code: def modify_event_view(request, id=None):
      
      event = get_object_or_404(Event, id=id)
      is_events_admin = request.user.has_admin_permission('events')
  
      if not is_events_admin:
          raise exceptions.PermissionDenied
  
      if request.method == "POST":
          if is_events_admin:
              form = AdminEventForm(data=request.POST, instance=event, all_groups=request.user.has_admin_permission('groups'))
          else:
              form = EventForm(data=request.POST, instance=event, all_groups=request.user.has_admin_permission('groups'))
          logger.debug(form)
          if form.is_valid():
              obj = form.save()
              # SAFE HTML
              obj.description = safe_html(obj.description)
              obj.save()
              messages.success(request, "Successfully modified event.")
              # return redirect("events")
          else:
              messages.error(request, "Error modifying event.")
      else:
          if is_events_admin:
              form = AdminEventForm(instance=event, all_groups=request.user.has_admin_permission('groups'))
          else:
              form = EventForm(instance=event, all_groups=request.user.has_admin_permission('groups'))
      context = {"form": form, "action": "modify", "action_title": "Modify", "id": id, "is_events_admin": is_events_admin}
      return render(request, "events/add_modify.html", context)
docs: Modify event page. You may only modify an event if you were the creator or you are an
      administrator.
  
      id: event id