task :send_automate_alerts => :environment do
 # STDERR.puts "Path is #{$:}"
  Rake.application.rake_require '../../lib/models/alert_import'
  ai = AlertImport::Alert.new(2)
  ai.send_email_with_notifcations
end

在这段代码中我得到错误：

找不到../../lib/models/alert_import

在AlertImport我有：

module AlertImport

  class Alert

    def initialize(number_days)
      @number_days = number_days
    end

    def get_all_alerts
      alerts = { }
      Organization.automate_import.each do |o|
        last_import = o.import_histories.where(import_type: "automate").last
        last_successful_import = ImportHistory.last_automate_successful_import(o)
        if last_import
          if last_import.created_at + @number_days.days >= Time.now
            alerts[o.id] ="Error during last automate import Last successful import was #{ last_successful_import ? last_successful_import.created_at : "never"}" if last_import.status == "failure"
            alerts[o.id] ="Error during last automate import - status pending Last successful import was #{ last_successful_import ? last_successful_import.created_at : "never"}" if last_import.status == "pending"
          else
            alerts[o.id] = "There were no new files uploaded within #{@number_days} days"
          end
        else
          alerts[o.id] = "The import was never triggered at all"
        end
      end
      alerts
    end

    def send_email_with_notifcations
      alerts =get_all_alerts
      unless alerts.empty?
        AlertMailer.email_notifications(alerts).deliver
      end
    end

  end

end

正确的解决方案是：

desc "Send alerts about automate imports"

task :send_automate_alerts => :environment do
  require "#{Rails.root}/lib/models/alert_import"
  ai = AlertImport::Alert.new(2)
  ai.send_email_with_notifcations
end