Agile Web Development with Rails 5 by Sam Ruby

By Sam Ruby

Rails five and Ruby 2.2 convey many advancements, together with new APIs and significant functionality improvements, and the 5th variation of this award-winning vintage is now up to date! if you are new to Rails, you will get step by step information. if you are an skilled developer, this ebook provides you with the great, insider info you would like for the newest model of Ruby on Rails.

Ruby on Rails is helping you produce high quality, beautiful-looking net purposes fast. you consider growing the appliance, and Rails looks after the main points. examine Rails the best way the Rails middle staff recommends it, besides the tens of millions of builders who've used this vast, far-reaching educational and reference.

We commence with a step by step walkthrough of establishing a true program, and in-depth chapters examine the integrated Rails positive aspects. stick with besides a longer instructional as you write a web based shop software. dispose of tedious configuration and housework; internationalize your functions; contain Ajax, leisure, internet companies, and electronic mail dealing with into your purposes; try your purposes as you write them utilizing the integrated trying out frameworks; and install your purposes simply and securely. New during this version is insurance of motion Cable, and fully up to date code for Rails 5.

Rails 1.0 used to be published in December 2005, greater than 10 years in the past. This e-book was once there from the beginning, and did not simply evolve along Rails, it developed with Rails. it's been built in session with the Rails center group. in reality, Rails itself is validated opposed to the code during this book.

What You Need:

All you wish is a home windows, Mac OS X, or Linux desktop to do improvement on. This ebook will take you thru the stairs to put in Rails and its dependencies. in case you aren't accustomed to the Ruby programming language, this ebook features a bankruptcy that covers the fundamentals essential to comprehend the fabric within the book.

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Example text

Our First Action At this point, we can see not only that we’ve connected the URL to our controller but also that Rails is pointing the way to our next step—namely, to tell Rails what to display. That’s where views come in. Remember when we ran the script to create the new controller? That command added several files and a new directory to our application. That directory contains the template files for the controller’s views. In our case, we created a controller named say, so the views will be in the app/views/say directory.

Erb file would contain the following: ...

Say Goodbye!

... erb file would point the other way: ...

Say Hello!

... report erratum • discuss Chapter 2. Instant Gratification • 32 This approach would certainly work, but it’s a bit fragile. If we were to move our application to a different place on the web server, the URLs would no longer be valid. It also encodes assumptions about the Rails URL format into our code; it’s possible a future version of Rails could change that format.

But occasionally you might not want to run that version. For example, a newer version with some fixes or new features might become available. Or perhaps you’re developing on one machine but intending to deploy on another machine that contains a version of Rails that you don’t have any control over. If either of these situations applies to you, you need to be aware of a few things. For starters, you can use the gem command to find out all the versions of Rails you have installed: $ gem list --local rails You can also verify which version of Rails you’re running as the default by using the rails --version command.

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