Empty fields in followers table

[Former user]

Reported by dbe: Somehow it occured that we have users who follow an 'empty' user:

mysql> select * from followers where f_user_name=''; +--------------+---------------+-------------+---------------------+ | followers_id | user_name | f_user_name | fellowship_date | +--------------+---------------+-------------+---------------------+ | 1906 | xxx | | 2009-07-30 09:10:20 | | 1913 | xxx | | 2009-08-01 16:45:32 | | 1967 | xxx | | 2009-08-14 10:02:15 | | 2017 | xxx | | 2009-09-04 08:57:27 | | 2033 | xxx | | 2009-09-09 08:50:07 | | 2044 | xxx | | 2009-09-12 09:10:40 | | 2207 | xxx | | 2009-10-09 13:45:18 | | 2219 | xxx | | 2009-10-17 03:42:55 | | 2285 | xxx | | 2009-11-02 12:20:44 | | 2418 | xxx | | 2009-11-30 03:53:29 | | 2558 | xxx | | 2010-02-12 08:11:35 | | 2561 | xxx | | 2010-02-14 06:12:59 | +--------------+---------------+-------------+---------------------+

This empty user cannot be deleted via the 'delete' link within the followers list. Please check how this can happen and fix.

[Stephan Doerfel]

Die leeren Follower gibt es noch. Wenn die Follower/Sphere-GEschichte resolved ist, muss das mit bedacht werden.

[Daniel Zoller]

We have to check which functions are still writing to followers one and why they are not writing to the new general spheres table

[Daniel Zoller]

empty fields will be removed from the friends table with version 3.7.0

we have already added checks to ensure that the target user exists