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silverstripe-framework/core/model/Versioned.php

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<?php
/**
* The Versioned decorator allows your DataObjects to have several versions, allowing
* you to rollback changes and view history. An example of this is the pages used in the CMS.
* @package sapphire
* @subpackage model
*/
class Versioned extends DataObjectDecorator {
/**
* An array of possible stages.
* @var array
*/
protected $stages;
/**
* The 'default' stage.
* @var string
*/
protected $defaultStage;
/**
* The 'live' stage.
* @var string
*/
protected $liveStage;
/**
* A version that a DataObject should be when it is 'migrating',
* that is, when it is in the process of moving from one stage to another.
* @var string
*/
public $migratingVersion;
/**
* A cache used by get_versionnumber_by_stage().
* Clear through {@link flushCache()}.
*
* @var array
*/
protected static $cache_versionnumber;
/**
* Construct a new Versioned object.
* @var array $stages The different stages the versioned object can be.
* The first stage is consiedered the 'default' stage, the last stage is
* considered the 'live' stage.
*/
function __construct($stages) {
parent::__construct();
if(!is_array($stages)) {
$stages = func_get_args();
}
$this->stages = $stages;
$this->defaultStage = reset($stages);
$this->liveStage = array_pop($stages);
}
function extraStatics() {
return array(
'has_many' => array(
'Versions' => 'SiteTree',
)
);
}
function augmentSQL(SQLQuery &$query) {
// Get the content at a specific date
if($date = Versioned::$reading_archived_date) {
foreach($query->from as $table => $dummy) {
if(!isset($baseTable)) {
$baseTable = $table;
}
$query->renameTable($table, $table . '_versions');
$query->replaceText(".ID", ".RecordID");
$query->select[] = "\"{$baseTable}_versions\".RecordID AS ID";
if($table != $baseTable) {
$query->from[$table] .= " AND \"{$table}_versions\".Version = \"{$baseTable}_versions\".Version";
}
}
// Link to the version archived on that date
$this->requireArchiveTempTable($baseTable, $date);
$query->from["_Archive$baseTable"] = "INNER JOIN \"_Archive$baseTable\"
ON \"_Archive$baseTable\".RecordID = \"{$baseTable}_versions\".RecordID
AND \"_Archive$baseTable\".Version = \"{$baseTable}_versions\".Version";
// Get a specific stage
} else if(Versioned::$reading_stage && Versioned::$reading_stage != $this->defaultStage
&& array_search(Versioned::$reading_stage,$this->stages) !== false) {
foreach($query->from as $table => $dummy) {
$query->renameTable($table, $table . '_' . Versioned::$reading_stage);
}
}
}
/**
* Temporary table mapping each database record to its version on the given date.
* Created by requireArchiveTempTable().
* @var array
*/
protected static $createdArchiveTempTable = array();
/**
* Create a temporary table mapping each database record to its version on the given date.
* This is used by the versioning system to return database content on that date.
* @param string $baseTable The base table.
* @param string $date The date.
* @todo Ensure that this is DB abstracted
*/
protected function requireArchiveTempTable($baseTable, $date) {
if(!isset(self::$createdArchiveTempTable[$baseTable])) {
self::$createdArchiveTempTable[$baseTable] = true;
DB::query("CREATE TEMPORARY TABLE \"_Archive$baseTable\" (
\"RecordID\" INT NOT NULL PRIMARY KEY,
\"Version\" INT NOT NULL
)");
DB::query("INSERT INTO \"_Archive$baseTable\"
SELECT \"RecordID\", max(\"Version\") FROM \"{$baseTable}_versions\"
WHERE \"LastEdited\" <= '$date'
GROUP BY \"RecordID\"");
}
}
/**
* An array of DataObject extensions that may require versioning for extra tables
* The array value is a set of suffixes to form these table names, assuming a preceding '_'.
