[FIX] case when taxes_id is not set

beesdoo_product/models/beesdoo_product.py

@@ -94,7 +94,12 @@ class BeesdooProduct(models.Model):
                                        raise_if_not_found=False)
 
         taxes_included = set(self.taxes_id.mapped('price_include'))
-        if len(taxes_included) > 1:
+        if len(taxes_included) == 0 or not self.weight:
+            self.total_with_vat = self.list_price
+            self.total_with_vat_by_unit = self.total_with_vat / self.weight
+            return True
+
+        elif len(taxes_included) > 1:
             raise ValidationError('Several tax strategies defined for %s' % self.name)
 
         if taxes_included.pop():