Rails User Sessions: Remember Me for 2 Weeks!
Author: ceefour | Filed under: Ajax, Opinions, Rails, Ruby, Tips, Web 2.0If you're new here, you may want to subscribe to my RSS feed. Thanks for visiting!
You must have grown tired of seeing those “Remember me for two weeks” check box on every web site’s login form. Ever wonder how to do that in Ruby on Rails?
It turns out, you can make use of ActionController’s session management methods for this purpose:
- Set ::ActionController::Base.session_options[:session_expires] to the maximum amount of time to remember the session
- Call reset_session whenever the user logs out
Here’s a complete source code for of controller that does exactly this (and only this):
class MainController < ApplicationController
def index
render :inline => %Q{
<%= h(flash[:notice]) %><br/>
<% if session[:me] %>
You are logged on as <%=h (session[:me]) %>. <%= button_to 'Logout', {:action => 'logout'} %>
<% else %>
<% form_tag({:action => 'login'}) do %>
Please login: <%= text_field_tag 'username' %>
<label for="remember"><%= check_box_tag 'remember' %> Remember me</label>
<%= submit_tag %>
<% end %>
<% end %>
}
end
def login
::ActionController::Base.session_options[:session_expires] =
params[:remember] ? 2.weeks.from_now : nil
session[:me] = params[:username]
flash[:notice] = 'Login successful.'
redirect_to :action => 'index'
end
def logout
reset_session
flash[:notice] = 'You have logged out'
redirect_to :action => 'index'
end
end
To try the above application, create a skeleton Rails application (e.g. by running rails myapp) then put the above code into app/controllers/main_controller.rb. Run the script/server script then you should be able to check it out by browsing http://localhost:3000/main.
Sweet! 
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