codigo actual del servidor, con avances de joan

app/Models/Cart.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace App\Models;
+
+use App\Models\User;
+use App\Models\Address;
+use Illuminate\Database\Eloquent\Model;
+
+class Cart extends Model
+{
+    protected $guarded = [];
+    protected $fillable = ['address_id','price','tax','shipping_cost','discount','product_referral_code','coupon_code','coupon_applied','quantity','user_id','temp_user_id','owner_id','product_id','variation'];
+
+    public function user()
+    {
+        return $this->belongsTo(User::class);
+    }
+
+    public function product()
+    {
+        return $this->belongsTo(Product::class);
+    }
+
+    public function address()
+    {
+        return $this->belongsTo(Address::class);
+    }
+}