[wp-trac] [WordPress Trac] #64133: Template activation: sync migration logic

[WordPress Trac]

#64133: Template activation: sync migration logic
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 Reporter:  ellatrix         |      Owner:  (none)
     Type:  defect (bug)     |     Status:  new
 Priority:  normal           |  Milestone:  6.9
Component:  Upgrade/Install  |    Version:  trunk
 Severity:  normal           |   Keywords:
  Focuses:                   |
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 I forgot to include migration logic in https://github.com/WordPress
 /wordpress-develop/pull/8063. Part of the reason is the I hesitated
 whether to add it as a permanent action or in `upgrade.php`, and in the
 end forgot it.

 It's not a critical issue for Beta 1 imo, but it does mean that if someone
 edited a theme template, or added a new template to the hierarchy (in the
 database) before upgrading to 6.9 Beta 1, these will not appear on the
 front-end anymore. When they upgrade again to Beta 2 with the fix, they'll
 start appearing again. Alternatively testers could manually activate their
 edited template to make it appear correctly on the front-end again.

 The fix is to add the migration logic we have in Gutenberg, which queries
 existing templates in the database and adds them to the `active_templates`
 setting.

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Ticket URL: <https://core.trac.wordpress.org/ticket/64133>
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