[FIX] delivery,website_sale: do not make api request on page rendering

Following a fix in 16.3 with 5052b9e4a15155c694cf005fdf330997770c6cac,
backported in 16.0+ with commit d28a8f67da06e58358b40636d1dca1f91a84e1ad,
the rates for the different carriers were computed on page loading,
to make sure unavailable carriers were hidden.

Nevertheless, this leads to significant increases of /shop/payment page
loading time depending on the enabled carriers.

This commit restricts the previous fix to the targeted type of carriers,
aka `base_on_rule` ones, whose rates do not depend on third party API
requests.

closes odoo/odoo#149657

X-original-commit: 99c8bda43f6f3bb027f8e03a753aaf2bb7ac585f
Signed-off-by: Victor Feyens (vfe) <vfe@odoo.com>

addons/delivery/models/delivery_carrier.py

@@ -128,6 +128,17 @@ class DeliveryCarrier(models.Model):
                 </p>'''),
         }
 
+    def _is_available_for_order(self, order):
+        self.ensure_one()
+        order.ensure_one()
+        if not self._match_address(order.partner_shipping_id):
+            return False
+
+        if self.delivery_type == 'base_on_rule':
+            return self.rate_shipment(order).get('success')
+
+        return True
+
     def available_carriers(self, partner):
         return self.filtered(lambda c: c._match_address(partner))
 

addons/website_sale/models/sale_order.py

@@ -628,16 +628,10 @@ class SaleOrder(models.Model):
         return bool(carrier)
 
     def _get_delivery_methods(self):
-        def _is_carrier_available(carrier):
-            # Drop carriers where price computation fails (no price rule available/matching request)
-            res = carrier.rate_shipment(self)
-            return res['success']
         # searching on website_published will also search for available website (_search method on computed field)
         return self.env['delivery.carrier'].sudo().search([
             ('website_published', '=', True),
-        ]).available_carriers(
-            self.partner_shipping_id
-        ).filtered(_is_carrier_available)
+        ]).filtered(lambda carrier: carrier._is_available_for_order(self))
 
     #=== TOOLING ===#