Download E-books Rails for .NET Developers (Facets of Ruby) PDF

By Jeff Cohen, Brian Eng

Learning a brand new language and a brand new framework should be daunting. What you would like is a consultant to assist leverage your latest wisdom and abilities, and convey you simply what you must be aware of to wake up and working with a brand new procedure quickly.

You're already a .NET developer; we will assist you wake up and operating as a Ruby on Rails developer on any working method: home windows, Mac, or Linux. we begin with a steady advent to the object-oriented Ruby language with examples and direct comparisons to C#, so you are going to fast suppose at domestic writing Ruby code for the 1st time.

We then get to the guts of Rails improvement by way of displaying find out how to take on daily projects in Rails in comparison with general ASP.NET implementations, with an educational concentration. you will construct a pattern airline reservation approach utilizing Rails, studying crucial thoughts alongside the way in which. you are going to come to benefit the enjoyment and tool inherent within the "convention over configuration" philosophy, the usual splendor of the MVC structure, and the essence of REST-based layout as you improve functions that accommodate net browsers, hand held units, or even XML internet carrier consumers with unheard of ease.

Along the way in which, you will see reliable agile improvement practices, discover test-driven improvement with Rails. you can be ready for real-world software deployment, and we are going to offer you a style of the way Ruby and Rails are reshaping the Microsoft program panorama, together with a glance at IronRuby.

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How Do I Roll again My Database to a prior model? Migrations can be undone: C:\dev\book_tracker> rake db:rollback additionally, the rake job used emigrate up additionally accepts an non-compulsory parameter with the objective model. for instance, the next command might additionally migrate the database again to model 20080722191828: C:\dev\book_tracker> rake db:migrate VERSION=20080722191828 Ruby obtain instant/20080722191930_add_purchased_on_to_books. rb category AddPurchasedOnToBooks < ActiveRecord::Migration def self. up add_column :books, :purchased_on, :date finish def self. down remove_column :books, :purchased_on finish finish Now, we’ll execute the migration: C:\dev\book_tracker> rake db:migrate (in C:/dev/book_tracker) == 20080722191930 AddPurchasedOnToBooks: migrating ==================== -- add_column(:books, :purchased_on, :date) -> zero. 0470s == 20080722191930 AddPurchasedOnToBooks: migrated (0. 0470s) =========== Now that we’ve further the recent box to the database, the final step is so as to add the recent box to the pages used to create, edit, and demonstrate books. Open app/views/books/new. html. erb, and you’ll become aware of that the scaffolding created code that generates textual content fields for the name and writer fields, in addition to a checkbox for the “on mortgage” flag. The tools text_field and check_box during this code are often called shape helpers. those helper equipment inform Rails to teach textual content enter and checkbox enter HTML tags, respectively, while the web page is rendered. for the reason that we’ve extra a date column to the database, lets use a textual content enter box if we would have liked, yet normally, the date_select helper approach to reveal the date enter utilizing 3 drop-down packing containers is a extra appealing selection. obtain at Boykma. Com record erratum ready solely for Trieu Nguyen this reproduction is (P2. zero printing, December 2008) I NSTANT G RATIFICATION —Y OUR F IRST R AILS A PP Ruby 29 obtain instant/new. html. erb

New book

<%= error_messages_for :book percent> <% form_for(@book) do |f| percent>

Title
<%= f. text_field :title percent>

Author
<%= f. text_field :author percent>

On loan
<%= f. check_box :on_loan percent>

Purchased on
<%= f. date_select :purchased_on percent>

<%= f. post "Create" percent>

<% finish percent> <%= link_to 'Back', books_path percent> Head on over to http://localhost:3000/books back, and provides it a attempt. Upon traveling the “create booklet” web page, you need to see whatever just like what’s proven in determine 1. 2, at the subsequent web page. utilizing an identical method, you'll want to additionally cross forward and improve app/views/new. html. erb within the similar means. extra One-Liners—Validating enter As we’ve noticeable to this point, Rails is the king of the one-liners. those basic instructions characterize most of the little stuff you have to flip your app from a suite of straightforward kinds right into a full-blown internet software. attempt to create a brand new publication without identify and no writer. You’ll locate that there’s no validation fighting that from occurring. fortunately, there’s an effective way to mend that. Open app/models/book.

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