learning ruby on rails for beginners pdf

... focuses on reducing information duplication by keeping any piece of knowledge in a system in only one place For example, in ActiveRecord (a major component of Ruby on Rails), schema information doesn't ... application framework built on Ruby Ruby on Rails follows two basic guiding principles—Convention over Configuration and Don't Repeat Yourself (DRY) Convention over Configuration is a programming design ... those conventions For example in Ruby on Rails, the convention states that a controller for a model object Book will be called BookController and all view pages relating to that controller will

Ngày tải lên: 20/03/2019, 14:24

... prototype form_tag(url_for_options = {}, options = {}) Theform _ tagfunction takes in a block for the form; when the block ends, it automat-ically produces the</form>tag to end the form This ... (that is, non-form _ for) form On the back-end, the action is trivial for now: Trang 25Listing 11.17 app/views/controllers/community controller.rb<%= render :partial => "browse_form" ... search form.rthml <% form_tag({ :action => "search" }, :method => "get") do %> This is the first time we’ve constructed a form without using theform _ forfunction, which

Ngày tải lên: 13/08/2014, 08:20

... Browsing for an avatar image.The first step is to add a small error check to thesuccessful _ conversion?tion By convention, system calls returnfalseon failure andtrueon success, so wecan test for ... general Email controller to handle the various email actions on RailsSpace, starting with aremindaction: > ruby script/generate controller Email remind exists app/controllers/ Trang 17Forgot your ... part ofsuccessful _ conversion?touches on a question we haven’t yet answered: What exactly is an “image” in the context of a Rails upload? One might expect that it would be a Ruby File object, but

Ngày tải lên: 13/08/2014, 08:20

... section, one aspect of REST involves responding to different requests with different formats, depending on the format expected by the request In Rails we can accomplish this with a trivial addition ... puts such sharp constraints on our URLs—no actions,explicit ids, filename extensions for different formats, and a consistent and struc-tured way to add modifiers—RESTful applications effectively ... look at it before we modify it for use on RailsSpace Inside the Posts controller, thecreate,show,update, anddestroyactions cor-respond to the create, read, update, and delete operations of CRUD,

Ngày tải lên: 13/08/2014, 08:20

... webserver For now, we’ll go with Mongrel and Apache. Installing Mongrel is simple using Ruby gems: > sudo gem install mongrel Then, to start the Mongrel application server for Rails, runmongrel_railsin ... recommendations for a production Rails tion: applica-• Linux/Apache/Mongrel for deployment • Cachingmod_proxy_balanceand shared nothing and for scaling • Subversion or darcs for version control • Capistrano ... application: > cd rails_space Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com Trang 1917.1 Deployment considerations 509This starts Mongrel running as a daemon (-d)

Ngày tải lên: 13/08/2014, 08:20

... Ruby on Rails ::The New Gem of Web Development Ross Pallan IT Project Manager Argonne National Laboratory rpallan@anl.gov 2 Ruby on Rails  Ruby on Rails is a web application framework ... is Ruby? 4 What is Rails? Ruby on Rails or just Rails (RoR)  Rails is an open source Ruby framework for developing database-backed web applications.  Created by David Heinemeier Hansson – ... Eclipse, RadRails  Installing Ruby for Windows – Download the “One-Click Ruby Installer from http://rubyinstaller.rubyforge.org  Installing Ruby for Mac – It’s already there!  RubyGems is

Ngày tải lên: 24/10/2014, 13:03

... Framework Rails 7 2.1 Giới thiệu về Ruby on Rails(Rails) 7 2.1.1 Nguồn gốc của Rails 7 2.1.2 Triết lý của Rails 8 2.1.3 Tự động sinh code trong Rails 9 2.1.4 Vòng đời phát triển ứng dụng trong ... website vừa và nhỏ Còn Ruby on Rails được xem như là công nghệ web tương lai Một điểm rất mạnh nữa mà Ruby on Rails đem lại cho người lập trình đó là tốc độ phát triển Với Ruby on Rails việc phát triển ... model-view-controller được đặt trong thư mục con của thư mục app với cái tên tương ứng là models, views, controllers Sự phân chia trong rails còn tiếp tục trong phạm vi code mà bao gồm bên trong cả