* E.g. if Extension1 creates a new table 'Class_suffix1'
* and Extension2 the tables 'Class_suffix2' and 'Class_suffix3':
*
* $versionableExtensions = array(
* 'Extension1' => 'suffix1',
* 'Extension2' => array('suffix2', 'suffix3'),
* );
*
* Make sure your extension has a static $enabled-property that determines if it is
* processed by Versioned.
*
* @var array
*/
protected static $versionableExtensions = array('Translatable' => 'lang');
function augmentDatabase() {
$classTable = $this->owner->class;
// Build a list of suffixes whose tables need versioning
$allSuffixes = array();
foreach (Versioned::$versionableExtensions as $versionableExtension => $suffixes) {
if ($this->owner->hasExtension($versionableExtension) && singleton($versionableExtension)->stat('enabled')) {
$allSuffixes = array_merge($allSuffixes, (array)$suffixes);
foreach ((array)$suffixes as $suffix) {
$allSuffixes[$suffix] = $versionableExtension;
}
}
}
// Add the default table with an empty suffix to the list (table name = class name)
array_push($allSuffixes,'');
foreach ($allSuffixes as $key => $suffix) {
// check that this is a valid suffix
if (!is_int($key)) continue;
if ($suffix) $table = "{$classTable}_$suffix";
else $table = $classTable;
if(($fields = $this->owner->databaseFields())) {
$indexes = $this->owner->databaseIndexes();
if($this->owner->parentClass() == "DataObject") {
$rootTable = true;
}
if ($suffix && ($ext = $this->owner->extInstance($allSuffixes[$suffix]))) {
if (!$ext->isVersionedTable($table)) continue;
$fields = $ext->fieldsInExtraTables($suffix);
$indexes = $fields['indexes'];
$fields = $fields['db'];
}
// Create tables for other stages
foreach($this->stages as $stage) {
// Extra tables for _Live, etc.
if($stage != $this->defaultStage) {
DB::requireTable("{$table}_$stage", $fields, $indexes);
/*
if(!DB::query("SELECT * FROM {$table}_$stage")->value()) {
$fieldList = implode(", ",array_keys($fields));
DB::query("INSERT INTO \"{$table}_$stage\" (ID,$fieldList)
SELECT ID,$fieldList FROM \"$table\"");
}
*/
}
// Version fields on each root table (including Stage)
if(isset($rootTable)) {
$stageTable = ($stage == $this->defaultStage) ? $table : "{$table}_$stage";
//DB::requireField($stageTable, "Version", "int(11) not null default '0'");
$parts=Array('datatype'=>'int', 'precision'=>11, 'null'=>'not null', 'default'=>(int)0);
$values=Array('type'=>'int', 'parts'=>$parts);
DB::requireField($stageTable, 'Version', $values);
}
}
// Create table for all versions
$versionFields = array_merge(
array(
"RecordID" => "Int",
"Version" => "Int",
"WasPublished" => "Boolean",
"AuthorID" => "Int",
"PublisherID" => "Int"
),
(array)$fields
);
$versionIndexes = array_merge(
array(
'RecordID_Version' => '(RecordID, Version)',
'RecordID' => true,
'Version' => true,
'AuthorID' => true,
'PublisherID' => true,
),
(array)$indexes
);
DB::requireTable("{$table}_versions", $versionFields, $versionIndexes);
/*
if(!DB::query("SELECT * FROM {$table}_versions")->value()) {
$fieldList = implode(", ",array_keys($fields));
DB::query("INSERT INTO \"{$table}_versions\" ($fieldList, RecordID, Version)
SELECT $fieldList, ID AS RecordID, 1 AS Version FROM \"$table\"");
}
*/
} else {
DB::dontRequireTable("{$table}_versions");
foreach($this->stages as $stage) {
if($stage != $this->defaultStage) DB::dontrequireTable("{$table}_$stage");
}
}
}
}
/**
* Augment a write-record request.
* @param SQLQuery $manipulation Query to augment.
