upgrade - rails actionmailer error with 'part' method -

i'm upgrading rails 2.3.2 app ot rails 3. have unknown error sending email message in mailerformerror. mailerformerror model: class mailerformerror < actionmailer::base

at 1st have error 'deliver_send' method (undefined method `deliver_sent' mailerformerror:class), change 'send'. have this:

     nomethoderror in leadscontroller#create    undefined method `part' #  

my code in controller:

      @msg = {}     @msg["errors"] = @lead.errors     @msg["params"] = params     #mailerformerror.deliver_sent(@msg)     mailerformerror.sent(@msg)  

this class sending method:

        def sent(msg, sent_at = time.now)         @subject    = ("Ошибка при заполнении формы").force_encoding('iso-8859-1').encode('utf-8')         @recipients = 'mymail@gmail.com'         @from       = 'mymail@gmail.com'         @sent_on    = sent_at         @headers    = {}          part( :content_type => "multipart/alternative" ) |p|           p.part :content_type => "text/plain",                   :body => render_message("sent.plain.erb", :msg=>msg )         end        end 

1) rails 3, send notification in controller , have write :

mailerformerror.sent(@msg).deliver 

2) , have rewrite 'sent' method in rails 3 way :

def sent(msg, sent_at = time.now)   ...   mail(:to => '...', :from => '...', :subject => '...') |format|     format.html     format.text   end   ... end 

you can create text version , html in view directory app/views/mail_form_error : sent.text.erb , sent.html.erb