To create the application, you can cut and paste the code from the blog into your console ELSE do git clone rails_3_devise app and get real time experience with device.
1. Creates a new Rails app named rails_3_devise on your computer. Type the below command.
$ rails new rails_3_devise --d mysql
Use the flag --d mysql specify mysql as database, As we know rails having default sqlite db.
Now we move to app by typing
$ cd rails_3_devise
2. Finally we have to push our code to github, So doing some basic cammand to initialize git and pushing code to github .
$ git initInitialized empty Git repository in /home/maisa/workspace/rails_3_devise/.git/
$ git add .
$ git commit -m "First commint"
3. Once we make sure our app is working
$ rails s -p 4000
And check from browser http://localhost:4000/
4. Set Up Authentication, First things first, add “devise” to your rails Gemfile in the root directory of your application And do
$ bundle update
Fetching gem metadata from https://rubygems.org/.........
Using warden (1.1.1)
Using devise (2.1.0)
Using jquery-rails (2.0.2)
Using rails (3.2.3)
Using sass (3.1.18)
We will see latest devie 2.1.0 has installed
Now following the install docs on the Devise project page. And run
$ rails g devise:install
create config/initializers/devise.rb
create config/locales/devise.en.yml
==================================================================
Some setup you must do manually if you haven't yet:
1. Ensure you have defined default url options in your environments files. Here
is an example of default_url_options appropriate for a development environment
in config/environments/development.rb:
config.action_mailer.default_url_options = { :host => 'localhost:3000' }
In production, :host should be set to the actual host of your application.
2. Ensure you have defined root_url to *something* in your config/routes.rb.
For example:
root :to => "home#index"
3. Ensure you have flash messages in app/views/layouts/application.html.erb.
For example:
<% flash.each do |name, msg| %>
<%= content_tag :div, msg, :id => "flash_#{name}" if msg.is_a?(String) %>
<% end %>
If you are deploying Rails 3.2.3 on Heroku, you may want to set:
config.assets.initialize_on_precompile = false
On config/application.rb forcing your application to not access the DB
or load models when precompiling your assets.
================================================================
Alright, based on the install output it looks like we need to do a little setup work… Make sure we are following all above instruction.
After you are finished configuring the application its time to create your user model.
$ rails generate devise User
invoke active_record
create db/migrate/20120516110556_devise_create_users.rb
create app/models/user.rb
invoke test_unit
create test/unit/user_test.rb
create test/fixtures/users.yml
insert app/models/user.rb
route devise_for :users
invoke active_record
create db/migrate/20120516110556_devise_create_users.rb
create app/models/user.rb
invoke test_unit
create test/unit/user_test.rb
create test/fixtures/users.yml
insert app/models/user.rb
route devise_for :users
Great, lets take a look at what the generator created starting with the migration.
class DeviseCreateUsers < ActiveRecord::Migration
def change
create_table(:users) do |t|
## Database authenticatable
t.string :email, :null => false, :default => ""
t.string :encrypted_password, :null => false, :default => ""
## Recoverable
t.string :reset_password_token
t.datetime :reset_password_sent_at
## Rememberable
t.datetime :remember_created_at
## Trackable
t.integer :sign_in_count, :default => 0
t.datetime :current_sign_in_at
t.datetime :last_sign_in_at
t.string :current_sign_in_ip
t.string :last_sign_in_ip
## Confirmable
# t.string :confirmation_token
# t.datetime :confirmed_at
# t.datetime :confirmation_sent_at
# t.string :unconfirmed_email # Only if using reconfirmable
## Lockable
# t.integer :failed_attempts, :default => 0 # Only if lock strategy is :failed_attempts
# t.string :unlock_token # Only if unlock strategy is :email or :both
# t.datetime :locked_at
## Token authenticatable
# t.string :authentication_token
t.timestamps
end
add_index :users, :email, :unique => true
add_index :users, :reset_password_token, :unique => true
# add_index :users, :confirmation_token, :unique => true
# add_index :users, :unlock_token, :unique => true
# add_index :users, :authentication_token, :unique => true
end
end
Now let’s take a look at our User model.