*/
function augmentWrite(&$manipulation) {
$tables = array_keys($manipulation);
$version_table = array();
foreach($tables as $table) {
// Make sure that the augmented write is being applied to a table that can be versioned
if( !$this->canBeVersioned($table) ) {
// Debug::message( "$table doesn't exist or has no database fields" );
unset($manipulation[$table]);
continue;
}
$id = $manipulation[$table]['id'] ? $manipulation[$table]['id'] : $manipulation[$table]['fields']['ID'];//echo 'id' .$id.' from '.$manipulation[$table]['id'].' and '.$manipulation[$table]['fields']['ID']."\n\n<br><br>";
if(!$id) user_error("Couldn't find ID in " . var_export($manipulation[$table], true), E_USER_ERROR);
$rid = isset($manipulation[$table]['RecordID']) ? $manipulation[$table]['RecordID'] : $id;
$newManipulation = array(
"command" => "insert",
"fields" => isset($manipulation[$table]['fields']) ? $manipulation[$table]['fields'] : null
);
if($this->migratingVersion) {
$manipulation[$table]['fields']['Version'] = $this->migratingVersion;
}
// If we haven't got a version #, then we're creating a new version. Otherwise, we're just
// copying a version to another table
if(!isset($manipulation[$table]['fields']['Version'])) {
// Add any extra, unchanged fields to the version record.
$data = DB::query("SELECT * FROM \"$table\" WHERE \"ID\" = $id")->record();
if($data) foreach($data as $k => $v) {
if (!isset($newManipulation['fields'][$k])) $newManipulation['fields'][$k] = "'" . addslashes($v) . "'";
}
// Set up a new entry in (table)_versions
$newManipulation['fields']['RecordID'] = $rid;
unset($newManipulation['fields']['ID']);
// Create a new version #
if (isset($version_table[$table])) $nextVersion = $version_table[$table];
else unset($nextVersion);
if($rid && !isset($nextVersion)) $nextVersion = DB::query("SELECT MAX(\"Version\") + 1 FROM \"{$table}_versions\" WHERE \"RecordID\" = $rid")->value();
$newManipulation['fields']['Version'] = $nextVersion ? $nextVersion : 1;
$newManipulation['fields']['AuthorID'] = Member::currentUserID() ? Member::currentUserID() : 0;
$manipulation["{$table}_versions"] = $newManipulation;
// Add the version number to this data
$manipulation[$table]['fields']['Version'] = $newManipulation['fields']['Version'];
$version_table[$table] = $nextVersion;
}
// Putting a Version of -1 is a signal to leave the version table alone, despite their being no version
if($manipulation[$table]['fields']['Version'] < 0) unset($manipulation[$table]['fields']['Version']);
if(!$this->hasVersionField($table)) unset($manipulation[$table]['fields']['Version']);
// Grab a version number - it should be the same across all tables.
if(isset($manipulation[$table]['fields']['Version'])) $thisVersion = $manipulation[$table]['fields']['Version'];
// If we're editing Live, then use (table)_Live instead of (table)
if(Versioned::$reading_stage && Versioned::$reading_stage != $this->defaultStage) {
$newTable = $table . '_' . Versioned::$reading_stage;
$manipulation[$newTable] = $manipulation[$table];
unset($manipulation[$table]);
}
}
// Add the new version # back into the data object, for accessing after this write
if(isset($thisVersion)) $this->owner->Version = str_replace("'","",$thisVersion);
}
/**
* Determine if a table is supporting the Versioned extensions (e.g. $table_versions does exists)
*
* @param string $table Table name
* @return boolean
*/
function canBeVersioned($table) {
$dbFields = singleton($table)->databaseFields();
return !(!ClassInfo::exists($table) || !is_subclass_of($table, 'DataObject' ) || empty( $dbFields ));
}
/**
* Check if a certain table has the 'Version' field
*
* @param string $table Table name
* @return boolean Returns false if the field isn't in the table, true otherwise
*/
function hasVersionField($table) {
$tableParts = explode('_',$table);
return ('DataObject' == get_parent_class($tableParts[0]));
}
function extendWithSuffix($table) {
foreach (Versioned::$versionableExtensions as $versionableExtension => $suffixes) {
if ($this->owner->hasExtension($versionableExtension)) {
$table = $this->owner->extInstance($versionableExtension)->extendWithSuffix($table);
}
}
return $table;
}
//-----------------------------------------------------------------------------------------------//
/**
* Get the latest published DataObject.
