[wp-trac] [WordPress Trac] #18822: get_permalink() produces an add. DB request without $post->filter

[WordPress Trac]

#18822: get_permalink() produces an add. DB request without $post->filter
-------------------------+------------------------------
 Reporter:  F J Kaiser   |       Owner:
     Type:  enhancement  |      Status:  new
 Priority:  normal       |   Milestone:  Awaiting Review
Component:  Query        |     Version:  3.2.1
 Severity:  major        |  Resolution:
 Keywords:  needs-patch  |
-------------------------+------------------------------

Comment (by duck_):

 For the reasoning behind this code see #8526 and [10213]. "Don't cache
 filtered post objects. Set filter when getting sample permalink."

 Check get_post() and you'll see that that function doesn't always produce
 an additional query. For example:

 {{{
 $posts = get_posts();
 foreach ( $posts as $post )
     var_dump( get_permalink( $post->ID ) );
 }}}

 will not cause extra queries as all those posts are cached. You can also
 pass the whole $post object to get_permalink for no extra queries as
 get_post() accepts an object. In fact get_post() will only perform a query
 if you pass an object when the object has the filter property set ''and''
 that post ID isn't already cached.

 It seems to me that you must be doing something like direct DB queries to
 get post IDs and then using those to get permalinks. However you're doing
 it you're not getting posts added to the cache when retrieving them to
 pass to get_permalink().

-- 
Ticket URL: <http://core.trac.wordpress.org/ticket/18822#comment:2>
WordPress Trac <http://core.trac.wordpress.org/>
WordPress blogging software