128 lines
3.9 KiB
PHP
128 lines
3.9 KiB
PHP
<?php defined('SYSPATH') or die('No direct access allowed.');
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/**
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* This class extends Kohana's [ORM] class to create defaults for TSM.
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*
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* @package PTA
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* @subpackage Core
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* @category ORM
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* @author Deon George
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* @copyright (c) 2010 phpTSMadmin Development Team
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* @license http://dev.osbill.net/license.html
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*/
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class ORMTSM extends ORM {
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// Suppress ORMs inclusion of <table_name>.*
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protected $_disable_wild_select = TRUE;
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// Suppress ORMs inclusion of <table_name>. to column joins
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protected $_disable_join_table_name = TRUE;
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// Suppress ORMs use of limit
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protected $_disable_limit = TRUE;
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// To enable effective caching, this must disabled.
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protected $_reload_on_wakeup = FALSE;
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// Enable the formating of columns
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protected $_object_formated = array();
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protected $_formated = FALSE;
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protected $_formats = array();
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public function find() {
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// Check if we can preload our data and havent already done it
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if ($time = $this->isCacheable() AND is_null(Cache::instance()->get($cache_key = 'PRELOAD:'.$this->_table_name))) {
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// Firstly set our cache, so that we dont get in a loop
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Cache::instance()->set($cache_key,TRUE,$time-1);
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// Find all records of this type
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$c = get_class($this);
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$x = new $c;
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foreach ($x->find_all() as $record) {
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// Simulate loading the record so that we can get the SQL to use as our cache key
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$y = new $c;
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$y->where($y->_primary_key,'=',(string)$record);
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// Code, as extracted from ORM to complete building the SQL
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$y->_build(Database::SELECT);
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$y->_db_builder->from($y->_table_name);
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if (! isset($y->_db_applied['order_by']) AND ! empty($y->_sorting))
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foreach ($y->_sorting as $column => $direction) {
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if (strpos($column, '.') === FALSE)
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// Sorting column for use in JOINs
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$column = ($y->_disable_join_table_name ? '' : $y->_table_name.'.').$column;
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$y->_db_builder->order_by($column, $direction);
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}
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// Set the cache key based on the database instance name and SQL
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$cache_key = 'Database::query("'.$y->_db.'", "'.(string)$y->_db_builder.'")';
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unset($y);
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// Cache the record, our subsequent find should get a cache hit now.
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Kohana::cache($cache_key, array($record->as_array()), $time);
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}
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unset($x);
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}
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// Contiue as normal
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return parent::find();
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}
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private function isCacheable() {
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$preload = array('NODES','VOLUMES');
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$config = Kohana::config('database')->{Database::$default};
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if ($config['caching'] AND isset($config['cachepreload'][$this->_table_name]) AND count($this->_db_pending) == 1 AND $this->_db_pending[0]['name'] == 'where' AND $this->_db_pending[0]['args'][0] == $this->_primary_key AND $this->_db_pending[0]['args'][1] == '=')
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return $config['cachepreload'][$this->_table_name];
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else
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return FALSE;
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}
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protected function _load_result($multiple = FALSE) {
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// We'll cache our query results
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if ($c = $this->_db->caching($this->_table_name))
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$this->_db_builder->cached($c);
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return parent::_load_result($multiple);
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}
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/**
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* Proxy method to Database list_columns.
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* This enables caching of the list_columns queries. Since this doesnt
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* we hard code the cache to 7 days.
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*
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* @return array
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*/
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public function list_columns() {
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// We'll cache our query results
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if ($this->_db->caching('SCHEMA')) {
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// Set the cache key based on the database instance name and SQL
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$cache_key = 'Database::query(LC:'.$this->_table_name.')';
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if (! is_null($result = Cache::instance()->get($cache_key)))
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// Return a cached result
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return $result;
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}
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// Proxy to database
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$result = $this->_db->list_columns($this->_table_name);
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// Cache the result array
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if (isset($cache_key))
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Cache::instance()->set($cache_key, $result, 604800);
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return $result;
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}
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// Load our values into the ORM object
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public function load_object(array $values) {
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return parent::_load_values($values);
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}
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public static function date($date,$format) {
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return $date ? date($format,strtotime($date)) : '';
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}
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}
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?>
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