Getting row before and after a query

Question

I currently have this query

SELECT  short_url,
        type,
        file_thumbnail,
        file_embed,
        media.id,
        user,
        media.file_u         


        

Answer 1

Here's a couple key points your app should try to maintain:

• Don't load more data than necessary. (You don't know if the user will use the prev/next rows or not.)
• Make URLs sane, using stable URLs wherever possible. (The URL should not indicate that you want to be 3 next from row #127.)

Keeping those goals in mind, I'd recommend that on clicking the "next row" link, the page pulls the next row's ID, then redirects to the permalink for that row. So, for example:

http://example.com/media/1337/prev should run:

SELECT id FROM media WHERE media.id < 1337 ORDER BY media.id DESC LIMIT 1

And redirect to, presumably, http://example.com/media/1336.

http://example.com/media/1337/next should run:

SELECT id FROM media WHERE media.id > 1337 ORDER BY media.id ASC LIMIT 1

And redirect to, presumably, http://example.com/media/1338.