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FIXED: Issue where temporary table would cause unpredictable behaviour. Temporary table functionality was substituted with subqueries in each use case.

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ADDED: Test case for version archive functionality.
This commit is contained in:
Damian Mooyman 2012-08-20 13:24:28 +12:00
parent c55b018feb
commit 0f09305e3d
2 changed files with 77 additions and 35 deletions
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59
model/Versioned.php
View File

@ -160,10 +160,19 @@ class Versioned extends DataExtension {
}
// Link to the version archived on that date
$archiveTable = $this->requireArchiveTempTable($baseTable, $date);
$query->addFrom(array($archiveTable => "INNER JOIN \"$archiveTable\"
ON \"$archiveTable\".\"ID\" = \"{$baseTable}_versions\".\"RecordID\"
AND \"$archiveTable\".\"Version\" = \"{$baseTable}_versions\".\"Version\""));
$safeDate = Convert::raw2sql($date);
$query->addWhere(
"`{$baseTable}_versions`.`Version` IN
(SELECT LatestVersion FROM
(SELECT
`{$baseTable}_versions`.`RecordID`,
MAX(`{$baseTable}_versions`.`Version`) AS LatestVersion
FROM `{$baseTable}_versions`
WHERE `{$baseTable}_versions`.`LastEdited` <= '$safeDate'
GROUP BY `{$baseTable}_versions`.`RecordID`
) AS `{$baseTable}_versions_latest`
WHERE `{$baseTable}_versions_latest`.`RecordID` = `{$baseTable}_versions`.`RecordID`
)");
break;
// Reading a specific stage (Stage or Live)
@ -204,10 +213,18 @@ class Versioned extends DataExtension {
// Return latest version instances, regardless of whether they are on a particular stage
// This provides "show all, including deleted" functonality
if($dataQuery->getQueryParam('Versioned.mode') == 'latest_versions') {
$archiveTable = self::requireArchiveTempTable($baseTable);
$query->addInnerJoin($archiveTable, "\"$archiveTable\".\"ID\" = \"{$baseTable}_versions\".\"RecordID\" AND \"$archiveTable\".\"Version\" = \"{$baseTable}_versions\".\"Version\"");
$query->addWhere(
"`{$alias}_versions`.`Version` IN
(SELECT LatestVersion FROM
(SELECT
`{$alias}_versions`.`RecordID`,
MAX(`{$alias}_versions`.`Version`) AS LatestVersion
FROM `{$alias}_versions`
GROUP BY `{$alias}_versions`.`RecordID`
) AS `{$alias}_versions_latest`
WHERE `{$alias}_versions_latest`.`RecordID` = `{$alias}_versions`.`RecordID`
)");
}
break;
default:
throw new InvalidArgumentException("Bad value for query parameter Versioned.mode: " . $dataQuery->getQueryParam('Versioned.mode'));
@ -235,34 +252,6 @@ class Versioned extends DataExtension {
self::$archive_tables = 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 $date The date. If omitted, then the latest version of each page will be returned.
* @todo Ensure that this is DB abstracted
*/
protected static function requireArchiveTempTable($baseTable, $date = null) {
if(!isset(self::$archive_tables[$baseTable])) {
self::$archive_tables[$baseTable] = DB::createTable("_Archive$baseTable", array(
"ID" => "INT NOT NULL",
"Version" => "INT NOT NULL",
), null, array('temporary' => true));
}
if(!DB::query("SELECT COUNT(*) FROM \"" . self::$archive_tables[$baseTable] . "\"")->value()) {
if($date) $dateClause = "WHERE \"LastEdited\" <= '$date'";
else $dateClause = "";
DB::query("INSERT INTO \"" . self::$archive_tables[$baseTable] . "\"
SELECT \"RecordID\", max(\"Version\") FROM \"{$baseTable}_versions\"
$dateClause
GROUP BY \"RecordID\"");
}
return self::$archive_tables[$baseTable];
}
/**
* 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 '_'.

53
tests/model/VersionedTest.php
View File

@ -266,6 +266,59 @@ class VersionedTest extends SapphireTest {
$this->assertInstanceOf("VersionedTest_DataObject", $obj3);
}
public function testArchiveVersion() {
// In 2005 this file was created
SS_Datetime::set_mock_now('2005-01-01 00:00:00');
$testPage = new VersionedTest_Subclass();
$testPage->Title = 'Archived page';
$testPage->Content = 'This is the content from 2005';
$testPage->ExtraField = '2005';
$testPage->write();
$testPage->publish('Stage', 'Live');
// In 2007 we updated it
SS_Datetime::set_mock_now('2007-01-01 00:00:00');
$testPage->Content = "It's 2007 already!";
$testPage->ExtraField = '2007';
$testPage->write();
$testPage->publish('Stage', 'Live');
// In 2009 we updated it again
SS_Datetime::set_mock_now('2009-01-01 00:00:00');
$testPage->Content = "I'm enjoying 2009";
$testPage->ExtraField = '2009';
$testPage->write();
$testPage->publish('Stage', 'Live');
// End mock, back to the present day:)
SS_Datetime::clear_mock_now();
// Test 1 - 2006 Content
singleton('VersionedTest_Subclass')->flushCache(true);
Versioned::set_reading_mode('Archive.2006-01-01 00:00:00');
$testPage2006 = DataObject::get('VersionedTest_Subclass')->filter(array('Title' => 'Archived page'))->first();
$this->assertInstanceOf("VersionedTest_Subclass", $testPage2006);
$this->assertEquals("2005", $testPage2006->ExtraField);
$this->assertEquals("This is the content from 2005", $testPage2006->Content);
// Test 2 - 2008 Content
singleton('VersionedTest_Subclass')->flushCache(true);
Versioned::set_reading_mode('Archive.2008-01-01 00:00:00');
$testPage2008 = DataObject::get('VersionedTest_Subclass')->filter(array('Title' => 'Archived page'))->first();
$this->assertInstanceOf("VersionedTest_Subclass", $testPage2008);
$this->assertEquals("2007", $testPage2008->ExtraField);
$this->assertEquals("It's 2007 already!", $testPage2008->Content);
// Test 3 - Today
singleton('VersionedTest_Subclass')->flushCache(true);
Versioned::set_reading_mode('Stage.Stage');
$testPageCurrent = DataObject::get('VersionedTest_Subclass')->filter(array('Title' => 'Archived page'))->first();
$this->assertInstanceOf("VersionedTest_Subclass", $testPageCurrent);
$this->assertEquals("2009", $testPageCurrent->ExtraField);
$this->assertEquals("I'm enjoying 2009", $testPageCurrent->Content);
}
}
class VersionedTest_DataObject extends DataObject implements TestOnly {