Merge pull request #1921 from denis-gorin/issue-1920-fix-page-by-slug

fix displaying page (singleton) by slug

src/Repository/ContentRepository.php

@@ -128,8 +128,12 @@ public function findOneById(int $id): ?Content
         return $this->find($id);
     }
 
-    public function findOneBySlug(string $slug, ?ContentType $contentType = null): ?Content
+    /*
+    * @param string|int $slug
+    */
+    public function findOneBySlug($slug, ?ContentType $contentType = null): ?Content
     {
+        $slug = (string) $slug;
         $qb = $this->getQueryBuilder();
         $connection = $qb->getEntityManager()->getConnection();