migrate-schema2.php

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<?php
use MediaWiki\Maintenance\Maintenance;
 
// Standard boilerplate to define $IP
if ( getenv( 'MW_INSTALL_PATH' ) !== false ) {
    $IP = getenv( 'MW_INSTALL_PATH' );
} else {
    $dir = __DIR__;
    $IP = "$dir/../../..";
}
require_once "$IP/maintenance/Maintenance.php";
 
class TSchema2 extends Maintenance {
 
    public function __construct() {
        parent::__construct();
        $this->addDescription( 'Migrates database schema to version 2.' );
        $this->requireExtension( 'Translate' );
    }
 
    public function execute() {
        $dbw = $this->getDB( DB_PRIMARY );
 
        if ( !$dbw->tableExists( 'revtag', __METHOD__ ) ) {
            $this->fatalError( "Table revtag doesn't exist. Translate extension is not installed?" );
        }
 
        if ( !$dbw->tableExists( 'revtag_type', __METHOD__ ) ) {
            $this->fatalError( "Table revtag_type doesn't exist. Migration is already done." );
        }
 
        if ( $dbw->getType() !== 'mysql' ) {
            $this->error( 'This migration script only supports mysql. Please help ' .
                "us to write routine for {$dbw->getType()}.", 1 );
        }
 
        $table = $dbw->tableName( 'revtag' );
        $dbw->query( "ALTER TABLE $table MODIFY rt_type varbinary(60) not null", __METHOD__ );
 
        $res = $dbw->newSelectQueryBuilder()
            ->select( [ 'rtt_id', 'rtt_name' ] )
            ->from( 'revtag_type' )
            ->caller( __METHOD__ )
            ->fetchResultSet();
 
        foreach ( $res as $row ) {
            $dbw->newUpdateQueryBuilder()
                ->update( 'revtag' )
                ->set( [ 'rt_type' => $row->rtt_name ] )
                ->where( [ 'rt_type' => (string)$row->rtt_id ] )
                ->caller( __METHOD__ )
                ->execute();
        }
 
        $dbw->dropTable( 'revtag_type', __METHOD__ );
    }
}
 
$maintClass = TSchema2::class;
require_once RUN_MAINTENANCE_IF_MAIN;