Simple .NET/ASP.NET PDF document editor web control SDK

Go to your Web browser of choice and access the application using the URL given by the WEBrick output (http://0.0.0.0:3000/ in this case, but it might be http:// localhost:3000/ or http://127.0.0.1:3000/ on your machine). You should see a page like the one in Figure 13-2.

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The page you re seeing is the index.html file from the public folder. This is because if no action is found within a Rails application that associates with the URL you re loading from your Web browser, a Rails application should return a file from the public folder if any file matches or an error message. Because the default page to load on a Web server is usually index.html, public/index.html is returned. When you generated the scaffolding for the Entry model, a controller called entries was created. By default, you access controller methods in a Rails application using a URL in the format of http://<hostname>/controller/action. So, with your application, load http://localhost/entries (replace localhost with whatever hostname is used on your local machine). No action name is specified, but by default an action name of index is assumed, and the scaffolding has implemented this. If you re successful, you ll see a basic list of entries, as shown in Figure 13-3.

Note There are actually two other ways to use raise. The argument may be a string, or you can call raise without any arguments. Using a string argument is considered obsolete; calling raise without arguments is covered in the section Look, Ma, No Arguments! later in this chapter.

Michael Alley, author of The Craft of Scienti c Presentations: Critical Steps to Succeed and Critical Errors to Avoid (Springer, 2005), conducted a study using two d PowerPoint presentations, each with a different headline format. One presentation included only sentence fragments at the top of each slide, and the second presentation included a complete sentence at the top that summarized the most important point of the slide. In tests to measure the knowledge and comprehension of the information in the presentations, the audiences who experienced the slides with the complete sentence headlines saw an average improvement in test scores of 11 percentage points over the audiences who saw the slides with the sentence fragments. When you use the title area of the slide to summarize your point for your audience, you properly guide their attention, and in the process you ease the burden on their working memory to gure out your point.

The list of entries in Figure 13-3 is noticeably bare. This is because your entries table has no data contained within it. The column headings for your table are obvious, though (Title, Content, and Created at), and a New entry link is available. Clicking New entry takes you to http://localhost/entries/new the new method within the entries controller and presents you with a page containing a form that allows you to fill out the data for a single entry. This view is demonstrated in Figure 13-4.

From this point you can create new entries, return to the list, edit those entries (the form looks similar to that in Figure 13-4) and delete entries. That covers all the CRUD functions! With scaffolding you get a basic, but complete, data-driven Web application with just a single line typed at the command prompt. However, next you need to look at what the scaffolding generator actually generated, and learn how to customize the models, controllers, and views to create the application that you want.