Seminar

Some ways to DRY in Rails

Presenter: Bui Trung Kien Framgia Inc

Content

Model

Controller

Views

Model

Use 'scope'scope :admin, ->{where(admin: true)}

Use 'module'

app/model/concern/set_user.rbmodule SetUser //code goes hereend

app/model/user.rbclass Admin < ActiveRecord::Base include SetUser

Controller

Use 'before_action'

app/controllers/users_controller.rbclass UsersController < ApplicationController before_action :set_user, only: [:show, :edit, :update, :destroy]...privatedef set_user @user = User.find params[:id]end

Controller

Use respond_with and respond_to

class UsersController < ApplicationController respond_to :html, :json, :xml

def index @users = User.all respond_with @usersend

Controller

Move business code logic into model methods.

Move view logic code into helper methods.And then try to DRY it up.

View

Use 'partial'.

Use nested layout.

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