[wp-meta] [Making WordPress.org] #6465: Add support for `ancestor` block.json property

[Making WordPress.org]

#6465: Add support for `ancestor` block.json property
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 Reporter:  dd32              |       Owner:  tellyworth
     Type:  defect (bug)      |      Status:  accepted
 Priority:  normal            |   Milestone:
Component:  Plugin Directory  |  Resolution:
 Keywords:  needs-patch       |
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Changes (by tellyworth):

 * owner:  (none) => tellyworth
 * status:  new => accepted


Comment:

 The patch attachment:6465.diff seems to do the trick. It essentially
 treats parent and ancestor as the same. It's a bit stricter than the old
 check though, requiring that the parent/ancestor block exists within the
 same plugin. That's so that a block with a parent like `core/column` is
 correctly treated as top-level for validation purposes.

 It works ok for me at a quick test; do I have the logic right?

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Ticket URL: <https://meta.trac.wordpress.org/ticket/6465#comment:1>
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