Backport: Add excerpt support to the wp_block post type

[poena]

This trac ticket is for adding a PHP backport of ​https://github.com/WordPress/gutenberg/pull/60549,
which adds support for excerpts to the wp_block post type.

The purpose is to enable using the excerpt as a description for patterns:
​https://github.com/WordPress/gutenberg/issues/55244

Trac ticket: https://core.trac.wordpress.org/ticket/61250

Add excerpt to the list of supports when registering the wp_block post type.

Thanks @carolinan! It seems the failures are valid since the excerpt is returned in the API response.

Thanks @carolinan! It seems the failures are valid since the excerpt is returned in the API response.

I don't know what that means, who can help fix it?

I don't know what that means, who can help fix it?

I'm not excerpt here, but I tried this:

1. In your branch start the dev environment npm run env:start
2. Run the php tests npm run test:php
3. Just by running the tests, my tests/qunit/fixtures/wp-api-generated.js file got updated with the excerpt info in wp/v2/blocks endpoint.

Can you try the above and then push the changes from the generated file? I believe this should be enough, but if this doesn't work, let's ping some more folks 😄

[SergeyBiryukov]

In 58184:

Editor: Add excerpt support to the wp_block post type.

The purpose is to enable using the excerpt as a description for user-created patterns on the Site Editor Pattern screens.

This commit backports the original PR from Gutenberg repository:

• ​#60549: [Data Views] User patterns: Use excerpt as description

Reference: ​#55244: Patterns: Add descriptions to user-created patterns.

Follow-up to [44146], [44150], [50835], [56030].

Props poena, ntsekouras, krupalpanchal.
Fixes #61250.

Thanks for the PR! Merged in r58184.