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authorChristophe.Boulain <>2009-06-15 07:49:42 +0000
committerChristophe.Boulain <>2009-06-15 07:49:42 +0000
commit3f0149b5b74d4017ba7f4ca28aa8a3e2053db964 (patch)
treec21232fbbd5218b826574458612557f59cf7e3c2 /framework/Db/schema/TDbExpression.php
parentcb0f97438fe634c5a95179d47c78af04fffa751b (diff)
Primilary import of new db stuff
Diffstat (limited to 'framework/Db/schema/TDbExpression.php')
-rwxr-xr-xframework/Db/schema/TDbExpression.php49
1 files changed, 49 insertions, 0 deletions
diff --git a/framework/Db/schema/TDbExpression.php b/framework/Db/schema/TDbExpression.php
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+<?php
+/**
+ * TDbExpression class file.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright &copy; 2008-2009 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+/**
+ * TDbExpression represents a DB expression that does not need escaping.
+ * TDbExpression is mainly used in {@link CActiveRecord} as attribute values.
+ * When inserting or updating a {@link CActiveRecord}, attribute values of
+ * type TDbExpression will be directly put into the corresponding SQL statement
+ * without escaping. A typical usage is that an attribute is set with 'NOW()'
+ * expression so that saving the record would fill the corresponding column
+ * with the current DB server timestamp.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @version $Id$
+ * @package system.db.schema
+ * @since 1.0.2
+ */
+class TDbExpression extends TComponent
+{
+ /**
+ * @var string the DB expression
+ */
+ public $expression;
+
+ /**
+ * Constructor.
+ * @param string the DB expression
+ */
+ public function __construct($expression)
+ {
+ $this->expression=$expression;
+ }
+
+ /**
+ * String magic method
+ * @return string the DB expression
+ */
+ public function __toString()
+ {
+ return $this->expression;
+ }
+} \ No newline at end of file