Fix Rubocop issues

lib/tasks/db.rake

@@ -13,24 +13,24 @@ namespace :db do
     end
   end
 
-  desc "Import a given file into the database"
+  desc 'Import a given file into the database'
   task :import, [:path] => :environment do |_t, args|
     dump_path = args.path
     connection_config = ActiveRecord::Base.connection_config
 
     case connection_config[:adapter]
-    when "postgresql"
+    when 'postgresql'
       system("PGPASSWORD=#{connection_config[:password]} pg_restore " \
-        "--verbose --clean --no-acl --no-owner " \
+        '--verbose --clean --no-acl --no-owner ' \
         "--username=#{connection_config[:username]} " \
         "-d #{connection_config[:database]} #{dump_path}")
-    when "mysql", "mysql2"
+    when 'mysql', 'mysql2'
       system("mysql -u #{connection_config[:username]} " \
         "-p#{connection_config[:password]} " \
         "#{connection_config[:database]} < #{dump_path}")
     else
-      raise NotImplementedError, "An importer hasn't been implemented for: " \
-        "#{connection_config[:adapter]}"
+      raise NotImplementedError.new("An importer hasn't been implemented for: " \
+        "#{connection_config[:adapter]}")
     end
   end
 end

lib/tasks/registrations.rake

@@ -1,17 +1,17 @@
 # frozen_string_literal: true
 
 namespace :registrations do
-  desc "Create missing registrations for those how have a registration ticket."
-  task :create_missing, [:conference] => :environment do |t, args|
+  desc 'Create missing registrations for those how have a registration ticket.'
+  task :create_missing, [:conference] => :environment do |_t, args|
 
-    fail 'Please supply a conference short name.' unless args.conference
+    raise 'Please supply a conference short name.' unless args.conference
 
     conf = Conference.find_by(short_title: args.conference)
     # Check if a user is found based on the supplied email address
-    fail "Coud not find conference #{args.conference}" unless conf
+    raise "Coud not find conference #{args.conference}" unless conf
 
     purchases = conf.ticket_purchases.where(ticket: conf.registration_tickets, paid: true)
-    unregistered = purchases.select { |tp| !conf.user_registered?(tp.user) }
+    unregistered = purchases.reject { |tp| conf.user_registered?(tp.user) }
     puts "Found #{unregistered.count} unregistered users for #{purchases.count} ticket purchases."
     puts "There are currently #{conf.participants.count} registered users."
 
@@ -19,17 +19,17 @@ namespace :registrations do
       puts "Creating registration for #{tp.user.email}"
       Registration.create(user: tp.user, conference: conf)
     end
-    puts "Done."
+    puts 'Done.'
   end
 
-  desc "Show User emails who have not paid, but did register"
-  task :list_unpaid, [:conference] => :environment do |t, args|
+  desc 'Show User emails who have not paid, but did register'
+  task :list_unpaid, [:conference] => :environment do |_t, args|
 
-    fail 'Please supply a conference short name.' unless args.conference
+    raise 'Please supply a conference short name.' unless args.conference
 
     conf = Conference.find_by(short_title: args.conference)
     # Check if a user is found based on the supplied email address
-    fail "Coud not find conference #{args.conference}" unless conf
+    raise "Coud not find conference #{args.conference}" unless conf
 
     registered = conf.participants
     unpaid = registered.select do |user|
@@ -41,6 +41,6 @@ namespace :registrations do
     unpaid.each do |user|
       puts "'#{user.name}'<#{user.email}>, "
     end
-    puts ""
+    puts ''
   end
 end