IncomingTicketHandler.rb

class IncomingTicketHandler
  require 'rubygems'
  require 'tmail'
  
  def self.receive(email)
    ticket = Ticket.new
    ticket.title = email.subject
    ticket.body = email.body
    ticket.assignedTo = email.to
    ticket.creator = email.from
    ticket.priority = 1
    ticket.save
    ticket
  end
end

# verses...

class IncomingTicketHandler
  def self.receive(email)
    # create! causes an exception to be thrown if Ticket validation fails. This may
    # not be what you want. Example usage:
    # begin 
    #   ticket = IncomingTicketHandler.receive(some_message)
    # rescue ActiveRecord::RecordInvalid => error
    #   # handle invalid ticket ...
    #
    # If you dont want an exception raised on an invalid ticket consider Ticket.create instead.
    # Remember that Ticket.create will not save if there are validation errors.
    # So if you use Ticket.create you will need to handle validation in the caller. For
    # example:
    #  ticket = IncomingTicketHandler.receive(some_message)
    #  unless ticket.save
    #    # handle invalid ticket...
    #  end
    Ticket.create!(:title => title, :body => email.body, :assignedTo => email.to,
                   :creator => email.from, :priority => 1)
  end
end

TicketsController.rb

  # GET /tickets/new
  # GET /tickets/new.xml
  def new
    @ticket = Ticket.new
    @creators = User.find(:all)
    @clients = Array.new
    @assigned_tos = User.find(:all)
        @assigned_tos.each do |e|
      if e.role.exists?(:name => "Client")
        @clients << e
      end
    end
    @assigned_tos = @assigned_tos - @clients
    respond_to do |format|
      format.html # new.html.erb
      format.xml  { render :xml => @ticket }
    end
  end

# verses...

  # GET /tickets/new
  # GET /tickets/new.xml
  def new
    @ticket = Ticket.new
    all_users = User.(:all)
    @creators = all_users.dup
    @clients = all_users.select(&:client?)
    # this also works: 
    # @clients = all_users.select{|user| user.client? }
    @assigned_tos = all_users - @clients
    # this would work as well, use whatever you find more clear
    # @assigned_tos = all_users.reject(&:client?)
    
    respond_to do |format|
      format.html # new.html.erb
      format.xml  { render :xml => @ticket }
    end
  end