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Acts as Authenticated is a great plug-in that provides us with a rather large amount of functionality for supporting both automated user registration and user authentication with very little pain in configuration. Plus, since it s designed as a plug-in, we can easily integrate it into our application without being forced into any corners on how we use it. So let s go ahead and install Acts as Authenticated. Go to the root of your application, and install the plug-in by running this command: ruby script/plugin install http://svn.techno-weenie.net/projects/plugins/acts_as_authenticated/ ./acts_as_authenticated/CHANGELOG + ./acts_as_authenticated/README + ./acts_as_authenticated/generators/authenticated/USAGE + ./acts_as_authenticated/generators/authenticated/authenticated_generator.rb + ./acts_as_authenticated/generators/authenticated/templates/authenticated_system.rb + ./acts_as_authenticated/generators/authenticated/templates/ authenticated_test_helper.rb + ./acts_as_authenticated/generators/authenticated/templates/controller.rb + ./acts_as_authenticated/generators/authenticated/templates/fixtures.yml + ./acts_as_authenticated/generators/authenticated/templates/functional_test.rb + ./acts_as_authenticated/generators/authenticated/templates/helper.rb + ./acts_as_authenticated/generators/authenticated/templates/index.rhtml + ./acts_as_authenticated/generators/authenticated/templates/login.rhtml + ./acts_as_authenticated/generators/authenticated/templates/migration.rb + ./acts_as_authenticated/generators/authenticated/templates/model.rb + ./acts_as_authenticated/generators/authenticated/templates/signup.rhtml + ./acts_as_authenticated/generators/authenticated/templates/unit_test.rb + ./acts_as_authenticated/generators/authenticated_mailer/USAGE + ./acts_as_authenticated/generators/authenticated_mailer/ authenticated_mailer_generator.rb + ./acts_as_authenticated/generators/authenticated_mailer/templates/activation.rhtml + ./acts_as_authenticated/generators/authenticated_mailer/templates/notifier.rb + ./acts_as_authenticated/generators/authenticated_mailer/templates/notifier_test.rb + ./acts_as_authenticated/generators/authenticated_mailer/templates/observer.rb + ./acts_as_authenticated/generators/authenticated_mailer/templates/ signup_notification.rhtml + ./acts_as_authenticated/install.rb + ./acts_as_authenticated generator Now that we have the plug-in installed, we need to install it into our application by running the following generator to create the authentication models, views, and controllers that we ll be customizing for our needs: ruby script/generate authenticated user account

This code is pretty straightforward. It populates a list of available players and games, which is passed to your view. Let s take a look at that view next. The first part of the view for the application (Listing 5-17) uses the @available_players and @available_games variables, and constructs two select boxes, which let users choose a player and game combination to view:

Event.observe(window, 'load', addObservers);

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<h1>Team Performance Reporting</h1> <div id="top"> <%=select 'player', 'id', [['Click here to select a player',""]] + @available_players.map { |p| [p.name, p.id] }, {:include_blank=>false} %> <%=select 'game', 'id', [['Click here to select a game',""]] + @available_games.map { |g| [g.name, g.id] }, {:include_blank=>false} %> </div> <div id="chart"> </div>

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Make these changes to breakfast.js, and then reload the page. Our error is gone and, more to the point, the Ajax form submission works this time! Wait, no. Never mind. Something else is wrong (see Figure 5-5). What could be causing this The only thing on the page is the HTML fragment that should ve been injected into our other page. Look at the address bar. When we submitted the form, the browser went to breakfast.php, the URL in the form s action attribute. Following that URL is the submit event s default action. That means we re at fault again. When we submitted the form, submitEntryForm was called as we intended. But we didn t hijack the submit event; we just listened for it. If we want to suppress this default action, we must explicitly say so.

This code creates two drop-down lists from the data passed from the controller. You use the map method to turn each array of Active Record objects into the type of array that the select tag expects: an array of arrays, with the first element as the label and the second element as the value. This means that for the player Matthew Gifford, for example, the player s name will be displayed in the drop-down list, but the control will actually have the value 1 (the player s ID), which you ll use to display the appropriate chart. This code also puts a blank Click here to select . . . entry at the top of each drop-down list. This entry has a label but no value, and it serves to tell the user what to do. The second div, which has the ID chart, will be used to store the chart. The following JavaScript makes that happen:

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