codigo actual del servidor, con avances de joan

app/Models/Review.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class Review extends Model
+{
+  public function user(){
+    return $this->belongsTo(User::class);
+  }
+
+  public function product(){
+    return $this->belongsTo(Product::class);
+  }
+}