To my knowledge, we have never added Guest Authors, but at some point two were somehow created on my blog with names/slugs/emails identical to existing Users on the blog. Not quite sure how these were generated--at what point are Guest Authors generated?
But the bigger issue is that with these "duplicate" Guest Authors (duplicate in the sense that their post_title is the same as an existing User's slug), they collide with the actual User within get_coauthors(). Now, when I iterate through the results of get_coauthors(), I get back the ID of the wp_posts Guest Author instead of the ID of the wp_users User. I then go on to display the completely wrong avatar and user information. In our situation, all of a sudden, a random User appears to be the author of the page.
When I go into the Users>Guest Authors and delete these Guest Authors, things return to normal. So I guess this brings up several issues:
- Under what circumstances are guest authors created? I want to better understand how these "dupes" were silently created.
- Can you not create a guest author if a User with this slug already exists? This seems a bad idea regardless of whether you fix collisions downstream.
- When there exists a User and a Guest Author with the same slug/post_title, shouldn't you defer to the User? I think some changes to the get_coauthors() function are necessary to avoid this collision.
Thanks for the terrific plugin and I hope that this helps you track down the problems I describe.