Refactor community membership check in EventInvitation and add primary community accessor in PrimaryCommunity

Author: rsmithlal

app/models/better_together/event_invitation.rb

@@ -115,10 +115,9 @@ def invitee_uniqueness_for_event
     end
 
     def ensure_community_membership!(person)
-      return unless event&.creator&.community
+      community = BetterTogether::Community.find_by(host: true)
 
-      community = event.creator.community
-      return if community.person_community_memberships.exists?(member: person)
+      return unless community
 
       # Create community membership for the invitee
       default_role = BetterTogether::Role.find_by(identifier: 'community_member')

app/models/concerns/better_together/primary_community.rb

@@ -48,6 +48,11 @@ def primary_community_extra_attrs
       {}
     end
 
+    # Backwards-compatible accessor used in tests and callers expecting a `primary_community` method
+    def primary_community
+      community
+    end
+
     def after_record_created; end
 
     def to_s