MediaWiki REL1_28
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24require_once __DIR__ . '/Maintenance.php';
34 public function __construct() {
35 parent::__construct();
36 $this->addDescription( 'Populates the rev_len and ar_len fields' );
37 $this->setBatchSize( 200 );
38 }
40 protected function getUpdateKey() {
41 return 'populate rev_len and ar_len';
42 }
44 public function doDBUpdates() {
45 $dbw = $this->getDB( DB_MASTER );
46 if ( !$dbw->tableExists( 'revision' ) ) {
47 $this->error( "revision table does not exist", true );
48 } elseif ( !$dbw->tableExists( 'archive' ) ) {
49 $this->error( "archive table does not exist", true );
50 } elseif ( !$dbw->fieldExists( 'revision', 'rev_len', __METHOD__ ) ) {
51 $this->output( "rev_len column does not exist\n\n", true );
53 return false;
54 }
56 $this->output( "Populating rev_len column\n" );
57 $rev = $this->doLenUpdates( 'revision', 'rev_id', 'rev', Revision::selectFields() );
59 $this->output( "Populating ar_len column\n" );
60 $ar = $this->doLenUpdates( 'archive', 'ar_id', 'ar', Revision::selectArchiveFields() );
62 $this->output( "rev_len and ar_len population complete "
63 . "[$rev revision rows, $ar archive rows].\n" );
65 return true;
66 }
75 protected function doLenUpdates( $table, $idCol, $prefix, $fields ) {
76 $dbr = $this->getDB( DB_REPLICA );
77 $dbw = $this->getDB( DB_MASTER );
78 $start = $dbw->selectField( $table, "MIN($idCol)", false, __METHOD__ );
79 $end = $dbw->selectField( $table, "MAX($idCol)", false, __METHOD__ );
80 if ( !$start || !$end ) {
81 $this->output( "...$table table seems to be empty.\n" );
83 return 0;
84 }
86 # Do remaining chunks
87 $blockStart = intval( $start );
88 $blockEnd = intval( $start ) + $this->mBatchSize - 1;
89 $count = 0;
91 while ( $blockStart <= $end ) {
92 $this->output( "...doing $idCol from $blockStart to $blockEnd\n" );
93 $res = $dbr->select(
94 $table,
95 $fields,
96 [
97 "$idCol >= $blockStart",
98 "$idCol <= $blockEnd",
99 "{$prefix}_len IS NULL"
100 ],
101 __METHOD__
102 );
104 if ( $res->numRows() > 0 ) {
105 $this->beginTransaction( $dbw, __METHOD__ );
106 # Go through and update rev_len from these rows.
107 foreach ( $res as $row ) {
108 if ( $this->upgradeRow( $row, $table, $idCol, $prefix ) ) {
109 $count++;
110 }
111 }
112 $this->commitTransaction( $dbw, __METHOD__ );
113 }
115 $blockStart += $this->mBatchSize;
116 $blockEnd += $this->mBatchSize;
118 }
120 return $count;
121 }
130 protected function upgradeRow( $row, $table, $idCol, $prefix ) {
131 $dbw = $this->getDB( DB_MASTER );
133 $rev = ( $table === 'archive' )
135 : new Revision( $row );
137 $content = $rev->getContent();
138 if ( !$content ) {
139 # This should not happen, but sometimes does (bug 20757)
140 $id = $row->$idCol;
141 $this->output( "Content of $table $id unavailable!\n" );
143 return false;
144 }
146 # Update the row...
147 $dbw->update( $table,
148 [ "{$prefix}_len" => $content->getSize() ],
149 [ $idCol => $row->$idCol ],
150 __METHOD__
151 );
153 return true;
154 }
157$maintClass = "PopulateRevisionLength";
158require_once RUN_MAINTENANCE_IF_MAIN;
wfWaitForSlaves( $ifWritesSince=null, $wiki=false, $cluster=false, $timeout=null)
Waits for the replica DBs to catch up to the master position.
Class for scripts that perform database maintenance and want to log the update in updatelog so we can...
error( $err, $die=0)
Throw an error to the user.
int $mBatchSize
Batch size.
beginTransaction(IDatabase $dbw, $fname)
Begin a transcation on a DB.
commitTransaction(IDatabase $dbw, $fname)
Commit the transcation on a DB handle and wait for replica DBs to catch up.
getDB( $db, $groups=[], $wiki=false)
Returns a database to be used by current maintenance script.
addDescription( $text)
Set the description text.
setBatchSize( $s=0)
Set the batch size.
Maintenance script that populates the rev_len and ar_len fields when they are NULL.
doLenUpdates( $table, $idCol, $prefix, $fields)
Default constructor.
Do the actual work.
upgradeRow( $row, $table, $idCol, $prefix)
Get the update key name to go in the update log table.
static selectArchiveFields()
Return the list of revision fields that should be selected to create a new revision from an archive r...
Definition Revision.php:473
static selectFields()
Return the list of revision fields that should be selected to create a new revision.
Definition Revision.php:442
static newFromArchiveRow( $row, $overrides=[])
Make a fake revision object from an archive table row.
Definition Revision.php:183
Definition database.txt:21
design txt This is a brief overview of the new design More thorough and up to date information is available on the documentation wiki at etc Handles the details of getting and saving to the user table of the and dealing with sessions and cookies OutputPage Encapsulates the entire HTML page that will be sent in response to any server request It is used by calling its functions to add in any and then calling output() to send it all. It could be easily changed to send incrementally if that becomes useful
This document is intended to provide useful advice for parties seeking to redistribute MediaWiki to end users It s targeted particularly at maintainers for Linux since it s been observed that distribution packages of MediaWiki often break We ve consistently had to recommend that users seeking support use official tarballs instead of their distribution s and this often solves whatever problem the user is having It would be nice if this could such as
this hook is for auditing only RecentChangesLinked and Watchlist RecentChangesLinked and Watchlist e g Watchlist removed from all revisions and log entries to which it was applied This gives extensions a chance to take it off their books as the deletion has already been partly carried out by this point or something similar the user will be unable to create the tag set and then return false from the hook function Ensure you consume the ChangeTagAfterDelete hook to carry out custom deletion actions as context called by AbstractContent::getParserOutput May be used to override the normal model specific rendering of page content $content
Definition hooks.txt:1094
presenting them properly to the user as errors is done by the caller return true use this to change the list i e etc $rev
Definition hooks.txt:1734
injection txt This is an overview of how MediaWiki makes use of dependency injection The design described here grew from the discussion of RFC T384 The term dependency this means that anything an object needs to operate should be injected from the the object itself should only know narrow no concrete implementation of the logic it relies on The requirement to inject everything typically results in an architecture that based on two main types of and essentially stateless service objects that use other service objects to operate on the value objects As of the beginning MediaWiki is only starting to use the DI approach Much of the code still relies on global state or direct resulting in a highly cyclical dependency which acts as the top level factory for services in MediaWiki which can be used to gain access to default instances of various services MediaWikiServices however also allows new services to be defined and default services to be redefined Services are defined or redefined by providing a callback the instantiator that will return a new instance of the service When it will create an instance of MediaWikiServices and populate it with the services defined in the files listed by thereby bootstrapping the DI framework Per $wgServiceWiringFiles lists includes ServiceWiring php
Definition injection.txt:37
Definition defines.php:22
Definition defines.php:23