When writing Rake tasks, to get access to all classes (such as the User model in this example) in your app’s environment, you need to depend on the :environment task shown as follows:
task :post_user => :environment do
end_time = Time.new
start_time = end_time - 60 #subtract 60 seconds
until start_time > end_time
start_time = start_time + 15 #increment 15 seconds
puts "Posting #{start_time}"
uesr = User.new(:user_id => 817, :timestamp => start_time)
user.save
end
end
