By Dave Thomas, David Heinemeier Hansson, Leon Breedt, Mike Clark, Thomas Fuchs, Andrea Schwarz
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Additional info for Agile web development with rails: a Pragmatic guide
By setting the time to display in the controller, we make our application more flexible—we can change the display format and time zone in the controller without having to update any view that uses that time object. The Story So Far Let’s briefly review how our current application works. 1. The user navigates to our application. In our case, we do that using a local URL such as http://localhost:3000/say/hello. 2. Rails analyzes the URL. rb). 3. The next part of the URL path, hello, identifies an action.
4: Showing Details and Editing That’s why the New products form came up already knowing about the title, description, image, and price fields—because they are in the database table, they are added to the model. The form generator used by the scaffold can ask the model for information on these fields and uses what it discovers to create an appropriate HTML form. Controllers handle incoming requests from the browser. A single application can have multiple controllers. For our Depot application, it’s likely that we’ll end up with two of them, one handling the seller’s administration of the site and the other handling the buyer’s experience.
We’ll see how to create simple maintenance pages, link database tables, handle sessions, and create forms. Over the next eight chapters, we’ll also touch on peripheral topics such as unit testing, security, and page layout. 1 Incremental Development We’ll be developing this application incrementally. We won’t attempt to specify everything before we start coding. Instead, we’ll work out enough of a specification to let us start and then immediately create some functionality. We’ll try things out, gather feedback, and continue on with another cycle of mini-design and development.