Rails - Jan 2006 - handling AR object in multistage forms

in a multi-stage form, what is the proper way for handling the passing
of the object thru each step ?

If i have a database called events, and my controller looks like

step = @params[:step] || 1

if step == 1
  @event = Event.new
  @event = @session[:event] if @session[:event]

elsif step == 2
  @event = Event.new
  @event = @params[:event]

elsif step == 3
  @event = Event.new
  @event = @params[:event]
  @session[:event] = @event

  if @event.save
    flash[:notice] = ''Event saved''
    @session[:event] = nil
    redirect_to => :index
  else
    render("step1")
  end

end

  This doesnt seem right, any guidance would be appreciated.

thanks
adam

Try something like this:

class YourController < ApplicationController
  before_filter :normalize_session

  def normalize_session
    @event = session[:event] ||= Event.new
  end

  def process
    step = params[:step] || 1
    @event.attributes = params[:event] if params.has_key? :event
    
    if step < 3
      # render step
    else
      if @event.save
        flash[:notice] = ''Event saved''
        session[:event] = nil
        redirect_to :action => :index
      end
    end
  end
end

You may alse consider breaking each step into its own action, and chaining them
with logic in your controller.

Regards,

Jeff

----- Original Message ----
From: Adam Denenberg <straightflush@gmail.com>
To: rails@lists.rubyonrails.org
Sent: Wed Jan 11 17:08:36 2006
Subject: [Rails] handling AR object in multistage forms

in a multi-stage form, what is the proper way for handling the passing
of the object thru each step ?

If i have a database called events, and my controller looks like

step = @params[:step] || 1

if step == 1
  @event = Event.new
  @event = @session[:event] if @session[:event]

elsif step == 2
  @event = Event.new
  @event = @params[:event]

elsif step == 3
  @event = Event.new
  @event = @params[:event]
  @session[:event] = @event

  if @event.save
    flash[:notice] = ''Event saved''
    @session[:event] = nil
    redirect_to => :index
  else
    render("step1")
  end

end

  This doesnt seem right, any guidance would be appreciated.

thanks
adam
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