Ruby Style

#Ruby Style Style, Refactoring and CodeSmells

##Sandi Mets Rules ###No mothod can be longer than ###No calss can be longer than 100 lines ###Only ever send one instance method form the controller to the view

##Scopes

scope :all_active, -> { where(status: "active") }

class Products < ActiveRecord::Base
  default_scope { where(status: "active") }
end

class ProductsController < applicationController
  def index
    @production = Product.all_active
  end
end
class ProductsController < applicationController
  def index
    @production = Product.all_active
  end
end

##class methods

class Event
  attr_reader :time, name

  def initialize(attrs={})
    @time     = attrs.time
    @name     = attrs.name
    @location = attrs.location
  end

  def self.find(attrs)
    attrs = #DB lookup that ret
    new(attrs)
  end
end

##Presenters in rails controllers Creating a single instance veriable in the controller to pass to the view

class HomeController < ApplicationController
  def show
    @presenter = HomePagePresenter.new(params[:category_id])
  end
end

class HomePagePresenter
  attr_reader 
  def initialize(category_id)
   @category_id = category_id
  end

  def categories
    Category.all.sort
  end

  def products
    Products.essentials.sample(3)
  end

  def category_messages
    if category_id == "food"
      "Do some stuff"
    else
      "Do somthing else"
    end
  end
end