Rails Views

(Part II)

Quick lecture overview

• Asset Pipeline
• Assets. Where to place?
• Migration to HAML
• Writing own helpers
• Bootstrap integration

Asset Pipeline

The asset pipeline provides a framework to concatenate and minify or compress JavaScript and CSS assets. It also adds the ability to write these assets in other languages and pre-processors such as CoffeeScript, Sass and ERB.

Assets. Where to place?

Pipeline assets can be placed inside an application in one of three locations: app/assets, lib/assets or vendor/assets.

• app/assets is for assets that are owned by the application, such as custom images, JavaScript files or stylesheets;
• lib/assets is for your own libraries' code that doesn't really fit into the scope of the application or those libraries which are shared across applications;
• vendor/assets is for assets that are owned by outside entities, such as code for JavaScript plugins and CSS frameworks.

Migration to HAML

Haml is a templating engine for HTML. It provides an elegant syntax that's both powerful and easy to understand. Rails installation:

gem 'haml'
					

Writing own helpers

Using helpers we could place logic directly in the view.

Message

module ColorHelper
	def colored_class
		return 'red' if params[:error].present?
		'green'
	end
end
					

Bootstrap integration

Bootstrap is the most popular HTML, CSS, and JS framework for developing responsive, mobile first projects on the web.

No questions? No answers!

Created by Vasyl Lasiak / @vlasiak