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Removing user from organization decrements member counter twice if MySQL is used as DB #2101
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opened 2025-11-02 04:24:12 -06:00 by GiteaMirror
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Reference: github-starred/gitea#2101
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Originally created by @SagePtr on GitHub (Jul 26, 2018).
f847884d16[x]):Description
Removing user from organization removes user twice if MySQL is used as database.
How to reproduce:
User user2 is first removed from organization, then removed from team, but removeTeamMember function automatically checks if user is removed from last team he belongs to and calls removeOrgUser again.
removeOrgUser checks if user is team member, but when SQLite is used, this check passes first time and fails second time, but when MySQL is used, this check is passed both times and user deletion is triggered twice, member counter is decrementing twice.
Consequent adding and removing user from organization decreases counter and it becomes negative.
Digging into xorm.log showed me that
DELETE FROM `org_user` WHERE `id`=? AND `uid`=? AND `org_id`=? AND `id`=?is executed in place (before second check), but maybe it's executed out of transaction and row deletion is not visible to consequentSELECT `id`, `uid`, `org_id`, `is_public` FROM `org_user` WHERE (uid=?) AND (org_id=?) LIMIT 1inside transaction.I digged further and converted org_user table from InnoDB to MyISAM storage (MyISAM doesn't support transactions) and bug disappeared. Converting back to InnoDB returned bug. So it's very likely this issue is related to bad transaction handling.
Here is part of xorm.log (between BEGIN TRANSACTION and COMMIT):
MySQL (buggy):
SQLITE (correct):
Screenshots
After 8 consequent additions and removal of user:
