Imrpoving Item, Product and Users

app/Item.php

@@ -6,12 +6,18 @@ use Illuminate\Database\Eloquent\Model;
 
 class Item extends Model
 {
-    //
-    public function free($productID, $userID)
+    protected $fillable = ['product_id', 'name'];
+
+    public function product()
+    {
+        return $this->belongsTo(Product::class);
+    }
+
+    public function free($product_id, $user_id)
     {
         return $query->where([
-            ['userID', $userID],
-            ['productID', $productID],
+            ['user_id', $user_id],
+            ['product_id', $product_id],
             ['usedBy', ''],
         ]);
     }