By Dave Thomas
I purchased this one with 'Programming Ruby' pondering that i might desire either to appreciate what RoR is all approximately, yet 'Programming Ruby' continues to be at the shelf and in a number of days i used to be working the procuring cart instance. wonderful means to profit the right way to use the framework. And from what I observed, the recent model is evolving on the related speedy velocity as Rails. that is my subsequent purchase.
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Additional info for Agile Web Development with Rails: A Pragmatic Guide (Pragmatic Programmers)
But there’s more to this id column. 1 Internally, Rails uses the value in this column to keep track of the data it has loaded from the database and to link between data in different tables. You can override this naming system, but unless you’re using Rails to work with legacy schemas that you can’t change, we recommend you just stick with using the name id. It’s all very well coming up with the DDL for the products table, but where should we store it? I’m a strong believer in keeping the DDL for my application databases under version control, so I always create it in a flat file.
Ho! Merry Christmas! Note how the text in the file within the Ruby loop is sent to the output stream once for each iteration of the loop. Report erratum 33 H ELLO , R AILS ! We can mix the two forms. In this example, the loop sets a variable that is interpolated into the text each time the loop executes.
<% end %> Lift off! That will send the following to the browser.
Lift off! There’s one last thing with ERb. %> contain less-than and ampersand characters that are significant to HTML.
In our case, we’ll also use a new action method to handle the page (although that isn’t always the case, as we’ll see later in the book). We’ll use the same controller for both actions. Again, this needn’t be the case, but we have no compelling reason to use a new controller right now. We already know how to add a new view and action to a Rails application. To add the action, we define a new method in the controller. Let’s call this action goodbye. Our controller now looks like the following. 6: A Basic Goodbye Screen Next we have to create a new template in the directory app/views/say.
Agile Web Development with Rails: A Pragmatic Guide (Pragmatic Programmers) by Dave Thomas