adding a cart

app/Models/Cart.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Models;
+
+use Database\Factories\CartFactory;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\BelongsToMany;
+
+class Cart extends Model
+{
+    /** @use HasFactory<CartFactory> */
+    use HasFactory;
+
+    protected $fillable = ['user_id'];
+
+    public function user(): BelongsTo
+    {
+        return $this->belongsTo(User::class);
+    }
+
+    public function products(): BelongsToMany
+    {
+        return $this->belongsToMany(Product::class)->withPivot('quantity');
+    }
+}