[wp-trac] [WordPress Trac] #45423: Use custom capabilities for the block editor's reusable blocks.

[WordPress Trac]

#45423: Use custom capabilities for the block editor's reusable blocks.
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 Reporter:  peterwilsoncc             |       Owner:  pento
     Type:  defect (bug)              |      Status:  assigned
 Priority:  normal                    |   Milestone:  5.1
Component:  Role/Capability           |     Version:  5.0
 Severity:  normal                    |  Resolution:
 Keywords:  has-patch has-unit-tests  |     Focuses:
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Changes (by peterwilsoncc):

 * keywords:  has-patch => has-patch has-unit-tests
 * owner:  (none) => pento
 * status:  new => assigned
 * milestone:  Future Release => 5.1


Comment:

 In [attachment:"45423.2.diff"]

 * replaces the primitive caps used by blocks with `*_blocks`
 * The `read` and `create_posts` post type caps use an atypical mapping,
 the caps are not needed for the roles
 * updates the block permissions tests to use `edit_post`, `create_post`
 and `delete_post` meta caps
 * adds the new caps to roles in an update routine
 * adds the new caps to the existing unit tests
 * the UI for authors and contributors remains visible on the add page/post
 screens, however this isn't a regression.

 This fixes the white screen issues identified in #45373.

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Ticket URL: <https://core.trac.wordpress.org/ticket/45423#comment:8>
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