fix for 1:0 reverse relation when getting detail

Author: cblanquera

src/Schema.php

@@ -136,7 +136,7 @@ public function getReverseRelations(?int $many = null): array
         || !trim($reversed[0]->get('table'))
         || !trim($reversed[0]->get('primary1'))
         || !trim($reversed[0]->get('primary2'))
-        || !trim($reversed[0]->get('many'))
+        || !is_numeric($reversed[0]->get('many'))
         //dont do post_post
         || $relation->getName() === $table
       ) {