prop.
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export let collection: any;
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// Define a `createCollection` function.
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// Define a `createCollection` function.
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// In this example, we'll customize the URLs that we generate to
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// create a new page to group every pokemon by first letter of their name.
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// create a new page to group every pokemon by first letter of their name.
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export async function createCollection() {
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const allPokemonResponse = await fetch(`https://pokeapi.co/api/v2/pokemon?limit=150`);
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const allPokemonResult = await allPokemonResponse.json();
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@ -125,8 +128,8 @@ export async function createCollection() {
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// It should always match the file location (ex: `src/pages/$pokemon.astro`).
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permalink: ({ params }) => `/pokemon/${params.letter}`,
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// `data` is now responsible for return the data for each page.
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// Luckily we had already loaded all of the data at the top of the function,
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// so we just filter the data here to group pages by first letter.
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// Luckily we had already loaded all of the data at the top of the function,
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// so we just filter the data here to group pages by first letter.
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// If you needed to fetch more data for each page, you can do that here as well.
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async data({ params }) {
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return allPokemon.filter((pokemon) => pokemon.name[0] === params.letter);
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@ -134,7 +137,7 @@ export async function createCollection() {
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// Finally, `pageSize` and `pagination` is still on by default. Because
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// we don't want to paginate the already-grouped pages a second time, we'll
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// disable pagination.
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pageSize: Infinity,
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pageSize: Infinity,
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};
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}
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---
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@ -154,7 +157,7 @@ export async function createCollection() {
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// Define the `collection` prop.
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export let collection: any;
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// Define a `createCollection` function.
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// Define a `createCollection` function.
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// In this example, we'll create a new page for every single pokemon.
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export async function createCollection() {
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const allPokemonResponse = await fetch(`https://pokeapi.co/api/v2/pokemon?limit=150`);
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@ -169,15 +172,15 @@ export async function createCollection() {
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// `permalink` defines the final URL for each route object defined in `routes`.
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permalink: ({ params }) => `/pokemon/${params.name}`,
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// `data` is now responsible for return the data for each page.
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// Luckily we had already loaded all of the data at the top of the function,
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// so we just filter the data here to group pages by first letter.
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// Luckily we had already loaded all of the data at the top of the function,
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// so we just filter the data here to group pages by first letter.
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// If you needed to fetch more data for each page, you can do that here as well.
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async data({ params }) {
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return allPokemon[params.index];
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},
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// Note: The default pageSize is fine because technically only one data object
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// Note: The default pageSize is fine because technically only one data object
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// is ever returned per route. We set it to Infinity in this example for completeness.
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pageSize: Infinity,
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pageSize: Infinity,
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};
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}
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---
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