4 * Class for handling database updates. Roughly based off of updaters.inc, with
5 * a few improvements :)
10 abstract class DatabaseUpdater
{
13 * Array of updates to perform on the database
17 protected $updates = array();
21 protected $shared = false;
23 protected $postDatabaseUpdateMaintenance = array(
24 'DeleteDefaultMessages'
27 protected function __construct( $db, $shared ) {
29 $this->shared
= $shared;
32 public static function newForDB( $db, $shared ) {
33 $type = $db->getType();
34 if( in_array( $type, Installer
::getDBTypes() ) ) {
35 $class = ucfirst( $type ) . 'Updater';
36 return new $class( $db, $shared );
38 throw new MWException( __METHOD__
. ' called for unsupported $wgDBtype' );
42 public function getDB() { return $this->db
; }
44 public function getPostDatabaseUpdateMaintenance() {
45 return $this->postDatabaseUpdateMaintenance
;
48 public function doUpdates() {
49 global $IP, $wgVersion;
50 require_once( "$IP/maintenance/updaters.inc" );
51 $this->updates
= array_merge( $this->getCoreUpdateList(),
52 $this->getOldGlobalUpdates() );
53 foreach ( $this->updates
as $params ) {
54 $func = array_shift( $params );
55 call_user_func_array( $func, $params );
58 $this->setAppliedUpdates( $wgVersion, $this->updates
);
61 protected function setAppliedUpdates( $version, $updates = array() ) {
62 if( !$this->canUseNewUpdatelog() ) {
65 $key = "updatelist-$version-" . time();
66 $this->db
->insert( 'updatelog',
67 array( 'ul_key' => $key, 'ul_value' => serialize( $updates ) ),
72 * Updatelog was changed in 1.17 to have a ul_value column so we can record
73 * more information about what kind of updates we've done (that's what this
74 * class does). Pre-1.17 wikis won't have this column, and really old wikis
75 * might not even have updatelog at all
79 protected function canUseNewUpdatelog() {
80 return $this->db
->tableExists( 'updatelog' ) &&
81 $this->db
->fieldExists( 'updatelog', 'ul_value' );
85 * Before 1.17, we used to handle updates via stuff like $wgUpdates,
86 * $wgExtNewTables/Fields/Indexes. This is nasty :) We refactored a lot
87 * of this in 1.17 but we want to remain back-compatible for awhile. So
88 * load up these old global-based things into our update list. We can't
89 * version these like we do with our core updates, so they have to go
92 private function getOldGlobalUpdates() {
93 global $wgUpdates, $wgExtNewFields, $wgExtNewTables,
94 $wgExtModifiedFields, $wgExtNewIndexes, $wgSharedDB, $wgSharedTables;
96 $doUser = $this->shared ?
97 $wgSharedDB && in_array( 'user', $wgSharedTables ) :
98 !$wgSharedDB ||
!in_array( 'user', $wgSharedTables );
102 if( isset( $wgUpdates[ $this->db
->getType() ] ) ) {
103 foreach( $wgUpdates[ $this->db
->getType() ] as $upd ) {
108 foreach ( $wgExtNewTables as $tableRecord ) {
110 'add_table', $tableRecord[0], $tableRecord[1], true
114 foreach ( $wgExtNewFields as $fieldRecord ) {
115 if ( $fieldRecord[0] != 'user' ||
$doUser ) {
117 'add_field', $fieldRecord[0], $fieldRecord[1],
118 $fieldRecord[2], true
123 foreach ( $wgExtNewIndexes as $fieldRecord ) {
125 'add_index', $fieldRecord[0], $fieldRecord[1],
126 $fieldRecord[2], true
130 foreach ( $wgExtModifiedFields as $fieldRecord ) {
132 'modify_field', $fieldRecord[0], $fieldRecord[1],
133 $fieldRecord[2], true
141 * Get an array of updates to perform on the database. Should return a
142 * mutli-dimensional array. The main key is the MediaWiki version (1.12,
143 * 1.13...) with the values being arrays of updates, identical to how
144 * updaters.inc did it (for now)
148 protected abstract function getCoreUpdateList();
151 class OracleUpdater
extends DatabaseUpdater
{
152 protected function getCoreUpdateList() {