Explicitly set platform as host only during the platform setup wizard steps

Automatically setting host before validation was causing the first community created during the db seed step to be set as the host. Geography records have primary communities and prior to them being added there were no seeded communities.

Author: rsmithlal

app/concerns/better_together/host.rb

@@ -6,8 +6,10 @@ module Host
     extend ActiveSupport::Concern
 
     included do
-      before_validation :set_as_host
+      # before_validation :set_as_host # this was causing problems wdhen the seeds created communities
       validate :single_host_record
+
+      scope :host, -> { where(host: true) }
     end
 
     def host?

app/controllers/better_together/setup_wizard_steps_controller.rb

@@ -27,6 +27,7 @@ def create_host_platform # rubocop:todo Metrics/AbcSize, Metrics/MethodLength
         ActiveRecord::Base.transaction do
           platform = base_platform
           platform.assign_attributes(platform_params)
+          platform.set_as_host
 
           if platform.save!
             mark_current_step_as_completed