ruby on rails 3 - difference between console email and rake email attachments -

i'm generating invoice pdf via wicket_pdf , works. pdf used attachment in email in later step of process.

# user.rb def send_last_invoice_email!(invoice)   usermailer.send_actual_invoice_email(self, invoice).deliver end  # user_mailer.rb def send_actual_invoice_email(user, invoice)   @user = user   @invoice = invoice   = @user.email   # problematic line   attachments["#{@invoice.file_name}"] = file.read(@invoice.file_name_path)   mail(:to => to) end  # console => works user = user.where("step_id = 1 , status = 0").last invoice = user.invoices.last user.send_last_invoice_email!(invoice)  # rake task => doesn't work desc "send email first user step_id => 1 testing purpose" task :send_mail => :environment   user = user.where("step_id = 1 , status = 0").last   invoice = user.invoices.last   user.send_last_invoice_email!(invoice) end 

when call rake task pdf empty. debugged , file name exists , original pdf file ok, attached pdf inside email empty.

i use letter_opener (1.0.0) in development mode.

does know, why there difference between console , executing same code via rake task? , how debug difference?

found problem. strange. found solution while comparing 2 pdfs in hex-editor.

in rake had set ruby standard encoding utf-8

# users.rake  namespace :users   encoding.default_external = encoding::utf_8   encoding.default_internal = encoding::utf_8   ... 

i hope maybe others profit 2 days effort :-). cheers