[FIX] delivery_price_product_domain: fix bug when rules is not set

Author: dessanhemrayev

delivery_price_product_domain/models/delivery_carrier.py

@@ -3,7 +3,8 @@
 
 import ast
 
-from odoo import fields, models
+from odoo import _, fields, models
+from odoo.exceptions import UserError
 from odoo.tools.safe_eval import safe_eval
 
 
@@ -52,12 +53,13 @@ def recompute_price_available(self, apply_product, price_dict, untaxed_in_dict):
 
     def _get_price_from_picking(self, total, weight, volume, quantity):
         "Find price rule matching SO base on apply_product_domain"
-        if (self.free_over and total >= self.amount) or not self.price_rule_ids:
+        if self.free_over and total >= self.amount:
             return 0.0
         price_dict = self._get_price_dict(total, weight, volume, quantity)
         untaxed_in_dict = "untaxed_price" in price_dict
         test = False
-
+        if not self.price_rule_ids:
+            raise UserError(_("No price rule defined for this carrier!"))
         rule_line = self.price_rule_ids[0]
         for line in self.price_rule_ids:
             apply_product_domain_char = line.apply_product_domain