Fixing bugs… adding better pivot support.

Signed-off-by: Taylor Otwell <taylorotwell@gmail.com>

laravel/database/eloquent/model.php

@@ -345,6 +345,18 @@ abstract class Model {
 		return new Query($this);
 	}
 
+	/**
+	 * Sync the original attributes with the current attributes.
+	 *
+	 * @return bool
+	 */
+	final public function sync()
+	{
+		$this->original = $this->attributes;
+
+		return true;
+	}
+
 	/**
 	 * Determine if a given attribute has changed from its original state.
 	 *
@@ -421,6 +433,18 @@ abstract class Model {
 		$this->attributes[$key] = $value;
 	}
 
+	/**
+	 * Remove an attribute from the model.
+	 *
+	 * @param  string  $key
+	 */
+	final public function purge($key)
+	{
+		unset($this->original[$key]);
+
+		unset($this->attributes[$key]);
+	}
+
 	/**
 	 * Handle the dynamic retrieval of attributes and associations.
 	 *