[wp-trac] [WordPress Trac] #44112: WP is changing page URL to avoid duplicate URL for non needed case

[WordPress Trac]

#44112: WP is changing page URL to avoid duplicate URL for non needed case
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 Reporter:  tubys               |      Owner:  (none)
     Type:  defect (bug)        |     Status:  new
 Priority:  normal              |  Milestone:  Awaiting Review
Component:  Networks and Sites  |    Version:  4.9.5
 Severity:  normal              |   Keywords:
  Focuses:  multisite           |
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 WP has URL slug validator after page/post saved, when WP recognize
 potential of duplicate URL slug between the main site pages and each of
 existing multisites URL, WP will update the post_name (page slug URL) and
 adding suffix number to the page URL.

 In the following scenario this validation should not be made:
 * Create New WP multi-site instance (sub-directory).
 * Create new site called ‘blog’ and publish it.
 * Move to root site.
 * Create new page without parent page with name ‘blog’ and publish it.
  * WP will change the page slug to ‘blog3’ (with number suffix) to avoid
 duplicate URL [OK]
 * Create new page with parent page ‘simple-page’ called ‘blog’ and publish
 it.
  * WP will change the site slug to ‘blog4’ [BUG]
 In this case WP should leave the slug as is, because the result URL will
 be “simple-page/blog” and there is no URL conflict here.

 **Possible Solution:**

 update “avoid_blog_page_permalink_collision” function [wp-
 admin/includes/ms.php:640] to do not modify the “post_name” if
 “post_parent” exists.

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Ticket URL: <https://core.trac.wordpress.org/ticket/44112>
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