- Bugfixes done linked to SearchRequest and Searchable features.

- Fixed a bug introduced into PdoObject exception on latest commit.
- Corrected the open() close() enclosure of query condition.

src/Annotation/Property/Relation.php

@@ -28,7 +28,11 @@ class Relation implements \Ulmus\Annotation\Annotation {
     }
     
     public function entity() {
-        $e = $this->entity;
+        try {
+            $e = $this->entity;        
+        } catch (\Throwable $ex) {
+            throw new \Exception("Your @Relation annotation seems to be missing an `entity` entry.");
+        }
         
         return new $e();
     }