Update Item.php

backend/app/Item.php

@@ -24,6 +24,15 @@
       'updated_at',
     ];
 
+    /**
+     * The attributes that should be cast.
+     *
+     * @var array
+     */
+    protected $casts = [
+      'watchlist' => 'boolean',
+    ];
+    
     /**
      * The accessors to append to the model's array form.
      *