* @return DataObject
*/
function latestPublished() {
// Get the root data object class - this will have the version field
$table1 = $this->owner->class;
while( ($p = get_parent_class($table1)) != "DataObject") $table1 = $p;
$table2 = $table1 . "_$this->liveStage";
return DB::query("SELECT \"$table1\".\"Version\" = \"$table2\".\"Version\" FROM \"$table1\" INNER JOIN \"$table2\" ON \"$table1\".\"ID\" = \"$table2\".\"ID\" WHERE \"$table1\".\"ID\" = ". $this->owner->ID)->value();
}
/**
* Move a database record from one stage to the other.
* @param fromStage Place to copy from. Can be either a stage name or a version number.
* @param toStage Place to copy to. Must be a stage name.
* @param createNewVersion Set this to true to create a new version number. By default, the existing version number will be copied over.
*/
function publish($fromStage, $toStage, $createNewVersion = false) {
$baseClass = $this->owner->class;
while( ($p = get_parent_class($baseClass)) != "DataObject") $baseClass = $p;
$extTable = $this->extendWithSuffix($baseClass);//die($extTable);
if(is_numeric($fromStage)) {
$from = Versioned::get_version($this->owner->class, $this->owner->ID, $fromStage);
} else {
$this->owner->flushCache();
$from = Versioned::get_one_by_stage($this->owner->class, $fromStage, "\"{$baseClass}\".\"ID\" = {$this->owner->ID}");
}
$publisherID = isset(Member::currentUser()->ID) ? Member::currentUser()->ID : 0;
if($from) {
$from->forceChange();
if(!$createNewVersion) $from->migrateVersion($from->Version);
// Mark this version as having been published at some stage
DB::query("UPDATE \"{$extTable}_versions\" SET \"WasPublished\" = '1', \"PublisherID\" = $publisherID WHERE \"RecordID\" = $from->ID AND \"Version\" = $from->Version");
$oldStage = Versioned::$reading_stage;
Versioned::$reading_stage = $toStage;
$from->write();
$from->destroy();
Versioned::$reading_stage = $oldStage;
} else {
user_error("Can't find {$this->owner->URLSegment}/{$this->owner->ID} in stage $fromStage", E_USER_WARNING);
}
}
/**
* Set the migrating version.
* @param string $version The version.
*/
function migrateVersion($version) {
$this->migratingVersion = $version;
}
/**
* Compare two stages to see if they're different.
* Only checks the version numbers, not the actual content.
* @param string $stage1 The first stage to check.
* @param string $stage2
*/
function stagesDiffer($stage1, $stage2) {
$table1 = $this->baseTable($stage1);
$table2 = $this->baseTable($stage2);
if(!is_numeric($this->owner->ID)) {
return true;
}
// We test for equality - if one of the versions doesn't exist, this will be false
//TODO: DB Abstraction: if statement here:
$stagesAreEqual = DB::query("SELECT CASE WHEN \"$table1\".\"Version\"=\"$table2\".\"Version\" THEN 1 ELSE 0 END FROM \"$table1\" INNER JOIN \"$table2\" ON \"$table1\".\"ID\" = \"$table2\".\"ID\" AND \"$table1\".\"ID\" = {$this->owner->ID}")->value();
return !$stagesAreEqual;
}
function Versions($filter = "") {
return $this->allVersions($filter);
}
/**
* Return a list of all the versions available.
