Add enabled to event_schedules

To show scheduled events that have been cancelled/withdrawn as 'cancelled', and consequently also show when an event is their replacement.

admin/schedules#show does not show events that were scheduled and then cancelled/withdrawn, however a record in event_schedules exists for those events, but event_schedule.enabled = false

app/models/event.rb

@@ -197,6 +197,14 @@ class Event < ApplicationRecord
           send(transition)
         end
         save
+        # If the event was previously scheduled, and then withdrawn or cancelled
+        # its event_schedule will have enabled set to false
+        # If the event is now confirmed again, we want it to be available for scheduling
+        Rails.logger.debug "transition is #{transition}"
+        if transition == :confirm
+          Rails.logger.debug "schedules #{EventSchedule.unscoped.where(event: self, enabled: false)}"
+          EventSchedule.unscoped.where(event: self, enabled: false).destroy_all
+        end
       rescue Transitions::InvalidTransition => e
         alert = "Update state failed. #{e.message}"
       end

app/models/event_schedule.rb

@@ -1,4 +1,5 @@
 class EventSchedule < ApplicationRecord
+  default_scope { where(enabled: true) }
   belongs_to :schedule
   belongs_to :event
   belongs_to :room
@@ -33,7 +34,7 @@ class EventSchedule < ApplicationRecord
   # Returns event schedules that are scheduled in the same room and start_time as event
   #
   def intersecting_event_schedules
-    room.event_schedules.where(start_time: start_time, schedule: schedule).where.not(id: id)
+    EventSchedule.unscoped.where(room: room, start_time: start_time, schedule: schedule).where.not(id: id)
   end
 
   def replacement?