Show registration allowed in events api
Needed for ThaliApp#90.
registration_allowed field to the events API.
Also makes sure that the
registration_allowed field in the Events model and the
registered field in the
EventListSerializer can no longer be
Steps to use this feature
- Notice each event has a boolean field
registration_allowedthat indicates whether registrations for this event are open.
- Notice that the field
falseonly, and no longer