[wp-trac] [WordPress Trac] #15459: Need Better Page Hierarchy Display Algo

[WordPress Trac]

#15459: Need Better Page Hierarchy Display Algo
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 Reporter:  truthmedia          |       Owner:
     Type:  enhancement         |      Status:  new
 Priority:  normal              |   Milestone:  Future Release
Component:  Posts, Post Types   |     Version:  3.0.1
 Severity:  normal              |  Resolution:
 Keywords:  has-patch dev-      |     Focuses:  performance, administration
  feedback                      |
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Comment (by nofearinc):

 Even when applied properly (small fixes), there are some records that are
 missing. For example:

 Items number 4, 5, 6 are children of item 3 (imagine 3 child pages of a
 parent page). Like the following structure:

 Parent1
 Parent2
 Parent3
 -Child1
 -Child2
 -Child3
 Parent4

 If you set the "posts per page" to 5, with the original implementation
 you'll see the following results.

 First page from pagination:

 Parent1
 Parent2
 Parent3
 -Child1
 -Child2

 Second page from pagination:

 Parent3
 -Child3
 Parent4

 The patch skips the Child3 display (which is tricky itself to get the
 right number of entries transferred to the second page).

 That said, the second page would actually display 6 items instead of 5 due
 to Parent3 being duplicated in both pages 1 and 2.

 The other problem is that there are different types of ordering - by name,
 date etc., so I'm not sure that the patch would handle all of them
 gracefully even if we delegate the search queries to SQL and fetch the IDs
 only as we do now.

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Ticket URL: <https://core.trac.wordpress.org/ticket/15459#comment:31>
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