rails devise app with email

fully functional app demonstarting how to use DEVISE with MAILING facility.

Additional Gems which are used :-

rails_layout
devise
bootstrap
better_error

create a new rails project

rails new devise_app

switch you your newly created app

cd devise_app

open your Gemfile and add

group :development do
  gem "better_errors"
end

bootstrap for some awesome features

gem 'bootstrap-sass', '~> 3.2.0'
gem 'autoprefixer-rails'
gem 'devise'

rails_layout for bootstrap or zorb foundation

group :development do
  gem 'rails_layout'
end

run bundle to install the new gems

bundle

Configuring rails_layout for handling bootstrap

run

rails g layout:install bootstrap3

to install bootstap3 for your app

rails g scaffold post title body:text
rake db:migrate

this will create the post model, controller and views for you

configure Devise

rails g devise:install
rails g devise user
rake db:migrate

this will create a user model for handling the user accounts

Configuring layout for devise and navigational links

rails g layout:navigation
  rails g layout:devise bootstrap3

these commands will add and modify the view files for devise and will add navigation at home page

Creating the mailer

rails g mailer mailer

this will create a mailer for you in app/mailer/mailer.rb , open mailer.rb and add the following code

default from: "from@example.com"
def confirmation_instructions(user)
  @user = user
  mail(to: @user.email, subject: 'Account confirmation_instructions')
end

def reset_password_instructions(user)
  @user = user
  mail(to: @user.email, subject: 'reset_password_instructions')
end
def unlock_instructions(user)
  @user = user
  mail(to: @user.email, subject: 'unlock_instructions')
end

this are the functions which will be invoked by devise for you, to change the views created by devise for you run

rails g devise:views

SMTP configuration

add these lines of code in your config/env/develpoment.rb

config.action_mailer.default_url_options = { host: 'localhost', port: 3000 }
config.action_mailer.delivery_method = :smtp
# SMTP settings for gmail
config.action_mailer.smtp_settings = {
  :address              => "smtp.gmail.com",
  :port                 => 587,
  :user_name            => ENV['gmail_user_name'],
  :password             => ENV['gmail_password'],
  :authentication       => "plain",
  :enable_starttls_auto => true
  }

and set

config.action_mailer.raise_delivery_errors = true

this will raise errors whenever you mess up, but do not worry we have added better_errors!

Setting ENV variables

create a new .env file in your root dir and add

ENV["gmail_user_name"] = yourgamiladdres.com
ENV["gmail_password"]  = youpassword

do not forget to add .env file in you .gitignore file if you are going to push your app on github

Adding relationship between models

add this in your app/model/user.rb

  has_many :posts

add this in your app/post.rb

  belongs_to :user

User Auth Mechanism

add this code in your posts_controller.rb

before_action :authenticate_user!,only: [:new,:edit, :update, :destroy]
before_action :own_auth, only: [:new,:edit, :update, :destroy]
....
....
def create
  @post = Post.new(post_params)
  @user_id = current_user.id
  @post.save
  respond_with(@post)
end
....
....
private
 def own_auth
  if !user_signed_in? || current_user != Post.find(params[:id])
    redirect_to root_path, notice: "you cannot modify this content, please authenticate yourself"
  end
end

now run

rails s

and enjoy your newly created site

created by Lalit Yadav

Rails devise with mail

Rails,Devise,Email