Output rake task results

app/models/concerns/domain/discardable.rb

@@ -9,7 +9,10 @@ module Concerns::Domain::Discardable
                       DomainStatus::SERVER_DELETE_PROHIBITED,
                       DomainStatus::DELETE_CANDIDATE)
 
-      domains.map(&:discard)
+      domains.each do |domain|
+        domain.discard
+        yield domain if block_given?
+      end
     end
   end
 

lib/tasks/domain.rake

@@ -1,6 +1,8 @@
 namespace :domain do
   desc 'Discard domains'
   task discard: :environment do
-    Domain.discard_domains
+    Domain.discard_domains do |domain|
+      puts "#{domain} is discarded"
+    end
   end
-end
+end