Creating a set does not update affected records

[lnielsen]

Reproduce

1. Install Invenio v3.2 (https://inveniosoftware.org/products/framework/)
2. Login as an admin (i.e. create an account and assign admin role)
3. Create a new OAI set via the administration interface.

Problem

Creating the sets, starts a background task in celery which then seems to be rate limited. See error below.

[2020-02-17 10:41:54,759: INFO/MainProcess] Received task: invenio_oaiserver.tasks.update_affected_records[73318bac-d8a3-4501-a17b-d53652826b8b]
127.0.0.1 - - [17/Feb/2020 10:41:54] "POST /admin/oaiset/edit/?id=1&url=%2Fadmin%2Foaiset%2F HTTP/1.1" 302 -
[2020-02-17 10:41:55,065: ERROR/ForkPoolWorker-4] Task invenio_oaiserver.tasks.update_affected_records[73318bac-d8a3-4501-a17b-d53652826b8b] raised unexpected: TypeError('must be str, not NoneType',)
Traceback (most recent call last):
  File "/Users/lnielsen/envs/my-site-ZNC6mTtx/lib/python3.6/site-packages/celery/app/trace.py", line 382, in trace_task
    R = retval = fun(*args, **kwargs)
  File "/Users/lnielsen/envs/my-site-ZNC6mTtx/lib/python3.6/site-packages/flask_celeryext/app.py", line 100, in __call__
    self.app.flask_app.preprocess_request()
  File "/Users/lnielsen/envs/my-site-ZNC6mTtx/lib/python3.6/site-packages/flask/app.py", line 2241, in preprocess_request
    rv = func()
  File "/Users/lnielsen/envs/my-site-ZNC6mTtx/lib/python3.6/site-packages/flask_limiter/extension.py", line 511, in __check_request_limit
    six.reraise(*sys.exc_info())
  File "/Users/lnielsen/envs/my-site-ZNC6mTtx/lib/python3.6/site-packages/six.py", line 703, in reraise
    raise value
  File "/Users/lnielsen/envs/my-site-ZNC6mTtx/lib/python3.6/site-packages/flask_limiter/extension.py", line 494, in __check_request_limit
    self.__evaluate_limits(endpoint, all_limits)
  File "/Users/lnielsen/envs/my-site-ZNC6mTtx/lib/python3.6/site-packages/flask_limiter/extension.py", line 366, in __evaluate_limits
    limit_key = lim.key_func()
  File "/Users/lnielsen/envs/my-site-ZNC6mTtx/lib/python3.6/site-packages/invenio_app/limiter.py", line 19, in useragent_and_ip_limit_key
    return str(request.user_agent) + request.remote_addr
TypeError: must be str, not NoneType

[ppanero]

@lnielsen with the new dynamic sets, this can be closed right? i.e. does not apply