Ngày tải lên: 18/03/2015, 10:20

... định nghĩa trong các thư viện chuẩn của Ruby  Ký tự String là lớp dùng để thể hiện chuỗi ký tự Khác với Java String trong Ruby là “mutable” String trong Ruby có thể được khai báo trong dấu ngoặc ... chung về Ruby xx x II Tổng quan về Ruby 1 Giới thiệu chung về Ruby Cha đẻ của Ruby là Matshumoto Yukishiro hay còn được biết đến với tên Matz Ruby là sự kết hợp thành công của Smalltalk, Python, Perl, ... cũng như là form, tag,asset.Định tuyến được tạo một cách đơn giản trong Padrino, ta có thể định nghĩa một tệpcontroller bất kỳ trong khi hệ nó đang được truy cập bởi hệ thống  Rails Rails là một

Ngày tải lên: 15/05/2015, 10:46

... 11T ng quan v Ruby ổng quan về Ruby ề RubyTrang 12T ng quan v Ruby ổng quan về Ruby ề RubyTrang 13T ng quan v Ruby ổng quan về Ruby ề Ruby end ary = [ "fred", 10, 3.14] for j in ary ... ngữ ữ Ruby Trang 2N i dung chính ộiI T ng quan v Ruby ổng quan về Ruby ề Ruby II Ruby Advance 2 Trang 3T ng quan v Ruby ổng quan về Ruby ề RubyYukihiro Matsumoto (Matz) Trang 4T ng quan v Ruby ... 15T ng quan v Ruby ổng quan về Ruby ề Rubyclass Hello [< Class] def initialize( name ) Trang 16T ng quan v Ruby ổng quan về Ruby ề RubyTrang 17T ng quan v Ruby ổng quan về Ruby ề Ruby M t s

Ngày tải lên: 20/05/2015, 08:10

... services, information and user Group Procurement Service management managed service only, events, promotions that they have rights Group users only see the information, register for the service ... nhiều công sức Trong quá trình đó, công ty đã quyết định xây dựng Ajax trong Rails, các hàm chức năng của Ajax được đưa vào trong framework Kết quả là Ruby on Rails trở thành một trong những framework ... phần nhỏ trong kiến trúc cũng như là ngôn ngữ mà Rails sử dụng Sau đây là một số thành phần đã đóng góp vào sự thành công của framework Ruby on Rails  Sự linh hoạt của ngôn ngữ Ruby mà Rails sử

Ngày tải lên: 12/01/2016, 19:50

... articleWhat is Ruby on Rails?For a deeper understanding of Rails, including background on the guiding principles of Rails, and reasonsfor its popularity, read the article for a complete introduction Here ... first step on your path to learn Ruby on Rails You’ll learn key concepts so you’ll have a solid foundation for continued study You’ll build a working web application so you’ll gain hands-on experience ... and conventions for building a web application using the Ruby language Rails is also a library or collection of gems that developers use as the core of any Rails web application By using Rails,

Ngày tải lên: 28/08/2016, 13:17

... impression most users will have of our app [ 85 ] www.it-ebooks.info App Billing and Publication The images will need to conform to the size and resolution specifications listed on the form, so contact ... winner, selecting 41-43 RSpec 28 Ruby installing 18 Ruby in Steel URL 16 Ruby management tool installing 17 RubyMine URL 16 Ruby on Rails® about 15 URL 15 Ruby Version Manager (RVM) installing 17, ... verifying 64, 65 I C Concurrent Versions System (CVS) 22 constant 78 D DashboardController class 20 development environment application directory, creating 18 Ruby, installing 18 Ruby management tool,

Ngày tải lên: 07/01/2017, 20:51

... we have done so far is manual Production Mode When the Mongrel server is run in the production mode, it provides the production environment for your application In the production environment, ... talewiki_production Then, only RoR will use the production database This is due to the 'Convention-over-Configuration' philosophy of RoR When Mongrel runs in the production mode, it looks for the database ... Started with Ruby and RoR Ruby and RoR—The Next Level in Dynamic Web Development Ruby Ruby on Rails (RoR) Philosophy Features Installing and Configuring Ruby and RoR Manual Installation Downloading

