[wp-meta] [Making WordPress.org] #1880: Add redirect for old numeric topic/forum slugs (was: Add redirect for old numeric topic slugs)

[Making WordPress.org]

#1880: Add redirect for old numeric topic/forum slugs
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 Reporter:  ocean90               |       Owner:
     Type:  defect                |      Status:  new
 Priority:  normal                |   Milestone:
Component:  International Forums  |  Resolution:
 Keywords:                        |
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Old description:

> It seems like bbPress 1.x had a fallback to the topic ID, see
> https://www.google.com/search?q=site%3Ahttps%3A%2F%2Fja.forums.wordpress.org%2Ftopic%2F
>
> A possible solution:
>
> * Store the old topic ID in a meta field `_old_topic_id`
> * In the redirect handler check if the slug of a topic is numeric
> * Query post meta for `_old_topic_id`
> * If meta exists redirect to new slug (cache result)
> * If it doesn't exist continue with the regular redirect (cache result)

New description:

 It seems like bbPress 1.x had a fallback to the topic ID, see
 https://www.google.com/search?q=site%3Ahttps%3A%2F%2Fja.forums.wordpress.org%2Ftopic%2F
 and
 https://www.google.com/search?q=site%3Ahttps%3A%2F%2Fja.forums.wordpress.org%2Fforum%2F

 A possible solution:

 * Store the old topic ID in a meta field `_old_topic_id`
 * In the redirect handler check if the slug of a topic is numeric
 * Query post meta for `_old_topic_id`
 * If meta exists redirect to new slug (cache result)
 * If it doesn't exist continue with the regular redirect (cache result)

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Comment (by ocean90):

 We need the same for topics. (`_bbp_old_forum_id` exists too.)

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Ticket URL: <https://meta.trac.wordpress.org/ticket/1880#comment:2>
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