class User < ActiveRecord::Base
# Include default devise modules. Others available are:
# :token_authenticatable, :confirmable,
# :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
# Setup accessible (or protected) attributes for your model
attr_accessible :email, :password, :password_confirmation, :remember_me
# attr_accessible :title, :body
end
We don’t need to setup our routes for user because devise has already added devise_for :users to our config/routes.rb for us. If we then run rake routes from the command line we get:
$ rake routes user
home_index GET /home/index(.:format) home#index
new_user_session GET /users/sign_in(.:format) devise/sessions#new
user_session POST /users/sign_in(.:format) devise/sessions#create
destroy_user_session DELETE /users/sign_out(.:format) devise/sessions#destroy
user_password POST /users/password(.:format) devise/passwords#create
new_user_password GET /users/password/new(.:format) devise/passwords#new
edit_user_password GET /users/password/edit(.:format) devise/passwords#edit
PUT /users/password(.:format) devise/passwords#update
cancel_user_registration GET /users/cancel(.:format) devise/registrations#cancel
user_registration POST /users(.:format) devise/registrations#create
new_user_registration GET /users/sign_up(.:format) devise/registrations#new
edit_user_registration GET /users/edit(.:format) devise/registrations#edit
PUT /users(.:format) devise/registrations#update
DELETE /users(.:format) devise/registrations#destroy
root / home#index
Finally it’s time to migrate our database and create our user model.
$ rake db:migrate== DeviseCreateUsers: migrating ==============================================
-- create_table(:users)
-> 0.0175s
-- add_index(:users, :email, {:unique=>true})
-> 0.0010s
-- add_index(:users, :reset_password_token, {:unique=>true})
-> 0.0012s
== DeviseCreateUsers: migrated (0.0202s) =====================================
5. Now let's create a Home Page and add custom message to index page
$ rails generate controller home index --no-controller-specs create app/controllers/home_controller.rb
route get "home/index"
invoke erb
create app/views/home
create app/views/home/index.html.erb
invoke test_unit
create test/functional/home_controller_test.rb
invoke helper
create app/helpers/home_helper.rb
invoke test_unit
create test/unit/helpers/home_helper_test.rb
invoke assets
invoke coffee
create app/assets/javascripts/home.js.coffee
invoke scss
create app/assets/stylesheets/home.css.scss
And remove default public index page, As we expecting home/index will be our default page.
$ rm public/index.html
And will add root url to routes.rb file and protect home_controller.rb by adding
before_filter :authenticate_user!
At top of index action.
root :to => "home#index"
Now we almost done. Finally we need to create an Application Layout with few links like login, logout,sign. For that we Create a shared directory under app/views/. Then create the file app/views/shared/_navigation.html.erb and add:
<% if user_signed_in? %>
<li>
<%= link_to('Logout', destroy_user_session_path, :method=>'delete') %>
</li>
<% else %>
<li>
<%= link_to('Login', new_user_session_path) %>
</li>
<% end %>
<% if user_signed_in? %>
<li>
<%= link_to('Edit account', edit_user_registration_path) %>
</li>
<% else %>
<li>
<%= link_to('Sign up', new_user_registration_path) %>
</li>
<% end %>
Then use these partials in your app/views/layouts/application.html.erb file, like this:
<ul class="hmenu">
<%= render 'shared/navigation' %>
</ul>
<% flash.each do |name, msg| %>
<%= content_tag :div, msg, :id => "flash_#{name}" if msg.is_a?(String) %>
<% end %>
<%= yield %>
Now Add stylesheet rules to the application.css.scss file:
header nav ul {
list-style: none;
margin: 0 0 2em;
padding: 0;
}
header nav ul li {
display: inline;
}
#flash_notice, #flash_alert {
padding: 5px 8px;
margin: 10px 0;
}
#flash_notice {
background-color: #CFC;
border: solid 1px #6C6;
}
#flash_alert {
background-color: #FCC;
border: solid 1px #C66;
}
That all coding part.
Now it’s time to start our rails server and see what devise has given us. Run rails server from the command line and lets travel to “localhost:4000/
That's expected. As we protected our home page. Now we need to sign_up and post sign_in. After using right credentials we will see
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