Sio 2 Books > Programming > Read e-book online Addison-Wesley Professional Ruby Series Rails Plugins: PDF

Read e-book online Addison-Wesley Professional Ruby Series Rails Plugins: PDF

By Adam J.

Essentially the most strong elements of the Rails framework is the power to increase and override it inside your personal purposes. this can be accomplished in the course of the Rails plugin mechanism, which supplies an road for Rails builders so as to add robust new good points to their purposes and proportion this performance with the global community.This brief reduce introduces Rails plugins and considers every one point in their habit and improvement. you are going to study what plugins are, how they paintings, and why they are priceless. observe how to define and set up plugins utilizing the supplied script, then discover the realm of plugin improvement, together with universal plugin idioms, checking out, and model keep an eye on. eventually, percentage your personal plugins.

Show description

Read or Download Addison-Wesley Professional Ruby Series Rails Plugins: Extending Rails Beyond the Core PDF

Best programming books

New PDF release: Accelerating MATLAB with GPU Computing: A Primer with

Past simulation and set of rules improvement, many builders more and more use MATLAB even for product deployment in computationally heavy fields. This usually calls for that MATLAB codes run speedier via leveraging the disbursed parallelism of photographs Processing devices (GPUs). whereas MATLAB effectively presents high-level features as a simulation device for swift prototyping, the underlying info and data wanted for using GPUs make MATLAB clients hesitate to step into it.

Beginning SharePoint 2013 Development by Chris Johnson, Steve Fox, Donovan Follette PDF

A whole revision to a well-liked SharePoint developer's resource

Fully up-to-date for SharePoint 2013, this e-book is a perfect origin for SharePoint improvement. overlaying all of the significant subject matters new developer must comprehend so one can start, this source comprises one hundred pc new content material and addresses the foremost overhaul to the SharePoint 2013 platform. The group of authors, led through Microsoft's Steve Fox, offers you with a close evaluate that is helping you identify a kick off point for improvement. They then stroll you thru how you can improve your wisdom so you leverage the hot SharePoint 2013 positive factors to construct customized solutions.

Addresses constructing controlled or unmanaged purposes
presents an summary of home windows Azure for SharePoint
appears to be like at universal developer initiatives in SharePoint 2013
will get you begun with construction, packaging, and deploying SharePoint 2013 functions
Highlights crucial issues of defense in SharePoint 2013

Touching on every little thing from constructing purposes utilizing place of work providers to improvement workflow functions, starting SharePoint 2013 improvement covers every little thing you want to comprehend to begin hopefully operating with the platform this day.

Get Programming Languages and Systems: 19th European Symposium PDF

This publication constitutes the refereed lawsuits of the nineteenth ecu Symposium on Programming, ESOP 2010, held in Paphos, Cyprus, in March 2010, as a part of ETAPS 2010, the ecu Joint meetings on concept and perform of software program. The 30 revised complete papers, awarded including invited talks (one summary and one full), have been conscientiously reviewed and chosen from 121 complete paper submissions.

Additional info for Addison-Wesley Professional Ruby Series Rails Plugins: Extending Rails Beyond the Core

Sample text

Each time the object is saved, a checksum of the model's attributes is stored in the model itself. You can use this to check that nothing outside of your Rails application has tainted the database (yes, this is paranoid, but it makes for a good example). Before starting to implement this plugin, it is again worth thinking about how you want to use this plugin once it's finished. 8 shows how your finished plugin will be used in a running Rails application. 8. The finished simple checksum plugin in use class Thing < ActiveRecord::Base has_many :other_things acts_as_checksummed #our new behavior-specifying method # the rest of the model code...

4), when the store_breadcrumbs method is encountered in the class definition, its implementation in the ClassMethods module is run. This results in a before_filter being added to the controller, which will call the drop_breadcrumb method before each request. To summarize, this example presents a simple mechanism you can use to abstract common method definitions and class features into a plugin. It also shows how to make those features available to classes by including a single class method "macro" in the class definition.

2. rb, users of your plugin are not required to add anything to their applications in order to use the new functionality. This method of adding functionality to existing Rails classes is one of the key tools for a plugin developer. rb files in currently available plugins will show similar lines for injecting functionality into ActiveRecord, TestUnit, and many other Ruby libraries. 30 31 Summary You've now seen the second key facet of a pluginthe lib directory in your plugin. This directory is added to Ruby's load path (which can be interrogated from the console via the $LOAD_PATH global variable), allowing Rails to find the classes, modules, and methods that your plugin carries as its payload.

Download PDF sample

Addison-Wesley Professional Ruby Series Rails Plugins: Extending Rails Beyond the Core by Adam J.


by Robert
4.1

Rated 4.14 of 5 – based on 10 votes