* @param string $filter
*/
function allVersions($filter = "") {
$query = $this->owner->extendedSQL($filter,"");
foreach($query->from as $table => $join) {
if($join[0] == '"') $baseTable = str_replace('"','',$join);
else if (substr($join,0,5) != 'INNER') $query->from[$table] = "LEFT JOIN \"$table\" ON \"$table\".RecordID = \"{$baseTable}_versions\".RecordID AND \"$table\".Version = \"{$baseTable}_versions\".Version";
$query->renameTable($table, $table . '_versions');
}
$query->select[] = "\"{$baseTable}_versions\".AuthorID, \"{$baseTable}_versions\".Version, \"{$baseTable}_versions\".RecordID";
$query->where[] = "\"{$baseTable}_versions\".RecordID = '{$this->owner->ID}'";
$query->orderby = "\"{$baseTable}_versions\".LastEdited DESC, \"{$baseTable}_versions\".Version DESC";
$records = $query->execute();
$versions = new DataObjectSet();
foreach($records as $record) {
$versions->push(new Versioned_Version($record));
}
return $versions;
}
/**
* Compare two version, and return the diff between them.
* @param string $from The version to compare from.
* @param string $to The version to compare to.
* @return DataObject
*/
function compareVersions($from, $to) {
$fromRecord = Versioned::get_version($this->owner->class, $this->owner->ID, $from);
$toRecord = Versioned::get_version($this->owner->class, $this->owner->ID, $to);
$fields = array_keys($fromRecord->getAllFields());
foreach($fields as $field) {
if(in_array($field, array("ID","Version","RecordID","AuthorID", "ParentID"))) continue;
$fromRecord->$field = Diff::compareHTML($fromRecord->$field, $toRecord->$field);
}
return $fromRecord;
}
/**
* Return the base table - the class that directly extends DataObject.
* @return string
*/
function baseTable($stage = null) {
$tableClasses = ClassInfo::dataClassesFor($this->owner->class);
$baseClass = array_shift($tableClasses);
return (!$stage || $stage == $this->defaultStage) ? $baseClass : $baseClass . "_$stage";
}
//-----------------------------------------------------------------------------------------------//
/**
* Choose the stage the site is currently on.
* If $_GET['stage'] is set, then it will use that stage, and store it in the session.
* if $_GET['archiveDate'] is set, it will use that date, and store it in the session.
* If neither of these are set, it checks the session, otherwise the stage is set to 'Live'.
*/
static function choose_site_stage() {
if(isset($_GET['stage'])) {
$_GET['stage'] = ucfirst(strtolower($_GET['stage']));
Session::set('currentStage', $_GET['stage']);
Session::clear('archiveDate');
}
if(isset($_GET['archiveDate'])) {
Session::set('archiveDate', $_GET['archiveDate']);
}
if(Session::get('archiveDate')) {
Versioned::reading_archived_date(Session::get('archiveDate'));
} else if(Session::get('currentStage')) {
Versioned::reading_stage(Session::get('currentStage'));
} else {
Versioned::reading_stage("Live");
}
}
/**
* Get the name of the 'live' stage.
* @return string
*/
static function get_live_stage() {
return "Live";
}
/**
* Get the current reading stage.
* @return string
*/
static function current_stage() {
return Versioned::$reading_stage;
}
/**
* Get the current archive date.
* @return string
*/
static function current_archived_date() {
return Versioned::$reading_archived_date;
}
/**
* Set the reading stage.
* @param string $stage New reading stage.
*/
static function reading_stage($stage) {
Versioned::$reading_stage = $stage;
}
/**
* Set the reading archive date.
* @param string $date New reading archived date.
*/
static function reading_archived_date($date) {
Versioned::$reading_archived_date = $date;
}
/**
* Get a singleton instance of a class in the given stage.
*
* @param string $class The name of the class.
* @param string $stage The name of the stage.
