Missing template application_mailer/mailer with "mailer". Searched in: * "application_mailer"

Question

i have to develop a mailer using ruby on rails and i keep getting that error, I don't know how to correct it, I have tried a lot of methods. This is my code

class ApplicationMailer < ActionMailer::Base

  layout 'application_mailer'

  def mailer(user)
    @user = user
    mail to: user.email, subject: "Welcome"
  end
end

Answer 1

create mailer.html.erb under app/views/application_mailers

mailer action need view to render so it is searching for application_mailers/mailer.html.erb which is missing I think