fixUserRegistration.php

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<?php
require_once __DIR__ . '/Maintenance.php';
 
class FixUserRegistration extends Maintenance {
    public function __construct() {
        parent::__construct();
        $this->addDescription( 'Fix the user_registration field' );
        $this->setBatchSize( 1000 );
    }
 
    public function execute() {
        $dbw = $this->getDB( DB_MASTER );
 
        $lastId = 0;
        do {
            // Get user IDs which need fixing
            $res = $dbw->select(
                'user',
                'user_id',
                [
                    'user_id > ' . $dbw->addQuotes( $lastId ),
                    'user_registration IS NULL'
                ],
                __METHOD__,
                [
                    'LIMIT' => $this->mBatchSize,
                    'ORDER BY' => 'user_id',
                ]
            );
            foreach ( $res as $row ) {
                $id = $row->user_id;
                $lastId = $id;
                // Get first edit time
                $timestamp = $dbw->selectField(
                    'revision',
                    'MIN(rev_timestamp)',
                    [ 'rev_user' => $id ],
                    __METHOD__
                );
                // Update
                if ( $timestamp !== null ) {
                    $dbw->update(
                        'user',
                        [ 'user_registration' => $timestamp ],
                        [ 'user_id' => $id ],
                        __METHOD__
                    );
                    $user = User::newFromId( $id );
                    $user->invalidateCache();
                    $this->output( "Set registration for #$id to $timestamp\n" );
                } else {
                    $this->output( "Could not find registration for #$id NULL\n" );
                }
            }
            $this->output( "Waiting for replica DBs..." );
            wfWaitForSlaves();
            $this->output( " done.\n" );
        } while ( $res->numRows() >= $this->mBatchSize );
    }
}
 
$maintClass = "FixUserRegistration";
require_once RUN_MAINTENANCE_IF_MAIN;