[wp-trac] [WordPress Trac] #35603: Allow `wp_count_posts()` on multisite after switching sites

[WordPress Trac]

#35603: Allow `wp_count_posts()` on multisite after switching sites
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 Reporter:  flixos90           |      Owner:
     Type:  defect (bug)       |     Status:  new
 Priority:  normal             |  Milestone:  Awaiting Review
Component:  Posts, Post Types  |    Version:  trunk
 Severity:  normal             |   Keywords:
  Focuses:  multisite          |
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 When switching sites on a multisite, there can be problems when using
 `wp_count_posts()`:

 Let's say you are on site X and site Y has a post type 'event' registered
 while site X does not have it. When you switch from X to Y using
 `switch_to_blog()` and then call `wp_count_posts( 'event' )`, there won't
 be any results since this post type does not exist on site X and since
 it's not possible to register post types per sites when switching between
 sites.

 I think we should only make the `post_type_exists()` control call when we
 can ensure that we've not switched sites. The function will still work
 properly without it. And since we can still correcly `get_posts()` of such
 a post type after switching sites, we should be able to also use
 `wp_count_posts()` correctly.

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Ticket URL: <https://core.trac.wordpress.org/ticket/35603>
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