Source: http://snippets.dzone.com/posts/show/277

Create account or

DZone Snippets

8487 users tagging and storing useful source code snippets
Never been to DZone Snippets before?

Snippets is a public source code repository. Easily build up your personal collection of code snippets, categorize them with tags / keywords, and share them with the world
RoR Multi-step forms (See related posts)
Popular @ dzone.com




Which way you'll go in future - IronRuby, Vbx, ...

Programming Language Video Lectures

Eclipse PDT - PHP Meets Java?

Beans Binding (JSR 295)& Properties on JDK7

NetBeans IDE: Filthy Rich Client? (Part 2)

jMaki app using Google Gears

Installing Trac 0.11
Here's a controller code snippet for doing partial validations on Rails model objects:
private
def get_partial_user_from_session
unless @session['partial_user'].nil?
@user = @session['partial_user']
else
@user = User.new
end
end

def save_partial_user_in_session
unless @user.nil?
@session['partial_user'] = @user
end
end
# Might be a good addition to AR::Base
def valid_for_attributes( model, attributes )
unless model.valid?
errors = model.errors
our_errors = Array.new
errors.each { |attr,error|
if attributes.include? attr
our_errors << [attr,error]
end
}
errors.clear
our_errors.each { |attr,error| errors.add(attr,error) }
return false unless errors.empty?
end
return true
end


To ensure the errors are cleared out properly on each request add a before_filter with the following:
def clear_stage_errors
unless @session['partial_user'].nil?
@session['partial_user'].errors.clear
end
end


You can use
get_partial_user_from_session
and
save_partial_user_in_session
as before and after filters, respectively, so you only have to reference @user in your multi-step controller.

A clean way to arrange the view is to have each step in its own partial, and set a variable such as
@current_stage
in your controller, then in your view just do something like:
<%= start_form_tag({:action=> "signup"} , { :name => 'signupform' }) %>
<%= hidden_field_tag "changeCountry" %>
<%= hidden_field_tag "current_stage", "#{@current_stage}"%>

Registration Process

<%= @flash['notice'] %>

<%= render_partial "#{@current_stage}" %>
<%= end_form_tag %>


Your signup controller action could something similar to this:
def signup
case @request.method
when :post
@current_stage = @params['current_stage']
if @current_stage == "stage1"
@user.attributes = @params['user']
@current_stage = "stage2" if valid_for_attributes(@user,["login","attribute2"])
end
elsif @current_stage == "stage2"
@user.attributes = @params['user']
@current_stage = "stage3" if valid_for_attributes(@user,["attribute3","attribute4"])
elsif @current_stage == "stage3"
@user.attributes = @params['user']
if @user.save
@session[:user] = User.authenticate(@user.login, @params['user']['password'])
flash['notice'] = "Signup successful"
redirect_to :action => "home"
end
end
when :get
@current_stage = "stage1"
end
end
to ruby rails by toolmantim on Thu May 12 13:40:40 EDT 2005


You need to create an account or log in to post comments to this site.

Click here to browse all 4074 code snippets

Related Posts

» creating a select box on a table's contents in ruby rails html
» paginate on custom sql queries in rails in ruby rails pagination sql
» dynamic accessors on rails models in ruby rails
» Exceptions to layout usage in ruby rails layouts
» take tag names and return an array of tag object.. in ruby rails tags
» Pretty archive URLs in Typo with Routes in ruby rails routes typo urls


Snippets originally developed by Peter Cooper and powered by Ruby On Rails.

Copyright © 2007 DZone, Inc.