* @param string $filter A filter to be inserted into the WHERE clause.
* @param boolean $cache Use caching.
* @param string $orderby A sort expression to be inserted into the ORDER BY clause.
* @return DataObject
*/
static function get_one_by_stage($class, $stage, $filter = '', $cache = true, $orderby = '') {
$oldStage = Versioned::$reading_stage;
Versioned::$reading_stage = $stage;
singleton($class)->flushCache();
$result = DataObject::get_one($class, $filter, $cache, $orderby);
singleton($class)->flushCache();
Versioned::$reading_stage = $oldStage;
return $result;
}
/**
* Gets the current version number of a specific record.
*
* @param string $class
* @param string $stage
* @param int $id
* @param boolean $cache
* @return int
*/
static function get_versionnumber_by_stage($class, $stage, $id, $cache = true) {
$baseClass = ClassInfo::baseDataClass($class);
$stageTable = ($stage == 'Stage') ? $baseClass : "{$baseClass}_{$stage}";
// cached call
if($cache && isset(self::$cache_versionnumber[$baseClass][$stage][$id])) {
return self::$cache_versionnumber[$baseClass][$stage][$id];
}
// get version as performance-optimized SQL query (gets called for each page in the sitetree)
$version = DB::query("SELECT Version FROM `$stageTable` WHERE ID = $id")->value();
// cache value (if required)
if($cache) {
if(!isset(self::$cache_versionnumber[$baseClass])) self::$cache_versionnumber[$baseClass] = array();
if(!isset(self::$cache_versionnumber[$baseClass][$stage])) self::$cache_versionnumber[$baseClass][$stage] = array();
self::$cache_versionnumber[$baseClass][$stage][$id] = $version;
}
return $version;
}
/**
* Get a set of class instances by the given stage.
*
* @param string $class The name of the class.
* @param string $stage The name of the stage.
* @param string $filter A filter to be inserted into the WHERE clause.
* @param string $sort A sort expression to be inserted into the ORDER BY clause.
* @param string $join A join expression, such as LEFT JOIN or INNER JOIN
* @param int $limit A limit on the number of records returned from the database.
* @param string $containerClass The container class for the result set (default is DataObjectSet)
* @return DataObjectSet
*/
static function get_by_stage($class, $stage, $filter = '', $sort = '', $join = '', $limit = '', $containerClass = 'DataObjectSet') {
$oldStage = Versioned::$reading_stage;
Versioned::$reading_stage = $stage;
$result = DataObject::get($class, $filter, $sort, $join, $limit, $containerClass);
Versioned::$reading_stage = $oldStage;
return $result;
}
function deleteFromStage($stage) {
$oldStage = Versioned::$reading_stage;
Versioned::$reading_stage = $stage;
$result = $this->owner->delete();
Versioned::$reading_stage = $oldStage;
return $result;
}
function writeToStage($stage, $forceInsert = false) {
$oldStage = Versioned::$reading_stage;
Versioned::$reading_stage = $stage;
$result = $this->owner->write(false, $forceInsert);
Versioned::$reading_stage = $oldStage;
return $result;
}
/**
* Build a SQL query to get data from the _version table.
* This function is similar in style to {@link DataObject::buildSQL}
*/
function buildVersionSQL($filter = "", $sort = "") {
$query = $this->owner->extendedSQL($filter,$sort);
foreach($query->from as $table => $join) {
if($join[0] == '"') $baseTable = str_replace('"','',$join);
else $query->from[$table] = "LEFT JOIN \"$table\" ON \"$table\".RecordID = \"{$baseTable}_versions\".RecordID AND \"$table\".Version = \"{$baseTable}_versions\".Version";
$query->renameTable($table, $table . '_versions');
}
$query->select[] = "\"{$baseTable}_versions\".AuthorID, \"{$baseTable}_versions\".Version, \"{$baseTable}_versions\".RecordID AS ID";
return $query;
}
static function build_version_sql($className, $filter = "", $sort = "") {
$query = singleton($className)->extendedSQL($filter,$sort);
foreach($query->from as $table => $join) {
if($join[0] == '"') $baseTable = str_replace('"','',$join);
else $query->from[$table] = "LEFT JOIN \"$table\" ON \"$table\".RecordID = \"{$baseTable}_versions\".RecordID AND \"$table\".Version = \"{$baseTable}_versions\".Version";
$query->renameTable($table, $table . '_versions');
}
$query->select[] = "\"{$baseTable}_versions\".AuthorID, \"{$baseTable}_versions\".Version, \"{$baseTable}_versions\".RecordID AS ID";
return $query;
}
/**
* Return the latest version of the given page.
