Version 4.1.2

system/Patterns/ActiveRecord.php

@@ -334,11 +334,26 @@ abstract class _ActiveRecord
 		}
 		else
 		{
+			if ( !array_key_exists( $key, $this->_data ) or $this->_data[ $key ] != $value )
+			{
+				$this->changed[ $key ] = $value;
+			}
+			
 			$this->_data[ $key ] = $value;
-			$this->changed[ $key ] = $value;
 		}
 	}
 	
+	/**
+	 * Is value in data store?
+	 *
+	 * @param	mixed	$key	Key
+	 * @return	bool
+	 */
+	public function __isset( $key )
+	{
+		return isset( $this->_data[ $key ] );
+	}
+	
 	/**
 	 * @brief	By default cloning will create a new ActiveRecord record, but if you truly want an object copy you can set this to TRUE first and a direct copy will be returned
 	 */
@@ -380,12 +395,15 @@ abstract class _ActiveRecord
 		}
 		
 		foreach ( array_keys( static::$bitOptions ) as $k )
-		{
+		{			
 			if ( $this->$k instanceof Bitwise )
 			{
 				foreach( $this->$k->values as $field => $value )
-				{
-					$data[ $field ] = intval( $value );
+				{ 
+					if ( isset( $data[ $field ] ) or $this->$k->originalValues[ $field ] != intval( $value ) )
+					{
+						$data[ $field ] = intval( $value );
+					}
 				}
 			}
 		}