When user is user_id has exception.

[whyliu]

• edx-when version: 0.4
• Django version: 1.11
• Python version:2.7
• Operating System: ubuntu 16.04

Description

[Thu Feb 13 20:27:43.548798 2020] [:error] [pid 25110] File "/edx/apps/edx/venvs/edxapp/lib/python2.7/site-packages/edx_when/api.py", line 82, in get_dates_for_course
[Thu Feb 13 20:27:43.548802 2020] [:error] [pid 25110] user_id = user.id if not user.is_anonymous else ''
[Thu Feb 13 20:27:43.548805 2020] [:error] [pid 25110] AttributeError: 'long' object has no attribute 'is_anonymous'

What I Did

In api.py get_dates_for_course()
...
if isinstance(user, int):
...
In Python2.x, int and long is different type, change to
if not if hasattr(user,'is_anonymous'):