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Note that multiple directories are separated by semicolons If the previous tactic doesn t work, you can edit the file autoexecbat, which you can find (assuming that you have a relatively standard setup) in the top directory of the C drive Open the file in Notepad (or the IDLE text editor, for that matter) and add a line setting the PYTHONPATH If you want to add the directory C:\python you type the following: set PYTHONPATH=%PYTHONPATH%;C:\python For information on setting up Python in Mac OS, see the MacPython pages at http://cwinl/~jack/ macpython..

Description: Cancels an invoice. Return: Boolean; true if successful. Argument: $invoice_increment_id (required). This is the invoice number.

Open app/controllers/account_controller.rb and add the flash message to show for failed logins: class AccountController < ApplicationController # If you want "remember me" functionality, add this before_filter to Application Controller before_filter :login_from_cookie # say something nice, you goof! something sweet. def index redirect_to(:action => 'signup') unless logged_in || User.count > 0 end

Depending on which operating system you are using, the contents of PYTHONPATH varies (see the sidebar Environment Variables ), but basically it s just like sys.path a list of directories.

// Prepare the data $invoice_increment_id = '200000001'; // Capture invoice $result = $client->call('call', array($session_id, 'sales_order_invoice.cancel', array($invoice_increment_id)) ); // Display true if successful var_dump($result);

def login return unless request.post self.current_user = User.authenticate(params[:login], params[:password]) if current_user if params[:remember_me] == "1" self.current_user.remember_me cookies[:auth_token] = { :value => self.current_user.remember_token , :expires => self.current_user.remember_token_expires_at } end redirect_back_or_default(:controller => '/account', :action => 'index') flash[:notice] = "Logged in successfully" end flash.now[:notice] = "Incorrect login!" end ... Running the test again shows all green, so try it out in the browser. Figure 8-2 shows the result. As you can see, the plugin is doing its job.

Tip You don t have to change the sys.path by using PYTHONPATH. Path configuration files provide a useful shortcut to make Python do it for you. A path configuration file is a file with the file name extension .pth that contains directories that should be added to sys.path; empty lines and lines beginning with # are ignored. Files beginning with import are executed.

The inventory API allows you to list and update item status and quantity. There are two methods at your disposal: cataloginventory_stock_item.list() cataloginventory_stock_item.update()

Let s finish off by adding links for logging in and out in the default layout file, app/views/ layouts/application.rhtml: <div id="header"> <h1 id="logo">Emporium™</h1> <h2 id="slogan">Books on Rails</h2> <p id="loginlogout"> <% if current_user %> Logged in as <%= current_user.login %> (<%= link_to "Logout", :controller => "/account", :action => "logout" %>) <% else %> <%= link_to "Login", :controller => "/account", :action => "login" %> <% end %> </p> </div> Finally, let s add a bit of styling for the #loginlogout box. Open public/stylesheets/ style.css and add the following rules at the bottom of the file: #loginlogout { background-color: #ccc; padding: 8px; width: 100px; position: absolute; top: 0px; right: 10px; } Now the login status box appears in the top-right corner of the page, as shown in Figure 8-3.

Method: cataloginventory_stock_item.list ($product_ids)

For a path configuration file to be executed, it must be placed in a directory where it can be found. For Windows, use the directory named by sys.prefix (probably something like C:\Python22), and in UNIX, use the site-packages directory. (For more information, look up the site module in the Python Library Reference. This module is automatically imported during initialization of the Python interpreter.)

To implement the third user story, Reset Password, we need a way to send e-mail messages from our application. The acts_as_authenticated plugin comes with a generator for this, too. Execute the following command: $ script/generate authenticated_mailer user exists create exists create create create create create app/models/ app/views/user_notifier test/unit/ app/models/user_notifier.rb app/models/user_observer.rb test/unit/user_notifier_test.rb app/views/user_notifier/activation.rhtml app/views/user_notifier/signup_notification.rhtml

Description: Returns stock information on a set of products. Return: Array. Argument: $product_ids (required). An array of product_id or product_sku.

There are two interesting things created by the generate authenticated_mailer command: UserNotifier (an ActionMailer object) and UserObserver (an observer). Even though neither of them is a normal ActiveRecord model, they both reside in the app/models directory. We ll cover the mailer part now and talk about observers after we update the User model.