ruby on rails - running rake task from console produces 'ArgumentError: no method name given' error -

i have rake task meant call mailer , email users meet given condition. but, when call rake task console using rake nagging_email:send following 'argumenterror: no method name given' , task not run. full console error log can seen here: https://gist.github.com/srt32/6433024

i have mailer set follows:

class workoutmailer < actionmailer::base     def nagging_email(user)       @user = user       subject = "what have done today?"       @url = 'http://frozen-taiga-7141.herokuapp.com/members/sign_in'        mail to: @user.email,         subject: subject.to_s     end end 

and rake task follows gets users meet given condition (being lazy) , calls mailer given user param:

namespace :nagging_email   desc "send nagging email lazy users"   task :send => :environment     daily_nag   end    def daily_nag     users = user.all     users.each |user|       unless last_workout(user) == date.today         workoutmailer.nagging_email(user).deliver       end     end   end    def last_workout(user)     user = user     last_workout = user.workouts.order("date desc").limit(1)     last_workout_date = last_workout.date     return last_workout_date   end end 

any trying figure out how run rake task appreciated. thanks.

you should run rake terminal, not rails console. if reason want rails console, should load tasks that

require 'rake' myrailsapp::application.load_tasks  rake::task['my_task'].invoke