Download Backbone.js Essentials by Jeremy Walker PDF

By Jeremy Walker

Approximately This Book

build top-notch internet functions via studying the robust instruments supplied by means of Backbone.js
achieve insights into the best way to simplify facts administration and create single-page internet purposes with robust consumer interfaces
this can be a fast paced consultant on the best way to try out, rfile, and leverage third-party libraries, and is helping you get the main out of Backbone.js

Who This booklet Is For

If you're a developer with baseline JavaScript skillability and are accustomed to the jQuery library, then this publication is perfect for you. even if you've attempted development complicated internet functions earlier than and been pissed off by way of the problem of doing so with out the right kind instruments, or no matter if you've purely outfitted uncomplicated web content and are actually trying to create full-featured internet functions, this publication has every thing you want to get prior to the curve.
What you'll Learn

Architect a single-page internet software utilizing Backbone.js
simply transmit information to and from a server-side API (RESTful or now not) utilizing Backbone's types and Classes
upload and alter DOM parts with spine perspectives, and create browsable client-side pages with Routers
rfile your Backbone.js common sense, without or with renowned instruments comparable to JSDoc or Docco, to make sure long term maintainability
hinder insects and simplicity refactoring by way of trying out your code with frameworks similar to QUnit, Mocha, or Buster and auxiliary instruments comparable to Sinon
Use Backbone.js's sister library, Underscore, to achieve the entire energy of a spine application
discover complicated spine recommendations and keep effort and time through the use of the main strong third-party instruments available

In Detail

This e-book deals perception into growing and preserving dynamic Backbone.js net purposes. It delves into the the basics of Backbone.js and is helping you in attaining mastery of the spine library.

Starting with types and Collections, you'll the way to simplify client-side information administration and simply transmit info to and out of your server. subsequent, you'll learn how to use perspectives and Routers to facilitate DOM manipulation and URL regulate in order that your viewers can navigate your whole website with no ever leaving the 1st HTML web page. eventually, you'll methods to mix these construction blocks with different instruments to accomplish high-performance, testable, and maintainable internet purposes.

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Sample text

Destroy ActiveRecord gives us the CRUD methods (Create, Read, Update, and Delete) for free—this alone is a great benefit. But ActiveRecord does a lot more. In the next section we’ll see how it helps us express the relationships between tables. 36 O BJECT -R ELATIONAL M APPERS Cultivating Relationships with Flowers Now that we have so many flowers, we should try to make some wonderful bouquets out of them. We’ll need another table to represent them. Because we know that we will access it with ActiveRecord, we’ll call it bouquets.

Print_report This produces the following values: rose: 1000 in stock. violet: 2000 in stock. sunflower: 500 in stock. 87. 44 O BJECT -R ELATIONAL M APPERS Where to Put Constraints? Putting constraints on columns and on the relationships between tables is a two-edged sword. On the one hand, you have constraints that apply globally and can be checked only by the database system itself. It does not make sense—and often is impossible—to implement primary keys, foreign keys, or unique constraints in your application.

We want to implement the relationship between the bouquets table and the flowers table. By default, ActiveRecord searches for a table that is named after the tables to be joined. Concatenate the table names in lexical order and separate them by an underscore, and you have the name of your join table. In addition, the join columns follow a naming scheme, too. You have to append _id; to the class name in lowercase letters (camel case is turned into underscores). 2: Join Table for Bouquets and Flowers class Flower < ActiveRecord::Base has_and_belongs_to_many :bouquets end Many-to-many relationships are symmetrical, so we have to use the has_and_belongs_to_many( ) macro in both the Flower and Bouquet classes.

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