fix backward compatibility by making PayuProvider's get_refund_descri…

…ption argument optional

AUTHORS.rst

@@ -10,4 +10,4 @@ Development Lead
 Contributors
 ------------
 
-* Radek Holý
+* BlenderKit <[email protected]>

HISTORY.rst

@@ -3,15 +3,23 @@
 History
 -------
 
+Unreleased
+**********
+* fix backward compatibility by making PayuProvider's get_refund_description argument optional
+* make PayuProvider.refund fail if get_refund_description is not provided
+* deprecate the default value of get_refund_description; set it to a callable instead
+
 1.3.1 (2024-03-19)
 ******************
 * Fix description on PyPI
 
 1.3.0 (2024-03-19)
 ******************
+* add get_refund_description and get_refund_ext_id arguments to PayuProvider
 * add PayuProvider.refund
 * update payment.captured_amount only when order is completed
 * subtract refunds from payment.captured_amount rather than from payment.total
+* rename PayuProvider.payu_api_order_url to payu_api_orders_url
 * tests for Django 2.2-5.0 Python 3.7-3.12
 
 1.2.4 (2022-03-17)

README.rst

@@ -58,7 +58,7 @@ Here are valid parameters for the provider:
    :express_payments:       use PayU express form
    :widget_branding:        tell express form to show PayU branding
    :store_card:             (default: False) whether PayU should store the card
-   :get_refund_description: A mandatory callable that is called with two keyword arguments `payment` and `amount` in order to get the string description of the particular refund whenever ``provider.refund(payment, amount)`` is called.
+   :get_refund_description: An optional callable that is called with two keyword arguments `payment` and `amount` in order to get the string description of the particular refund whenever ``provider.refund(payment, amount)`` is called. The callable is optional because of backwards compatibility. However, if it is not set, an attempt to refund raises an exception. A default value of `get_refund_description` is deprecated.
    :get_refund_ext_id:      An optional callable that is called with two keyword arguments `payment` and `amount` in order to get the External string refund ID of the particular refund whenever ``provider.refund(payment, amount)`` is called. If ``None`` is returned, no External refund ID is set. An External refund ID is not necessary if partial refunds won't be performed more than once per second. Otherwise, a unique ID is recommended since `PayuProvider.refund` is idempotent and if exactly same data will be provided, it will return the result of the already previously performed refund instead of performing a new refund. Defaults to a random UUID version 4 in the standard form.
 
 

payments_payu/provider.py

@@ -2,6 +2,7 @@
 import json
 import logging
 import uuid
+import warnings
 from decimal import ROUND_HALF_UP, Decimal
 from urllib.parse import urljoin
 
@@ -185,7 +186,16 @@ def __init__(self, *args, **kwargs):
         self.payu_shop_name = kwargs.pop("shop_name", "")
         self.grant_type = kwargs.pop("grant_type", "client_credentials")
         self.recurring_payments = kwargs.pop("recurring_payments", False)
-        self.get_refund_description = kwargs.pop("get_refund_description")
+        self.get_refund_description = kwargs.pop(
+            "get_refund_description",
+            # TODO: The default is deprecated. Remove in the next major release.
+            None,
+        )
+        if self.get_refund_description is None:
+            warnings.warn(
+                "A default value of get_refund_description is deprecated. Set it to a callable instead.",
+                DeprecationWarning,
+            )
         self.get_refund_ext_id = kwargs.pop(
             "get_refund_ext_id", lambda payment, amount: str(uuid.uuid4())
         )
@@ -604,6 +614,9 @@ def process_data(self, payment, request, *args, **kwargs):
             )
 
     def refund(self, payment, amount=None):
+        if self.get_refund_description is None:
+            raise ValueError("get_refund_description not set")
+
         request_url = self._get_payu_api_order_url(payment.transaction_id) + "/refunds"
 
         request_data = {