為應用增加登入註冊功能 ruby on rails

標籤：

(1)新增gem

gem ‘devise‘

 

(2)添加devise設定檔

/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 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‘, 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) 添加一個user的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) 安裝devise視圖檔案

/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)產生下表

/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)導覽列增加登入 註冊的入口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 "退出", destroy_user_session_path, method: :delete %></li>            <% else %>              <li><%= link_to "登入", new_user_session_path %></li>              <li><%= link_to "註冊", new_user_registration_path %></li>            <% end %>          </ul>

(7)修改下登入頁面的樣式

<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 "登入", class: "btn btn-primary" %>        <%= link_to "忘記密碼", new_password_path(resource_name), class: "btn btn-link" %>      </div>    <% end %>  </div></div>

(8)為了保護我們的方法，在每個方法前加一個登入校正app/controllers/application_controller.rb

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 :authenticate_user!end

(9)對於不需要登入就可以公開的一些頁面，在controller裡增加跳過驗證的語句

class ProductsController < ApplicationController  skip_before_action :authenticate_user!, only: [:index, :show]

 

為應用增加登入註冊功能 ruby on rails