*
* @return DataObject
*/
static function get_latest_version($class, $id) {
$oldStage = Versioned::$reading_stage;
Versioned::$reading_stage = null;
$baseTable = ClassInfo::baseDataClass($class);
$query = singleton($class)->buildVersionSQL("\"{$baseTable}\".RecordID = $id", "\"{$baseTable}\".Version DESC");
$query->limit = 1;
$record = $query->execute()->record();
$className = $record['ClassName'];
if(!$className) {
Debug::show($query->sql());
Debug::show($record);
user_error("Versioned::get_version: Couldn't get $class.$id, version $version", E_USER_ERROR);
}
Versioned::$reading_stage = $oldStage;
return new $className($record);
}
/**
* @return DataObject
*/
static function get_version($class, $id, $version) {
$oldStage = Versioned::$reading_stage;
Versioned::$reading_stage = null;
$baseTable = ClassInfo::baseDataClass($class);
$query = singleton($class)->buildVersionSQL("\"{$baseTable}\".RecordID = $id AND \"{$baseTable}\".Version = $version");
$record = $query->execute()->record();
$className = $record['ClassName'];
if(!$className) {
Debug::show($query->sql());
Debug::show($record);
user_error("Versioned::get_version: Couldn't get $class.$id, version $version", E_USER_ERROR);
}
Versioned::$reading_stage = $oldStage;
return new $className($record);
}
/**
* @return DataObject
*/
static function get_all_versions($class, $id, $version) {
$baseTable = ClassInfo::baseDataClass($class);
$query = singleton($class)->buildVersionSQL("\"{$baseTable}\".RecordID = $id AND \"{$baseTable}\".Version = $version");
$record = $query->execute()->record();
$className = $record[ClassName];
if(!$className) {
Debug::show($query->sql());
Debug::show($record);
user_error("Versioned::get_version: Couldn't get $class.$id, version $version", E_USER_ERROR);
}
return new $className($record);
}
function contentcontrollerInit($controller) {
self::choose_site_stage();
}
function modelascontrollerInit($controller) {
self::choose_site_stage();
}
protected static $reading_stage = null;
protected static $reading_archived_date = null;
function updateFieldLabels(&$labels) {
$labels['Versions'] = _t('Versioned.has_many_Versions', 'Versions', PR_MEDIUM, 'Past Versions of this page');
}
function flushCache() {
self::$cache_versionnumber = array();
}
}
/**
* Represents a single version of a record.
* @package sapphire
* @subpackage model
* @see Versioned
*/
class Versioned_Version extends ViewableData {
protected $record;
protected $object;
function __construct($record) {
$this->record = $record;
$record['ID'] = $record['RecordID'];
$className = $record['ClassName'];
$this->object = new $className($record);
$this->failover = $this->object;
parent::__construct();
}
function PublishedClass() {
return $this->record['WasPublished'] ? 'published' : 'internal';
}
function Author() {
return DataObject::get_by_id("Member", $this->record['AuthorID']);
}
function Publisher() {
if( !$this->record['WasPublished'] )
return null;
return DataObject::get_by_id("Member", $this->record['PublisherID']);
}
function Published() {
return !empty( $this->record['WasPublished'] );
}
}
?>
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