example_rake_task.rb

# frozen_string_literal: true

desc "example task"
task :example_task, [:for_real] => [:environment] do |task, args|
  ActiveRecord::Base.transaction do
    # This is the way, do your thing here
    unless args[:for_real] == "for_real"
      raise "Discarded all changes. To do a real run invoke this task as follows:
             bundle exec rake \"#{task.name}[for_real]\"\n"
    end
  end
end