دانلود کتاب آموزش Ruby on Rails – آموزش توسعه وب با Rails – ویرایش سوم

Welcome to Ruby on Rails Tutorial: Learn Web Development with Rails. The purpose of this book is to teach you how to develop custom web applications, and our tool of choice is the popular Ruby on Rails web framework. If you are new to the subject, the Ruby on Rails Tutorial will give you a thorough introduction to web application development, including a basic grounding in Ruby, Rails, HTML & CSS, databases, version control, testing, and deployment— sufficient to launch you on a career as a web developer or technology entrepreneur. On the other hand, if you already know web development, this book will quickly teach you the essentials of the Rails framework, including MVC and REST, generators, migrations, routing, and embedded Ruby. In either case, when you finish the Ruby on Rails Tutorial you will be in a position to benefit from the many more advanced books, blogs, and screencasts that are part of the thriving programming educational ecosystem.1 The Ruby on Rails Tutorial takes an integrated approach to web development by building three example applications of increasing sophistication, starting with a minimal hello app (Section 1.3), a slightly more capable toy app (Chapter 2), and a real sample app (Chapter 3 through Chapter 12). As implied by their generic names, the applications developed in the Ruby on Rails Tutorial are not specific to any particular kind of website; although the final sample application will bear more than a passing resemblance to a certain popular social microblogging site (a site which, coincidentally, was also originally written in Rails), the emphasis throughout the tutorial is on general principles, so you will have a solid foundation no matter what kinds of web applications you want to build. One common question is how much background is necessary to learn web development using the Ruby on Rails Tutorial. As discussed in more depth in Section 1.1.1, web development is a challenging subject, especially for complete beginners. Although the tutorial was originally designed for readers with some prior programming or web-development experience, in fact it has found a significant audience among beginning developers. In acknowledgment of this, the present third edition of the Rails Tutorial has taken several important steps toward lowering the barrier to getting started with Rails.