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removed alternative_instance_get() (only used for gallery-hack)

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refactored query-caching in instance_get() to just cache the raw db fields (unlikely to change) - overzealous caching was causing problems with wrong SQL selects on subsequent calls

git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@50704 467b73ca-7a2a-4603-9d3b-597d59a354a9
This commit is contained in:
Ingo Schommer 2008-03-07 03:19:49 +00:00
parent 4dd4bc41a6
commit 844fe81cca
1 changed files with 27 additions and 13 deletions
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40
filesystem/File.php
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@ -52,6 +52,14 @@ class File extends DataObject {
static $belongs_many_many = array(
"BackLinkTracking" => "SiteTree",
);
/**
* Cached result of a "SHOW FIELDS" call
* in instance_get() for performance reasons.
*
* @var array
*/
protected static $cache_file_fields = null;
/**
@ -609,29 +617,29 @@ class File extends DataObject {
* @todo Admittedly this is a bit of a hack; but we need a way of ensuring that large
* TEXT fields don't stuff things up for the rest of us. Perhaps a separate search table would
* be a better way of approaching this?
* @deprecated alternative_instance_get()
*/
public function instance_get($filter = "", $sort = "", $join = "", $limit="", $containerClass = "DataObjectSet", $having="") {
if($this->hasMethod('alternative_instance_get')) return $this->alternative_instance_get($filter, $sort, $join, $limit, $containerClass, $having);
$query = $this->extendedSQL($filter, $sort, $limit, $join, $having);
$baseTable = reset($query->from);
$excludeDbColumns = array('Content');
// Work out which columns we're actually going to select
// In short, we select everything except File.Content
if(!self::$dataobject_select) {
self::$dataobject_select = array();
foreach($query->select as $item) {
if($item == "`File`.*") {
$fileColumns = DB::query("SHOW FIELDS IN `File`")->column();
$columnsToAdd = array_diff($fileColumns, array('Content'));
foreach($columnsToAdd as $otherItem) self::$dataobject_select[] = '`File`.' . $otherItem;
} else {
self::$dataobject_select[] = $item;
$filteredSelect = array();
foreach($query->select as $i => $item) {
if($item == "`File`.*") {
if(!isset(self::$cache_file_fields)) self::$cache_file_fields = DB::query("SHOW FIELDS IN `File`")->column();
$columnsToAdd = array_diff(self::$cache_file_fields, $excludeDbColumns);
foreach($columnsToAdd as $otherItem) {
$filteredSelect[] = '`File`.' . $otherItem;
}
} else {
$filteredSelect[] = $item;
}
}
$query->select = self::$dataobject_select;
$query->select = $filteredSelect;
$records = $query->execute();
$ret = $this->buildDataObjectSet($records, $containerClass);
@ -646,6 +654,12 @@ class File extends DataObject {
function userCanEdit() {
return false;
}
public function flushCache() {
parent::flushCache();
unset(self::$cache_file_fields);
}
}