From d9e02a5d0c1a81925df33a9b25501fc90db91451 Mon Sep 17 00:00:00 2001
From: Bharat Mediratta <bharat@menalto.com>
Date: Tue, 16 Dec 2008 04:29:00 +0000
Subject: Various optimizations: o Add model_cache::get() which caches models
 avoiding duplicate lookups o Stop using ORM relationships for
 Item_Model::owner so that we can use caching o For Item_Model::xxx_edit
 fields, don't make them editable for guests o Other minor stuff.

These optimizations reduce the number of queries for a 9-photos page from ~200
to ~45.  Still way too many!
---
 core/helpers/model_cache.php | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 core/helpers/model_cache.php

(limited to 'core/helpers/model_cache.php')

diff --git a/core/helpers/model_cache.php b/core/helpers/model_cache.php
new file mode 100644
index 00000000..7a01393b
--- /dev/null
+++ b/core/helpers/model_cache.php
@@ -0,0 +1,35 @@
+<?php defined("SYSPATH") or die("No direct script access.");
+/**
+ * Gallery - a web based photo album viewer and editor
+ * Copyright (C) 2000-2008 Bharat Mediratta
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+class model_cache_Core {
+  private static $cache;
+
+  function get($model_name,  $id, $field_name="id") {
+    if (TEST_MODE || empty(self::$cache->$model_name->$field_name->$id)) {
+      $model = ORM::factory($model_name)->where($field_name, $id)->find();
+      if (!$model->loaded) {
+        throw new Exception("@todo MISSING_MODEL $model_name:$id");
+      }
+      self::$cache->$model_name->$field_name->$id = $model;
+    }
+
+
+    return self::$cache->$model_name->$field_name->$id;
+  }
+}
-- 
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