Access to interal collection object, fixes #19

README.md

@@ -237,6 +237,10 @@ You can also perform raw expressions on the internal MongoCollection object, not
         return $collection->find();
     });
 
+Or you can access the internal object directly:
+
+    User::raw()->find();
+
 **Query Caching**
 
 You may easily cache the results of a query using the remember method:

src/Jenssegers/Mongodb/Builder.php

@@ -410,12 +410,14 @@ class Builder extends \Illuminate\Database\Query\Builder {
      * @param  closure  $expression
      * @return mixed
      */
-    public function raw($expression)
+    public function raw($expression = null)
     {
         if ($expression instanceof Closure)
         {
             return call_user_func($expression, $this->collection);
         }
+
+        return $this->collection;
     }
 
     /**

tests/QueryTest.php

@@ -96,6 +96,9 @@ class QueryTest extends PHPUnit_Framework_TestCase {
 
 		$this->assertInstanceOf('MongoCursor', $cursor);
 		$this->assertEquals(1, $cursor->count());
+
+		$collection = DB::collection('users')->raw();
+		$this->assertInstanceOf('MongoCollection', $collection);
 	}
 
 }
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