Rails Fundamentals Session One

Rails Fundamentals Session One

This class

• Action View
• Action Controller
• Layout & Rendering
• Routing
• Helpers

Get started

Generate a rails application

rails new

Start a new rails server

rails s

Generate Controllers

rails g controller

Routes (Verb + URL)

• Start going through your rails applications by going through the routes first
• Inspect the verbs, for example GET should be equivalent to a read-only route

Inspect the logs

• the route and how it resolves to a controller and the method

To see additional options that are offered by the rails cli

rails -h

Rails has smart defaults and it will reload everything for you in the development environment.

Mockup HTML with Bootstrap

• For view, you can add the bootstrap library.
• It will be included in every page in the project

Partials

• denoted by _
• cleans up bloat in a large main index page and provides some modularity

Actions

• Add a button
• integrate that button with an action

Working with Data - active models and rails console!

Generate the model

rails g model

It’s better to generate the resource, which includes the RESTful routes

rails g resource

Active Record migration

• timestamps auto-creates the created_at and updated_at

Instance variables

@questions = Questions.all

This is a rails convention, all the instance variables are available in the view.

• Add a method to Question ActiveRecordModel, gravatar
• Expose that method directly to the view!

View Helpers

Built-in helper

form_for

Create Action

1. Add a Button
2. Pass the params
3. In the create method in the controller

   Question.create(params[:question])
   

Strong parameters

Use secure parameters

def secure_params
  params.require(:question).permit(:email, :body)
end

Next class

Referencing URLs with names and helpers

Relationships

• has_many/belongs_to
• Ordering
• DRY

Subsequent classes

• Action Mailer & Active Job
• Asset Pipeline
• Deployment
• Debugging for Self Reliance