Crafting Rails 4 Applications. Expert Practices for Everyday by Jose Valim PDF

By Jose Valim

ISBN-10: 1937785556

ISBN-13: 9781937785550

Rails is likely one of the such a lot extensible frameworks in the market. This pioneering ebook deep-dives into the Rails plugin APIs and indicates you, the intermediate Rails developer, how you can use them to put in writing larger internet purposes and make your daily paintings with Rails extra efficient.

Show description

Read or Download Crafting Rails 4 Applications. Expert Practices for Everyday Rails Development PDF

Similar web programming books

Get Web Services Platform Architecture: SOAP, WSDL, WS-Policy, PDF

The Insider's consultant to construction step forward prone with latest New internet prone PlatformUsing modern day new internet providers platform, you could construct prone which are safe, trustworthy, effective at dealing with transactions, and compatible on your evolving service-oriented structure. what is extra, you are able to do all that with no compromising the simplicity or interoperability that made net prone so appealing.

Web Accessibility: Web Standards and Regulatory Compliance - download pdf or read online

Internet accessibility not only morally sound – there are criminal tasks in addition Very huge capability viewers, which include internet builders and enterprise managers little or no pageant to this publication

New PDF release: Introduction to Web Matrix: ASP.NET Development for

An creation to net Matrix offers a simple to persist with remedy of the appliance of this new software program, that is quickly turning into the popular automobile for the educating of web design. Written by means of skilled clients, the cloth is gifted in a fashion that makes it excellent for college kids assembly the topic for the 1st time, whether or not they are on an undergraduate or postgraduate path.

Download PDF by Michael Hüttermann: DevOps for Developers

DevOps for builders can provide a realistic, thorough creation to methods, methods and instruments to foster collaboration among software program improvement and operations. Efforts of Agile software program improvement usually finish on the transition part from improvement to operations. This ebook covers the supply of software program, this suggests "the final mile", with lean practices for transport the software program to creation and making it to be had to the tip clients, including the mixing of operations with prior venture levels (elaboration, building, transition).

Additional resources for Crafting Rails 4 Applications. Expert Practices for Everyday Rails Development

Sample text

When invoked, the renderer receives an instance of ActionView::Base called view context and a hash of normalized options used to find, compile, and render a specific template. Whenever we render a template in Rails, its source must be first compiled into executable Ruby code. Every time some Ruby code is executed, its execution happens inside a given context and, in a Rails application, views are executed inside the view context object. All helpers available in our templates, such as form_for() and link_to(), are actually defined in modules included in the view context object.

The template is stored in the database, but we still haven’t told the UsersController to use our new resolver to retrieve it. new When we refresh the page at /users, we see the whole index page once again, retrieved from the database! And, while the template is in the database, the layout still comes from the filesystem. In other words, in a single request, we can get templates from different resolvers in our view paths. Feel free to head back to /sql_templates, manipulate the body of the stored template, and notice that the index() action in the UsersController will change accordingly.

This time our tests fail due to the following reasons: The model should respond to errors The model should respond to persisted? The first failure is related to validations. Active Model does not say anything about validation macros (such as validates_presence_of()), but it requires us to define a method named errors(), which returns a Hash, and each value in this hash is an Array. () which behaves exactly as in Active Record. Furthermore, ActiveModel::Validations also adds several validation macros such as validates(), validates_format_of(), validates_inclusion_of(), and others.

Download PDF sample

Crafting Rails 4 Applications. Expert Practices for Everyday Rails Development by Jose Valim

by George

Rated 4.12 of 5 – based on 19 votes