Jump Start Rails by Andy Hawthorne

By Andy Hawthorne

Jump commence Rails will give you a enjoyable and but sensible advent to Rails, a really renowned framework that makes it attainable to quick increase enormously strong net functions with Ruby. This brief ebook covers Rails four, the newest model of the framework, and whereas it's no longer meant to be a very entire Rails consultant or an in-depth Ruby educational, it's going to fast get you on top of things with Rails and provides you the arrogance to begin experimenting in your own.

The booklet is outfitted round a real-life instance undertaking: a private portfolio website. It's a enjoyable and simply comprehensible venture that's used to illustrate the recommendations defined within the publication in a realistic way.

this can be a transparent, approachable and extremely easy-to-follow booklet that may get you to to hurry with Rails in no time.

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Example text

Css at run time. Neat, eh? Putting up Some Scaffolding We now have a simple app that responds to requests for static pages. We'll use this knowledge for our personal website's info pages. A simple blog engine is also one of the features for our main app. While we're working with the training app, it's worth taking a look at a feature in Rails called scaffolding. Scaffolding lets you quickly create a resource that interacts with the database. You pass in the field names that you want, and Rails pretty much does the rest.

Erb. This one looks after the whole app. But what if you wanted a layout for a particular controller? No problem. All you need to do is create a layout file that has the same name as one of your controllers. erb in app/views/layouts and add Starting an App the code below we create something known as a code spike. This means it's proofof-concept code. We'll learn more about code spikes later on in this chapter. DOCTYPE html> Training <%= stylesheet_link_tag "application", :media => "all", ➥"data-turbolinks-track" => true %> <%= javascript_include_tag "application", "data-turbolinks➥track" => true %> <%= csrf_meta_tags %>

This is the layout for the pages controller

<%= yield %>

You've probably guessed that <%= yield %> gets replaced with the contents of the view that we load from the controller action.

This is Rails, so we can do just that. invalid? any? any? any? Can you see how this addresses the issue about tests versus validations? This test creates a new post, fires it at the model, and then ensures that the model correctly fires errors back because the fields can't be blank. How awesome is that? You can run the tests with rake test:units, too. This means we know that the model is working in its most basic form. We can now drill down and do some specific testing. For example, our validations say that the blurb field should only accept text.

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