<CategorySelect> support post_tags and hierarchical = false taxonomy.

[torounit]

Description

<CategorySelect> support custom taxonomy with hierarchical = true now. but not working
hierarchical = false. fixed it.

How has this been tested?

Add this code. and check core/latest-posts block.

add_filter( 'register_taxonomy_args', function ( $args, $taxonomy ) {
	if ( $taxonomy === 'category' ) {
		$args['hierarchical'] = false;
	}
	return $args;
}, 10, 2 );

Types of changes

New feature (non-breaking change which adds functionality)

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.

[jorgefilipecosta]

Hi @torounit, thank you for your contribution 👍
Unfortunately, to not have cyclic dependencies the buildTermsTree logic is duplicated
https://github.com/WordPress/gutenberg/blob/feature/buildTermsTree-support-tags/packages/editor/src/utils/terms.js#L14.
Would it be possible to update the other version?

[torounit]

@jorgefilipecosta Thanks reviewing!

found in same method in packages/editor/src/utils/terms.js and updated.

[torounit]

@jorgefilipecosta need update test ?

[jorgefilipecosta]

@jorgefilipecosta need update test ?

Yes we need to update the test case on lines https://github.com/WordPress/gutenberg/blob/master/packages/editor/src/utils/test/terms.js#L7-L11

It would also be good if we could add some additional tests specific to this logic.

[jorgefilipecosta]

Would this fix also work if the parent was null instead of 0? This makes it clear that no parent exists in this case.

[torounit]

fixed to use parent: null

[torounit]

@jorgefilipecosta use null instead 0. and updated tests.

[jorgefilipecosta]

Thank you for your interactions @torounit. I think the PR is ready 👍