Extension:UserMerge

Manual:Merging users redirects here. Not to be confused with Special:MergeAccount provided by Extension:CentralAuth which create a "global" account from local accounts in multiple wikis.

MediaWiki extensions manual

UserMerge Release status: stable
Implementation	Special page , User identity
Description	Merges references from one user to another user in the Wiki database - can also delete old users following merge
Author(s)	Tim Laqua Thomas Gries Siebrand Mazeland
Latest version	1.10.2
Compatibility policy	Snapshots releases along with MediaWiki. Master is not backward compatible.
Database changes	No
License	GNU General Public License 2.0 or later
Download	Download extension Git [?]: Download Git master browse repository (Phabricator · GitHub) commit history repository contributors (GitHub) code review
Parameters $wgUserMergeProtectedGroups $wgUserMergeEnableDelete
Added rights usermerge
Hooks used ContributionsToolLinks UserGetReservedNames
Hooks provided UserMergeAccountFields MergeAccountFromTo UserMergeAccountDeleteTables DeleteAccount
Quarterly downloads	299 (Ranked 11th)
Public wikis using	888 (Ranked 260th)
Translate the UserMerge extension if it is available at translatewiki.net
Vagrant role	usermerge
Issues	Open tasks · Report a bug

The UserMerge extension allows wiki users with the usermerge permission (Bureaucrat by default) to merge one Wiki user's account with another Wiki user's account.

Features

• merge (refer contributions, texts, watchlists, edit count of a first account A to a second account B)
• delete the first account A after the merge (option box)

Limitations

• you cannot delete a user A without having merged the user A to B
• you cannot merge your own account (logged-in user) into a different user

Notes

• if you omit the "New User" field, then the extension auto-populates the New User as "Anonymous" (user ID 0), and ask you to confirm a merge to Anonymous. This is used for user deletion: you first empty (merge to user 0) contributions of a user A, and then delete the user A.
  • If your version of the extension complains about an empty "New User" field you can fill in  "Anonymous"
• The extension creates a User Merge log and logs all User Merge extension activity.
• When user is merged, some actions listed in CheckUser stay as the old user and some actions go to the new user. When user is deleted, the actions that should be listed with the old account in CheckUser are gone.

Warning:

UserMerge is currently incompatible with either $wgSharedDB or CentralAuth.

Installation

• Download and move the extracted UserMerge folder to your extensions/ directory.
  Developers and code contributors should install the extension from Git instead, using:cd extensions/
git clone https://gerrit.wikimedia.org/r/mediawiki/extensions/UserMerge
• Add the following code at the bottom of your LocalSettings.php file:

  wfLoadExtension( 'UserMerge' );
  // By default nobody can use this function, enable for bureaucrat?
  $wgGroupPermissions['bureaucrat']['usermerge'] = true;
  
  // To enable for administrators add this:
  $wgGroupPermissions['sysop']['usermerge'] = true;
  
  // optional: default is [ 'sysop' ]
  $wgUserMergeProtectedGroups = [ 'groupname' ];
  

•  Done – Navigate to Special:Version on your wiki to verify that the extension is successfully installed.

Vagrant installation:

• If using Vagrant , install with vagrant roles enable usermerge --provision

Usage

• follow Installation Instructions
• a new Special Page Special:UserMerge with the title Merge and Delete Users is created
• unmergeable users can be defined (examples):

# Allow all users to be merged (by default, the 'sysop' group is unmergeable)
$wgUserMergeProtectedGroups = [];

# Disallow merging of the users in the 'sysop' or 'awesomeusers' groups
$wgUserMergeProtectedGroups = [ 'sysop', 'awesomeusers' ];

# enable the permission for sysops
$wgGroupPermissions['sysop']['usermerge'] = true;

You can use Help:RevisionDelete feature of MediaWiki to replace the UserMerge logs information with neutral information.

Active RevisionDelete in LocalSettings.php file with:

$wgGroupPermissions['sysop']['deletelogentry'] = true;
$wgGroupPermissions['sysop']['deleterevision'] = true;

Then, from Special:Log/usermerge, you can check and disable the logs content resulting from modifications made by UserMerge with simple check box.

See also

• hideuser right – Allows to "hide" users from various lists when indefinitely blocking them
• phab:T8397 – Flag to mark accounts locked/hidden (aka remove/delete user)