frontend update

app/Invoice.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace App;
+
+use Illuminate\Database\Eloquent\Model;
+
+class Invoice extends Model
+{
+    protected $casts = [
+        'seller' => 'array',
+        'client' => 'array',
+        'bag'    => 'array',
+    ];
+
+    public function user() {
+        return $this->hasOne(User::class, 'id', 'user_id');
+    }
+}