feat: promote lately hosting locations by showing them first

Author: salzig

app/controllers/locations_controller.rb

@@ -2,7 +2,7 @@
 
 class LocationsController < ApplicationController
   expose(:location, find: ->(id, scope) { scope.from_slug(id) })
-  expose(:locations)  { Location.ordered }
+  expose(:locations)  { Location.ordered_by_last_occurrence }
   expose(:organizers) { User.organizers }
   expose(:stats)      { Event.stats }
 

app/models/location.rb

@@ -16,6 +16,7 @@ class Location < ApplicationRecord
   validates :url, length: { maximum: 255 }
 
   scope :ordered, -> { order('name ASC') }
+  scope :ordered_by_last_occurrence, -> { joins(:events).group(primary_key).order(Event.arel_table[:date].maximum.desc) }
   default_scope   -> { where(label: Whitelabel[:label_id]) }
 
   def geo_coder_address