Add model's withCount columns ot exempt attributes

src/Cloneable.php

@@ -15,13 +15,20 @@ trait Cloneable {
 	 */
 	public function getCloneExemptAttributes() {
 
-		// Alwyas make the id and timestamps exempt
+		// Always make the id and timestamps exempt
 		$defaults = [
 			$this->getKeyName(),
 			$this->getCreatedAtColumn(),
 			$this->getUpdatedAtColumn(),
 		];
 
+		// Include the model count columns in the exempt columns
+		$count_columns = array_map(function($count_column) {
+		    return $count_column . '_count';
+        }, $this->withCount);
+
+		$defaults = array_merge($defaults, $count_columns);
+
 		// It none specified, just return the defaults, else, merge them
 		if (!isset($this->clone_exempt_attributes)) return $defaults;
 		return array_merge($defaults, $this->clone_exempt_attributes);

stubs/Article.php

@@ -6,6 +6,8 @@
 class Article extends Eloquent {
 	use Cloneable;
 
+	protected $withCount = ['photos'];
+
 	public $cloneable_relations = ['photos', 'authors', 'ratings'];
 
 	public function photos() {

tests/CloneableTest.php

@@ -53,4 +53,8 @@ public function testAddDuplicateRelation() {
 		$this->assertEquals(['photos', 'authors', 'ratings', 'test'], $article->getCloneableRelations());
 	}
 
+	public function testCountColumnsAreExempt() {
+	    $article = new Article;
+	    $this->assertContains('photos_count', $article->getCloneExemptAttributes());
+    }
 }