(1) Add gem
gem ‘design’
(2) Add design configuration file
/ workspace / shop: $ rails generate devise: install User
create config / initializers / devise.rb
create config / locales / devise.en.yml
======================================================= ===============================
Some setup you must do manually if you have n‘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’, port: 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:
<p class = "notice"> <% = notice%> </ p>
<p class = "alert"> <% = alert%> </ p>
4. If you are deploying on Heroku with Rails 3.2 only, 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.
5. You can copy Devise views (for customization) to your app by running:
rails g devise: views
======================================================= ===============================
(3) Add a user model
/ workspace / shop: $ rails generate devise User
invoke active_record
create db / migrate / 20151026095446_devise_create_users.rb
create app / models / user.rb
invoke rspec
create spec / models / user_spec.rb
insert app / models / user.rb
route devise_for: users
(4) Install the design view file
/ workspace / shop: $ rails g devise: views
invoke Devise :: Generators :: SharedViewsGenerator
create app / views / devise / shared
create app / views / devise / shared / _links.html.erb
invoke form_for
create app / views / devise / confirmations
create app / views / devise / confirmations / new.html.erb
create app / views / devise / passwords
create app / views / devise / passwords / edit.html.erb
create app / views / devise / passwords / new.html.erb
create app / views / devise / registrations
create app / views / devise / registrations / edit.html.erb
create app / views / devise / registrations / new.html.erb
create app / views / devise / sessions
create app / views / devise / sessions / new.html.erb
create app / views / devise / unlocks
create app / views / devise / unlocks / new.html.erb
invoke erb
create app / views / devise / mailer
create app / views / devise / mailer / confirmation_instructions.html.erb
create app / views / devise / mailer / reset_password_instructions.html.erb
create app / views / devise / mailer / unlock_instructions.html.erb
(5) Generate the following table
/ workspace / shop: $ rake db: migrate
== 20151026095446 DeviseCreateUsers: migrating ====================================
-create_table (: users)
-> 0.0312s
-add_index (: users,: email, (: unique => true))
-> 0.0004s
-add_index (: users,: reset_password_token, (: unique => true))
-> 0.0004s
== 20151026095446 DeviseCreateUsers: migrated (0.0322s) ==========================
(6) Added login to the navigation bar app / views / layouts / application.html.erb
<ul class = "nav navbar-nav navbar-right">
<% if user_signed_in?%>
<li> <% = link_to current_user.email, profile_path%> </ li>
<li> <% = link_to "Quit", destroy_user_session_path, method:: delete%> </ li>
<% else%>
<li> <% = link_to "login", new_user_session_path%> </ li>
<li> <% = link_to "Registration", new_user_registration_path%> </ li>
<% end%>
</ ul>
(7) Modify the style of the login page
<div class = "row">
<div class = "col-md-6">
<% = form_for (resource, as: resource_name, url: session_path (resource_name)) do | f |%>
<div class = "form-group">
<% = f.label: email, class: "control-label"%>
<% = f.email_field: email, autofocus: true, class: "form-control"%>
</ div>
<div class = "form-group">
<% = f.label: password, class: "control-label"%>
<% = f.password_field: password, autocomplete: "off", class: "form-control"%>
</ div>
<% if devise_mapping.rememberable?-%>
<div class = "form-group">
<% = f.check_box: remember_me%>
<% = f.label: remember_me%>
</ div>
<% end-%>
<div class = "actions">
<% = f.submit "Login", class: "btn btn-primary"%>
<% = link_to "Forgot Password", new_password_path (resource_name), class: "btn btn-link"%>
</ div>
<% end%>
</ div>
</ div>
(8) In order to protect our methods, add a login verification app / controllers / application_controller.rb before each method
class ApplicationController <ActionController :: Base
# Prevent CSRF attacks by raising an exception.
# For APIs, you may want to use: null_session instead.
protect_from_forgery with:: exception
before_action: authentica
te_user!
end
(9) For some pages that can be published without login, add a statement that skips verification in the controller
class ProductsController <ApplicationController
skip_before_action: authenticate_user !, only: [: index,: show]
Add login registration function for the application ruby on rails
