[gatsby] Render just one page

[jquintozamora]

I've scenario with 5 different templates and more than 50 pages on my site.

I'd like to know if there is a cli option for gatsby which allow me to render only one given page. So If I only change the content for one page ( one url on my app ) then only that static file is generated and it doesn't update everything on my app.

Something like:
gatsby generate /mysite/mypage.html

And that specific page is updated and generated quickly, so the gatsby process does not have to process everything on my site.

Is that something I can achieve ?

Thanks!

[mquandalle]

I guess you can implement this behavior using gatsby-node.js API and a environment variable, with something like:

exports.onCreatePage = ({ page, boundActionCreators }) => {
  const { createPage, deletePage } = boundActionCreators; // renamed to `actions` in Gatsby v2
  const singlePageMode = process.env.SINGLE_PAGE !== undefined;

  if (singlePageMode && !/404/.test(page.path) && page.path !== process.env.SINGLE_PAGE) {
    deletePage(page);
  }
};

and then, when you only want to build a single page: SINGLE_PAGE="/mypage" gatsby build

[jquintozamora]

Hi @mquandalle ,
Thanks for that, but I guess with that approach we still need to generate all the project and later on remove the pages we don't need. Did I understand well?
The main reason I asked for a single page approach is to save time and being able to render a preview when I change something on my CMS.

[mquandalle]

The onCreatePage function is called at the beginning of the bundling process, when pages aren't built yet, so you'll indeed save time by using something like the above.

[gatsbot]

This issue is being closed due to inactivity. Is this a mistake? Please re-open this issue or create a new issue.

[oliviertassinari]

I have a SSR issue, I would like to debug the problem without having to rebuild the whole app between each iteration. It's frustrating.

[maxcorbeau]

Similar need here, my use case is previewing individual WordPress pages when using:
https://www.gatsbyjs.org/docs/sourcing-from-wordpress/

The content is managed in WP, the page generation in Gatsby, but would like to visualize individual WP pages as I create/update them without having to rebuild everything.

[maxcorbeau]

What about allowing to pass a series of node ids to the localhost:8000/__refresh endpoint as body or URL parameters and make those available in gatsby-node.js/createPages to decide to refresh 1 or multiple specific pages? (similar to #5496 (comment) except we replace env variables with URL parameters)

[spik3s]

What about allowing to pass a series of node ids to the localhost:8000/__refresh endpoint as body or URL parameters and make those available in gatsby-node.js/createPages to decide to refresh 1 or multiple specific pages? (similar to #5496 (comment) except we replace env variables with URL parameters)

I like that approach, it would make it easier to create hooks in CMS to automatically re-generate content on change when using 3rd party services.

[maxcorbeau]

@spik3s : Yes, keeping a REST-based approach instead of environment variables would make Gatsby a lot more interoperable. With Wordpress the integration becomes trivial:

To be placed in functions.php:

function gatsby_refresh( $post_id, $post, $update ) {
    // send $post_id to http://localhost:8000/__refresh
    return true;
}
add_action( 'save_post', 'gatsby_refresh', 10,3 );

[dandv]

Closed by the bot due to inactivity in 2018. Reopening due to activity since then, and no official solution for this very common use case.

[LekoArts]

This has been superseded by #5002 and is solved with Incremental Builds. Locally this always worked withing gatsby develop and refresh env var.

[dandv]

Thanks for pointing to #5002, @LekoArts. If I understand correctly,

• locally, re-rendering just on page withing gatsby-develop works
• in production, incremental builds are only available for Gatsby Cloud customers.

I believe @jquintozamora was asking in the OP was asking about generating just one page in production.

@LekoArts, can you please clarify how to re-render just one page in production without Gatsby Cloud?

[guifromrio]

@LekoArts, can you please clarify how to re-render just one page in production without Gatsby Cloud?

I am also interested in this 👀

Any updates?