Rails.md

Rails Naming Conventions

Ruby

• Name variables and classes using short phrases.
• Variable names have all letters lowercase separated by underscores (snakecase): this_is_an_example
• Classes and modules capitalize each word in the phrase (mixed case): ThisIsAnExample

Rails Assumes

• Database table names and variable names use snake case.
• Table names are always plural: orders, thid_parties
• Files are named using snake case: application_controller.rb
• Rails converts names automatically:
  • Model
    • Class: LineItem
    • Database Table: line_items
    • Model file: app/models/line_item.rb
  • Controller:
    • Class: StoreController
    • Class file: app/controllers/store_controller.rb
    • URL: http://../store/list/
    • Method: list
  • View:
    • View templates directory: app/views/store/
    • View file: app/views/store/list.html.erb or .builder
    • Layout template: app/views/layouts/store.html.erb
    • Helper module: StoreHelper
    • Helper file: app/helpers/store_helper.rb
  • Controller Modules:
    • Similar controller can be grouped into a namespace
    • URL: http://../admin/book
    • Controller file: book_controller.rb
    • Controller directory: app/controllers/admin/
    • Class definition: class Admin::BookController < ActionController::Base
    • Views: app/views/admin/book/edit.html.erb
    • Generator: rails generate controller Admin::Book action1 action2..

SQL Types and Ruby Classes

SQL Type	Ruby Class
int, integer	Fixnum
float, double	Float
decimal, numeric	BigDecimal
char, varchar, string	String
interval, date	Date
datetime, time	Time
clob, blob, text	String
boolean	convenience method with ?