Ngày tải lên: 07/04/2017, 16:31

... Stanford, California 94305, USA 1 Rolling with Ruby on Rails, Curt Hibbs 20-Jan2005 http://www.onlamp.com/pub/a/onlamp/2005/01/20/rails.html 2 irc://irc.freenode.org/rubyonrails 3 http://lists.rubyonrails.org/mailman/listinfo/rails ... Rails, judge for yourself! Documentation: this document contains highlighted references, either to: • Documentation – the Rails documentation at http://api.rubyonrails.com (this documentation is also ... should see the Congratulations, you've put Ruby on Rails! page in your browser) Versions of Rails By the time you read this document, Rails will probably have moved on several versions If you intend

Ngày tải lên: 17/04/2017, 08:38

... Visual Basic for Applications (VBA) If you need a very specific program for your business analysis,something for personal use, or even just for having fun, you need VisualBasic for Applications now! ... button inthe spreadsheet This kind of button are very different than Form Buttons,because these ones work directly with VBA Trang 23Let’s add some functionality which can’t be done using Macros only ... tell you the button you pressed It means that if you can knowwhat button is pressed on then you can control an action according to it ForExample execute a Macro If is the conditional Like: Public

Ngày tải lên: 18/10/2018, 22:46

... everything—from the reusable components in the form of plug-ins to the way database tables are mapped Convention-over-Configuration (CoC): Configuration has taken over the web application frameworks so much ... choice I use the InstantRails directory Configure Instant Rails Installation The first step is to configure the environment of the installation To do so, click on the InstantRails.exe file within ... Rails directory Once configuration is done, you will be presented with the main application window What the configuration does is that it updates the configuration files for the Apache web-server

Ngày tải lên: 12/03/2019, 13:24

... của Ruby on Rails Ruby on Rails bao gồm các tính năng giúp tăng hiệu suất làm việc Sau đây là một số tínhnăng chính của nó:  Kiến trúc MVC: Ruby on Rails dựa trên kiến trúc MVC (Model View Controller) ... II Demo Ruby On Rails 24 CHƯƠNG III:KẾT LUẬN 27 DANH MỤC TÀI LIỆU THAM KHẢO 28 Trang 5CHƯƠNG I: TỔNG QUAN VỀ RUBY ON RAILS FRAMEWORKHiện phiên bản mới nhất và ổn định của Ruby là 1.9.2 2 Ruby là ... thì cộng đồng Rails cũng đã đóng góp bổ sung hàng mở rộng nó, và sửa các lỗi được tìm thấy Và phiên bản mới nhất của Rails bây giờ là phiên bản 3.2.3 2 Ruby on Rails là gì? Ruby on Rails, hay còn

Ngày tải lên: 03/08/2020, 21:02

... (IDE) for Ruby on Rails. In the name RadRails, the Rad stands for “Rapid application devel- opment” (and, of course, Rails stands for Rails ). RadRails is based on the Eclipse platform — an open ... if you want, but you won’t use it for the remainder of this chapter. Creating a New Ruby on Rails Project RadRails is an integrated development environment for Ruby on Rails. (See Chapter 2.) ... your database connection. Fortunately, trou- bleshooting the connection is the topic of the next section. Troubleshooting your database connection What do you do if you can’t connect to your...

Ngày tải lên: 27/03/2014, 00:02

... Associations 270 One-to-one Relationships 270 One-to-many Relationships 271 Many-to-many Relationships 271 Auto-generated Methods 273 Association Extensions 280 ActiveRecord Validations 281 Validation ... mastery of web application development with Rails. Beginning Ruby on Rails 978-0-470-06915-8 This book is for anyone who wants to develop online applications using Ruby and Rails. A basic understanding ... their application. Most Web applications share common elements and Rails requires confi guration only when the conven- tions adopted by the framework are not endorsed and, therefore, need to be...

Ngày tải lên: 28/04/2014, 16:58

... comments below contain some suggestions for approaching the Rails Tutorial depending on your background. All readers: One common question when learning Rails is whether to learn Ruby first. The ... blog post or discussion-forum thread. 1.1.1 Comments for Various Readers The Rails Tutorial contains integrated tutorials not only for Rails, but also for the underlying Ruby language, the RSpec ... version control system is a required skill for every software developer. There are many options for version control, but the Rails community has largely standardized on Git, a distributed version...

Ngày tải lên: 16/02/2014, 13:20