Fix cloning the BelongsTo relationship.

Closes #45.

src/Cloner.php

@@ -49,7 +49,9 @@ public function duplicate($model, $relation = null) {
 		$this->dispatchOnCloningEvent($clone, $relation, $model);
 
 		if ($relation) {
-			$relation->save($clone);
+            if (!is_a($relation, 'Illuminate\Database\Eloquent\Relations\BelongsTo')) {
+                $relation->save($clone);
+            }
 		} else {
 			$clone->save();
 		}
@@ -210,7 +212,11 @@ protected function duplicatePivotedRelation($relation, $relation_name, $clone) {
 	 */
 	protected function duplicateDirectRelation($relation, $relation_name, $clone) {
 		$relation->get()->each(function($foreign) use ($clone, $relation_name) {
-			$this->duplicate($foreign, $clone->$relation_name());
-		});
+			$cloned_relation = $this->duplicate($foreign, $clone->$relation_name());
+            if (is_a($clone->$relation_name(), 'Illuminate\Database\Eloquent\Relations\BelongsTo')) {
+                $clone->$relation_name()->associate($cloned_relation);
+                $clone->save();
+            }
+        });
 	}
 }

stubs/Image.php

@@ -0,0 +1,15 @@
+<?php namespace Bkwld\Cloner\Stubs;
+
+use Bkwld\Cloner\Cloneable as Cloneable;
+
+class Image extends Photo {
+	use Cloneable;
+
+    public $cloneable_relations = ['article'];
+
+	protected $table = 'photos';
+
+    public function onCloning() {
+        $this->uid = 2;
+    }
+}

tests/FunctionalTest.php

@@ -5,6 +5,7 @@
 use Bkwld\Cloner\Adapters\Upchuck;
 use Bkwld\Cloner\Stubs\Article;
 use Bkwld\Cloner\Stubs\Author;
+use Bkwld\Cloner\Stubs\Image;
 use Bkwld\Cloner\Stubs\Photo;
 use Bkwld\Cloner\Stubs\User;
 use Bkwld\Upchuck\Helpers;
@@ -212,7 +213,13 @@ function testExists()
 		$path = $this->helpers->path($photo->image);
 		$this->assertTrue($this->disk->has($path));
 		$this->assertEquals('contents', $this->disk->read($path));
-	}
+
+		// Test one to many inverse (BelongsTo)
+        $image = Image::first();
+        $clone = $cloner->duplicate($image);
+        $this->assertNotNull($clone->article);
+        $this->assertNotEquals($this->article->id, $clone->article->id);
+    }
 
 	// Test that model is created in a differetnt database.  These checks don't
 	// use eloquent because Laravel has issues with relationships on models in