relation updates

app/Models/CarShowCategory.php

@@ -29,6 +29,6 @@ class CarShowCategory extends Model
   }
   public function showWinner()
   {
-      return $this->hasMany('App\Models\CarShowWinner', 'id', 'category');
+      return $this->hasMany(CarShowWinner::class, 'category');
   }
 }