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Upgrading to WordPress 2.6.2 - missing categories
September 14, 2008
I just upgraded from WP 2.2 to WP 2.6.2 and things went well enough, but my listing of categories disappeared when I went to Manage > Categories in the Dashboard. I looked at some posts to see if they had the appropriate categories in the post metadata, and they did, so I knew that some vestiges of my categorizing were in the database. (WP 2.6.2 installation does an automatic “Upgrade” of the database, by the way, so always backup the database before upgrading.)
After looking at some truly arcane solutions on the Web, I decided I’d try something simpler. I am using the Revolution Theme, and in that theme all categories must be subcategories of a category named “Blog.” So I recreated the Blog category, and everything worked fine. Post metadata is still correct, and under Manage > Categories, the blog category with all of the subcategories I had created before were there. Whew!
And wordpress.org deserves a big smack upside the head. They changed the wp_categories table in the database to wp_taxonomy without giving folks who read the upgrade instructions any info at all. I’m not sure if that is what messed things up, but there is a reported bug about categories disappearing and they know about it. A warning and a workaround would have been nice. Shame on them
As ever, always make a backup of your WP files and folders, as well as your WordPress database before upgrading or making other big changes to your blog.
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