Heroku Scheduler rake task aborts - ruby-on-rails-3

Question

I'm pretty new to Rails and for the first time, I want to use Heroku Scheduler to run periodical tasks in my rails application. As advised in the Tutorial, I created the following rake tasks in /lib/tasks/scheduler.rake
desc "This task is called by the Heroku scheduler add-on"
task :auto_results => :environment do
puts "Updating results..."
#cups = Cup.all
#cups.each do |cup|
cup.fix_current_results
end
puts "done."
end
task :update_game_dates => :environment do
puts "Updating game dates..."
#cups = Cup.all
#cups.each do |cup|
cup.update_game_dates
end
puts "done."
end
The task run fine in my local environment, but after pushin to Heroku and running the task, each abort with the following error:
rake aborted!
undefined method `name' for nil:NilClass
To me it seems that Heroku somehow can't access the database and so doesn't revieve an object on which it can perform methods.
Ideas anyone?

Answer 1

You could do the following:
Use a class method in your Cup model. You can then call it using the rails runner Cup.my_class_methodcommand, and schedule this in the Heroku scheduler.
# app/models/cup.rb
class Cup < ActiveRecord::Base
# Your existing code
##
# Class Methods
# that can be run by 'rails runner Cup.my_class_method'
# with the Heroku scheduler
def self.auto_results
find_each {|cup| cup.fix_current_results}
end
def self.update_game_dates
find_each {|cup| cup.update_game_dates}
end
end
Then schedule rails runner Cup.auto_resultsand rails runner Cup.update_game_dateswith the Heroku scheduler.
I've optimizied your code a litte in the process, ask away if you have any questions.