fix billing

order-events/app/events/billing/append_enrollment.py

@@ -59,7 +59,7 @@ def lambda_handler(event: EventBridgeEvent, context: LambdaContext) -> bool:
     if old_course:
         enrollment['course'] = old_course
 
-    created_at: datetime = fromisoformat(enrollment['create_date'])  # type: ignore
+    created_at: datetime = fromisoformat(enrollment['created_at'])  # type: ignore
     start_date, end_date = get_billing_period(
         billing_day=new_image['billing_day'],
         date_=created_at,
@@ -122,9 +122,7 @@ def lambda_handler(event: EventBridgeEvent, context: LambdaContext) -> bool:
                     'user': pick(('id', 'name'), enrollment['user']),
                     'course': pick(('id', 'name'), enrollment['course']),
                     'unit_price': course['unit_price'],
-                    # Post-migration: uncomment the following line
-                    # 'enrolled_at': enrollment['created_at'],
-                    'enrolled_at': enrollment['create_date'],
+                    'enrolled_at': enrollment['created_at'],
                     'created_at': now_,
                 }
                 # Add author if present

order-events/app/events/billing/cancel_enrollment.py

@@ -33,7 +33,7 @@ def lambda_handler(event: EventBridgeEvent, context: LambdaContext) -> bool:
         + SortKey('canceled', path_spec='author', rename_key='canceled_by')
     )
 
-    created_at: datetime = fromisoformat(new_image['create_date'])  # type: ignore
+    created_at: datetime = fromisoformat(new_image['created_at'])  # type: ignore
     start_date, end_date = get_billing_period(
         billing_day=int(subscription['billing_day']),
         date_=created_at,