diff --git a/nfu_ecommerce/controllers/main.py b/nfu_ecommerce/controllers/main.py
index 52dc815..bed77ec 100644
--- a/nfu_ecommerce/controllers/main.py
+++ b/nfu_ecommerce/controllers/main.py
@@ -48,6 +48,6 @@ class WebsiteSale(WebsiteSale):
             )
             post["open_product_ids"] = open_product_ids
         else:
-            post["open_product_ids"] = []
+            post["open_product_ids"] = None
         res = super().shop(page=0, category=None, search="", min_price=0.0, max_price=0.0, ppg=False, **post)
         return res
diff --git a/nfu_ecommerce/models/product_template.py b/nfu_ecommerce/models/product_template.py
index ab096e6..9ea29dc 100644
--- a/nfu_ecommerce/models/product_template.py
+++ b/nfu_ecommerce/models/product_template.py
@@ -16,6 +16,6 @@ class ProductTemplate(models.Model):
         search_details = super()._search_get_detail(website, order, options)
         open_product_ids = options.get("open_product_ids")
         domain = search_details["base_domain"]
-        if len(open_product_ids):
+        if open_product_ids is not None:
             domain.append([("id", "in", tuple(open_product_ids))])
         return search_details